Ofer Lahav

Ofer Lahav

University College London

H-index: 138

Europe-United Kingdom

Ofer Lahav Information

University

University College London

Position

Perren Professor of Astronomy

Citations(all)

174336

Citations(since 2020)

62084

Cited By

136764

hIndex(all)

138

hIndex(since 2020)

95

i10Index(all)

582

i10Index(since 2020)

434

Email

University Profile Page

University College London

Ofer Lahav Skills & Research Interests

Cosmology

Astrophysics

Top articles of Ofer Lahav

Dark Energy Survey Year 3 results: redshift calibration of the MagLim lens sample from the combination of SOMPZ and clustering and its impact on cosmology

Authors

G Giannini,A Alarcon,M Gatti,A Porredon,M Crocce,GM Bernstein,R Cawthon,C Sánchez,C Doux,J Elvin-Poole,M Raveri,J Myles,H Lin,A Amon,S Allam,O Alves,F Andrade-Oliveira,E Baxter,K Bechtol,MR Becker,J Blazek,H Camacho,A Campos,A Carnero Rosell,M Carrasco Kind,A Choi,J Cordero,J De Vicente,J DeRose,HT Diehl,S Dodelson,A Drlica-Wagner,K Eckert,X Fang,A Farahi,P Fosalba,O Friedrich,D Gruen,RA Gruendl,J Gschwend,I Harrison,WG Hartley,EM Huff,M Jarvis,E Krause,N Kuropatkin,P Lemos,N MacCrann,J McCullough,J Muir,S Pandey,J Prat,M Rodriguez-Monroy,AJ Ross,ES Rykoff,S Samuroff,LF Secco,I Sevilla-Noarbe,E Sheldon,MA Troxel,DL Tucker,N Weaverdyck,B Yanny,B Yin,Y Zhang,TMC Abbott,M Aguena,D Bacon,E Bertin,S Bocquet,D Brooks,DL Burke,J Carretero,FJ Castander,M Costanzi,LN Da Costa,MES Pereira,S Desai,P Doel,Ismael Ferrero,B Flaugher,D Friedel,J Frieman,J García-Bellido,DW Gerdes,G Gutierrez,SR Hinton,DL Hollowood,K Honscheid,DJ James,S Kent,K Kuehn,O Lahav,C Lidman,M Lima,P Melchior,J Mena-Fernández,F Menanteau,R Miquel,RLC Ogando,M Paterno,F Paz-Chinchón,A Pieres,AA Plazas Malagón,A Roodman,E Sanchez,V Scarpine,M Smith,E Suchyta,MEC Swanson,G Tarle,D Thomas,C To,M Vincenzi,(DES Collaboration)

Journal

Monthly Notices of the Royal Astronomical Society

Published Date

2024/1

We present an alternative calibration of the MagLim lens sample redshift distributions from the Dark Energy Survey (DES) first 3 yr of data (Y3). The new calibration is based on a combination of a self-organizing-map-based scheme and clustering redshifts to estimate redshift distributions and inherent uncertainties, which is expected to be more accurate than the original DES Y3 redshift calibration of the lens sample. We describe in detail the methodology, and validate it on simulations and discuss the main effects dominating our error budget. The new calibration is in fair agreement with the fiducial DES Y3 n(z) calibration, with only mild differences (<3σ) in the means and widths of the distributions. We study the impact of this new calibration on cosmological constraints, analysing DES Y3 galaxy clustering and galaxy–galaxy lensing measurements, assuming a Lambda cold dark matter cosmology. We obtain Ω …

Cosmological constraints from the tomography of DES-Y3 galaxies with CMB lensing from ACT DR4

Authors

GA Marques,MS Madhavacheril,O Darwish,S Shaikh,M Aguena,O Alves,S Avila,D Bacon,EJ Baxter,K Bechtol,MR Becker,E Bertin,J Blazek,J Richard Bond,D Brooks,H Cai,E Calabrese,A Carnero Rosell,M Carrasco Kind,J Carretero,R Cawthon,M Crocce,LN da Costa,MES Pereira,J De Vicente,S Desai,HT Diehl,P Doel,C Doux,A Drlica-Wagner,J Dunkley,J Elvin-Poole,S Everett,Simone Ferraro,I Ferrero,B Flaugher,P Fosalba,J García-Bellido,M Gatti,G Giannini,V Gluscevic,D Gruen,RA Gruendl,G Gutierrez,I Harrison,J Colin Hill,SR Hinton,DL Hollowood,K Honscheid,D Huterer,N Jeffrey,J Kim,K Kuehn,O Lahav,P Lemos,M Lima,KM Huffenberger,N MacCrann,JL Marshall,J Mena-Fernández,R Miquel,JJ Mohr,K Moodley,J Muir,S Naess,F Nati,LA Page,A Palmese,AA Plazas Malagón,A Porredon,J Prat,FJ Qu,M Raveri,AJ Ross,ES Rykoff,GS Farren,S Samuroff,E Sanchez,M Schubnell,N Sehgal,I Sevilla-Noarbe,E Sheldon,BD Sherwin,C Sifón,M Smith,DN Spergel,ST Staggs,E Suchyta,G Tarle,C To,A Van Engelen,N Weaverdyck,J Weller,L Wenzl,P Wiseman,EJ Wollack,B Yanny

Journal

Journal of Cosmology and Astroparticle Physics

Published Date

2024/1/12

We present a measurement of the cross-correlation between the MagLim galaxies selected from the Dark Energy Survey (DES) first three years of observations (Y3) and cosmic microwave background (CMB) lensing from the Atacama Cosmology Telescope (ACT) Data Release 4 (DR4), reconstructed over∼ 436 deg 2 of the sky. Our galaxy sample, which covers∼ 4143 deg 2, is divided into six redshift bins spanning the redshift range of 0.20< z< 1.05. We adopt a blinding procedure until passing all consistency and systematics tests. After imposing scale cuts for the cross-power spectrum measurement, we reject the null hypothesis of no correlation at 9.1 σ. We constrain cosmological parameters from a joint analysis of galaxy and CMB lensing-galaxy power spectra considering a flat ΛCDM model, marginalized over 23 astrophysical and systematic nuisance parameters. We find the clustering amplitude S 8≡ σ 8 (Ω …

The Cosmological Parameters (2023)

Authors

Ofer Lahav,Andrew R Liddle

Journal

arXiv preprint arXiv:2403.15526

Published Date

2024/3/22

This is a review article for The Review of Particle Physics 2024 (aka the Particle Data Book), appearing as Chapter 25. It forms a compact review of knowledge of the cosmological parameters near the end of 2023. Topics included are Parametrizing the Universe; Extensions to the standard model; Probes; Bringing observations together; Outlook for the future.

Dark Energy Survey: Galaxy Sample for the Baryonic Acoustic Oscillation Measurement from the Final Dataset

Authors

J Mena-Fernández,M Rodríguez-Monroy,S Avila,A Porredon,KC Chan,H Camacho,N Weaverdyck,I Sevilla-Noarbe,E Sanchez,L Cipriano,J De Vicente,I Ferrero,R Cawthon,A Carnero Rosell,J Elvin-Poole,G Giannini,M Adamow,K Bechtol,A Drlica-Wagner,RA Gruendl,WG Hartley,A Pieres,AJ Ross,ES Rykoff,E Sheldon,B Yanny,TMC Abbott,M Aguena,S Allam,O Alves,A Amon,F Andrade-Oliveira,J Annis,D Bacon,J Blazek,S Bocquet,D Brooks,J Carretero,FJ Castander,C Conselice,M Crocce,LN da Costa,MES Pereira,TM Davis,N Deiosso,S Desai,HT Diehl,S Dodelson,C Doux,S Everett,J Frieman,J García-Bellido,E Gaztanaga,G Gutierrez,SR Hinton,DL Hollowood,K Honscheid,D Huterer,K Kuehn,O Lahav,S Lee,C Lidman,H Lin,JL Marshall,F Menanteau,R Miquel,J Myles,RLC Ogando,A Palmese,WJ Percival,AA Malagón,A Roodman,R Rosenfeld,S Samuroff,D Sanchez Cid,B Santiago,M Schubnell,M Smith,E Suchyta,MEC Swanson,G Tarle,D Thomas,C To,DL Tucker,AR Walker,J Weller,P Wiseman,M Yamamoto

Journal

arXiv preprint arXiv:2402.10697

Published Date

2024/2/16

In this paper we present and validate the galaxy sample used for the analysis of the baryon acoustic oscillation (BAO) signal in the Dark Energy Survey (DES) Y6 data. The definition is based on a color and redshift-dependent magnitude cut optimized to select galaxies at redshifts higher than 0.6, while ensuring a high-quality photo- determination. The optimization is performed using a Fisher forecast algorithm, finding the optimal -magnitude cut to be given by <19.64+2.894. For the optimal sample, we forecast an increase in precision in the BAO measurement of 25% with respect to the Y3 analysis. Our BAO sample has a total of 15,937,556 galaxies in the redshift range 0.6<<1.2, and its angular mask covers 4,273.42 deg to a depth of =22.5. We validate its redshift distributions with three different methods: directional neighborhood fitting algorithm (DNF), which is our primary photo- estimation; direct calibration with spectroscopic redshifts from VIPERS; and clustering redshift using SDSS galaxies. The fiducial redshift distribution is a combination of these three techniques performed by modifying the mean and width of the DNF distributions to match those of VIPERS and clustering redshift. In this paper we also describe the methodology used to mitigate the effect of observational systematics, which is analogous to the one used in the Y3 analysis. This paper is one of the two dedicated to the analysis of the BAO signal in DES Y6. In its companion paper, we present the angular diameter distance constraints obtained through the fitting to the BAO scale.

The Dark Energy Survey: Cosmology Results With~ 1500 New High-redshift Type Ia Supernovae Using The Full 5-year Dataset

Authors

TMC Abbott,M Acevedo,M Aguena,A Alarcon,S Allam,O Alves,A Amon,F Andrade-Oliveira,J Annis,P Armstrong,J Asorey,S Avila,D Bacon,BA Bassett,K Bechtol,PH Bernardinelli,GM Bernstein,E Bertin,J Blazek,S Bocquet,D Brooks,D Brout,E Buckley-Geer,DL Burke,H Camacho,R Camilleri,A Campos,A Carnero Rosell,D Carollo,A Carr,J Carretero,FJ Castander,R Cawthon,C Chang,R Chen,A Choi,C Conselice,M Costanzi,LN da Costa,M Crocce,TM Davis,DL DePoy,S Desai,HT Diehl,M Dixon,S Dodelson,P Doel,C Doux,A Drlica-Wagner,J Elvin-Poole,S Everett,I Ferrero,A Ferté,B Flaugher,RJ Foley,P Fosalba,D Friedel,J Frieman,C Frohmaier,L Galbany,J García-Bellido,M Gatti,E Gaztanaga,G Giannini,K Glazebrook,O Graur,D Gruen,RA Gruendl,G Gutierrez,WG Hartley,K Herner,SR Hinton,DL Hollowood,K Honscheid,D Huterer,B Jain,DJ James,N Jeffrey,L Kelsey,S Kent,R Kessler,AG Kim,RP Kirshner,E Kovacs,K Kuehn,O Lahav,J Lee,S Lee,GF Lewis,TS Li,C Lidman,H Lin,JL Marshall,P Martini,J Mena-Fernández,F Menanteau,R Miquel,JJ Mohr,J Mould,J Muir,A Möller,E Neilsen,RC Nichol,P Nugent,RLC Ogando,A Palmese,Y-C Pan,M Paterno,WJ Percival,MES Pereira,A Pieres,AA Malagón,B Popovic,A Porredon,J Prat,H Qu,M Raveri,M Rodríguez-Monroy,AK Romer,A Roodman,B Rose,M Sako,E Sanchez,D Sanchez Cid,M Schubnell,D Scolnic,I Sevilla-Noarbe,P Shah,J Smith,M Smith,M Soares-Santos,E Suchyta,M Sullivan,N Suntzeff,MEC Swanson,BO Sánchez,G Tarle,G Taylor,D Thomas,C To,M Toy,MA Troxel,BE Tucker,DL Tucker,SA Uddin,M Vincenzi,AR Walker,N Weaverdyck,RH Wechsler,J Weller

Journal

arXiv preprint arXiv:2401.02929

Published Date

2024/1/5

We present cosmological constraints from the sample of Type Ia supernovae (SN Ia) discovered during the full five years of the Dark Energy Survey (DES) Supernova Program. In contrast to most previous cosmological samples, in which SN are classified based on their spectra, we classify the DES SNe using a machine learning algorithm applied to their light curves in four photometric bands. Spectroscopic redshifts are acquired from a dedicated follow-up survey of the host galaxies. After accounting for the likelihood of each SN being a SN Ia, we find 1635 DES SN in the redshift range that pass quality selection criteria and can be used to constrain cosmological parameters. This quintuples the number of high-quality SNe compared to the previous leading compilation of Pantheon+, and results in the tightest cosmological constraints achieved by any SN data set to date. To derive cosmological constraints we combine the DES supernova data with a high-quality external low-redshift sample consisting of 194 SNe Ia spanning . Using SN data alone and including systematic uncertainties we find in a flat CDM model, and in a flat CDM model. For a flat CDM model, we find $(\Omega_{\rm M},w_0,w_a)=(0.495^{+0.033}_{-0.043},-0.36^{+0.36}_{-0.30},-8.8^{+3.7}_{-4.5})$, consistent with a constant equation of state to within . Including Planck CMB data, SDSS BAO data, and DES -point data gives . In all cases dark energy is consistent with a cosmological constant to within . In our analysis, systematic errors on …

Dark Energy Survey Year 3 results: Simulation-based cosmological inference with wavelet harmonics, scattering transforms, and moments of weak lensing mass maps. Validation on …

Authors

M Gatti,N Jeffrey,L Whiteway,J Williamson,B Jain,V Ajani,D Anbajagane,G Giannini,C Zhou,A Porredon,J Prat,M Yamamoto,J Blazek,T Kacprzak,S Samuroff,A Alarcon,A Amon,K Bechtol,M Becker,G Bernstein,A Campos,C Chang,R Chen,A Choi,C Davis,J Derose,HT Diehl,S Dodelson,C Doux,K Eckert,J Elvin-Poole,S Everett,A Ferte,D Gruen,R Gruendl,I Harrison,WG Hartley,K Herner,EM Huff,M Jarvis,N Kuropatkin,PF Leget,N MacCrann,J McCullough,J Myles,A Navarro-Alsina,S Pandey,M Raveri,RP Rollins,A Roodman,C Sanchez,LF Secco,I Sevilla-Noarbe,E Sheldon,T Shin,M Troxel,I Tutusaus,TN Varga,B Yanny,B Yin,Y Zhang,J Zuntz,M Aguena,O Alves,J Annis,D Brooks,J Carretero,FJ Castander,R Cawthon,M Costanzi,LN Da Costa,MES Pereira,AE Evrard,B Flaugher,P Fosalba,J Frieman,J García-Bellido,DW Gerdes,RA Gruendl,J Gschwend,G Gutierrez,DL Hollowood,K Honscheid,DJ James,K Kuehn,O Lahav,S Lee,JL Marshall,J Mena-Fernández,F Menanteau,R Miquel,RLC Ogando,A Pieres,AA Plazas Malagón,E Sanchez,M Smith,E Suchyta,MEC Swanson,G Tarle,N Weaverdyck,J Weller,P Wiseman,DES Collaboration

Journal

Physical Review D

Published Date

2024/3/21

Beyond-two-point statistics contain additional information on cosmological as well as astrophysical and observational (systematics) parameters. In this methodology paper we provide an end-to-end simulation-based analysis of a set of Gaussian and non-Gaussian weak lensing statistics using detailed mock catalogs of the Dark Energy Survey (DES). We implement: 1) second and third moments; 2) wavelet phase harmonics (WPH); 3) the scattering transform (ST). Our analysis is fully based on simulations, it spans a space of seven ν w CDM cosmological parameters, and it forward models the most relevant sources of systematics of the data (masks, noise variations, clustering of the sources, intrinsic alignments, and shear and redshift calibration). We implement a neural network compression of the summary statistics, and we estimate the parameter posteriors using a likelihood-free-inference approach. We validate …

Dark Energy Survey: A 2.1% measurement of the angular Baryonic Acoustic Oscillation scale at redshift =0.85 from the final dataset

Authors

TMC Abbott,M Adamow,M Aguena,S Allam,O Alves,A Amon,F Andrade-Oliveira,J Asorey,S Avila,D Bacon,K Bechtol,GM Bernstein,E Bertin,J Blazek,S Bocquet,D Brooks,DL Burke,H Camacho,A Carnero Rosell,D Carollo,J Carretero,FJ Castander,R Cawthon,KC Chan,C Chang,C Conselice,M Costanzi,M Crocce,LN da Costa,MES Pereira,TM Davis,J De Vicente,N Deiosso,S Desai,HT Diehl,S Dodelson,C Doux,A Drlica-Wagner,J Elvin-Poole,S Everett,I Ferrero,A Ferté,B Flaugher,P Fosalba,J Frieman,J García-Bellido,E Gaztanaga,G Giannini,RA Gruendl,G Gutierrez,WG Hartley,SR Hinton,DL Hollowood,K Honscheid,D Huterer,DJ James,S Kent,K Kuehn,O Lahav,S Lee,C Lidman,H Lin,JL Marshall,P Martini,J Mena-Fernández,F Menanteau,R Miquel,JJ Mohr,J Myles,RC Nichol,RLC Ogando,A Palmese,WJ Percival,A Pieres,AA Malagón,A Porredon,J Prat,M Rodríguez-Monroy,AK Romer,A Roodman,R Rosenfeld,AJ Ross,ES Rykoff,M Sako,S Samuroff,C Sánchez,E Sanchez,D Sanchez Cid,B Santiago,M Schubnell,I Sevilla-Noarbe,E Sheldon,M Smith,E Suchyta,MEC Swanson,G Tarle,D Thomas,C To,L Cipriano,MA Troxel,BE Tucker,DL Tucker,AR Walker,N Weaverdyck,J Weller,P Wiseman,B Yanny,DES Collaboration

Journal

arXiv preprint arXiv:2402.10696

Published Date

2024/2/16

We present the angular diameter distance measurement obtained with the Baryonic Acoustic Oscillation feature from galaxy clustering in the completed Dark Energy Survey, consisting of six years (Y6) of observations. We use the Y6 BAO galaxy sample, optimized for BAO science in the redshift range 0.6<<1.2, with an effective redshift at =0.85 and split into six tomographic bins. The sample has nearly 16 million galaxies over 4,273 square degrees. Our consensus measurement constrains the ratio of the angular distance to sound horizon scale to = 19.510.41 (at 68.3% confidence interval), resulting from comparing the BAO position in our data to that predicted by Planck CDM via the BAO shift parameter . To achieve this, the BAO shift is measured with three different methods, Angular Correlation Function (ACF), Angular Power Spectrum (APS), and Projected Correlation Function (PCF) obtaining 0.9520.023, 0.9620.022, and 0.9550.020, respectively, which we combine to 0.9570.020, including systematic errors. When compared with the CDM model that best fits Planck data, this measurement is found to be 4.3% and 2.1 below the angular BAO scale predicted. To date, it represents the most precise angular BAO measurement at >0.75 from any survey and the most precise measurement at any redshift from photometric surveys. The analysis was performed blinded to the BAO position and it is shown to be robust against analysis choices, data removal, redshift calibrations and observational systematics.

SPT Clusters with DES and HST Weak Lensing. II. Cosmological Constraints from the Abundance of Massive Halos

Authors

S Bocquet,S Grandis,LE Bleem,M Klein,JJ Mohr,T Schrabback,TMC Abbott,PAR Ade,M Aguena,A Alarcon,S Allam,SW Allen,O Alves,A Amon,AJ Anderson,J Annis,B Ansarinejad,JE Austermann,S Avila,D Bacon,M Bayliss,JA Beall,K Bechtol,MR Becker,AN Bender,BA Benson,GM Bernstein,S Bhargava,F Bianchini,M Brodwin,D Brooks,L Bryant,A Campos,REA Canning,JE Carlstrom,A Carnero Rosell,M Carrasco Kind,J Carretero,FJ Castander,R Cawthon,CL Chang,C Chang,P Chaubal,R Chen,HC Chiang,A Choi,TL Chou,R Citron,C Corbett Moran,J Cordero,M Costanzi,TM Crawford,AT Crites,LN da Costa,MES Pereira,C Davis,TM Davis,J DeRose,S Desai,T de Haan,HT Diehl,MA Dobbs,S Dodelson,C Doux,A Drlica-Wagner,K Eckert,J Elvin-Poole,S Everett,W Everett,I Ferrero,A Ferté,AM Flores,J Frieman,J Gallicchio,J García-Bellido,M Gatti,EM George,G Giannini,MD Gladders,D Gruen,RA Gruendl,N Gupta,G Gutierrez,NW Halverson,I Harrison,WG Hartley,K Herner,SR Hinton,GP Holder,DL Hollowood,WL Holzapfel,K Honscheid,JD Hrubes,N Huang,J Hubmayr,EM Huff,D Huterer,KD Irwin,DJ James,M Jarvis,G Khullar,K Kim,L Knox,R Kraft,E Krause,K Kuehn,N Kuropatkin,F Kéruzoré,O Lahav,AT Lee,P-F Leget,D Li,H Lin,A Lowitz,N MacCrann,G Mahler,A Mantz,JL Marshall,J McCullough,M McDonald,JJ McMahon,J Mena-Fernández,F Menanteau,SS Meyer,R Miquel,J Montgomery,J Myles,T Natoli,A Navarro-Alsina,JP Nibarger,GI Noble,V Novosad,RLC Ogando,Y Omori,S Padin,S Pandey,P Paschos,S Patil,A Pieres,AA Malagón,A Porredon,J Prat,C Pryke,M Raveri,CL Reichardt,J Roberson,RP Rollins,C Romero,A Roodman,JE Ruhl

Journal

arXiv preprint arXiv:2401.02075

Published Date

2024/1/4

We present cosmological constraints from the abundance of galaxy clusters selected via the thermal Sunyaev-Zel'dovich (SZ) effect in South Pole Telescope (SPT) data with a simultaneous mass calibration using weak gravitational lensing data from the Dark Energy Survey (DES) and the Hubble Space Telescope (HST). The cluster sample is constructed from the combined SPT-SZ, SPTpol ECS, and SPTpol 500d surveys, and comprises 1,005 confirmed clusters in the redshift range over a total sky area of 5,200 deg. We use DES Year 3 weak-lensing data for 688 clusters with redshifts and HST weak-lensing data for 39 clusters with . The weak-lensing measurements enable robust mass measurements of sample clusters and allow us to empirically constrain the SZ observable--mass relation. For a flat CDM cosmology, and marginalizing over the sum of massive neutrinos, we measure , , and the parameter combination . Our measurement of and the constraint from Planck CMB anisotropies (2018 TT,TE,EE+lowE) differ by . In combination with that Planck dataset, we place a 95% upper limit on the sum of neutrino masses eV. When additionally allowing the dark energy equation of state parameter to vary, we obtain from our cluster-based analysis. In combination with Planck data, we measure , or a difference with a cosmological constant. We use the cluster abundance to measure in five redshift bins between 0.25 and 1.8, and we find the results to be consistent with structure growth as …

The Wide-field Spectroscopic Telescope (WST) Science White Paper

Authors

Vincenzo Mainieri,Richard I Anderson,Jarle Brinchmann,Andrea Cimatti,Richard S Ellis,Vanessa Hill,Jean-Paul Kneib,Anna F McLeod,Cyrielle Opitom,Martin M Roth,Paula Sanchez-Saez,Rodolfo Smilljanic,Eline Tolstoy,Roland Bacon,Sofia Randich,Angela Adamo,Francesca Annibali,Patricia Arevalo,Marc Audard,Stefania Barsanti,Giuseppina Battaglia,Amelia M Bayo Aran,Francesco Belfiore,Michele Bellazzini,Emilio Bellini,Maria Teresa Beltran,Leda Berni,Simone Bianchi,Katia Biazzo,Sofia Bisero,Susanna Bisogni,Joss Bland-Hawthorn,Stephane Blondin,Julia Bodensteiner,Henri MJ Boffin,Rosaria Bonito,Giuseppe Bono,Nicolas F Bouche,Dominic Bowman,Vittorio F Braga,Angela Bragaglia,Marica Branchesi,Anna Brucalassi,Julia J Bryant,Ian Bryson,Innocenza Busa,Stefano Camera,Carmelita Carbone,Giada Casali,Mark Casali,Viviana Casasola,Norberto Castro,Marcio Catelan,Lorenzo Cavallo,Cristina Chiappini,Maria-Rosa Cioni,Matthew Colless,Laura Colzi,Sofia Contarini,Warrick Couch,Filippo D'Ammando,Valentina D'Orazi,Ronaldo da Silva,Maria Giovanna Dainotti,Francesco Damiani,Camilla Danielski,Annalisa De Cia,Roelof S de Jong,Suhail Dhawan,Philippe Dierickx,Simon P Driver,Ulyana Dupletsa,Stephanie Escoffier,Ana Escorza,Michele Fabrizio,Giuliana Fiorentino,Adriano Fontana,Francesco Fontani,Daniel Forero Sanchez,Patrick Franois,Francisco Jose Galindo-Guil,Anna Rita Gallazzi,Daniele Galli,Miriam Garcia,Jorge Garcia-Rojas,Bianca Garilli,Robert Grand,Mario Giuseppe Guarcello,Nandini Hazra,Amina Helmi,Artemio Herrero,Daniela Iglesias,Dragana Ilic,Vid Irsic,Valentin D Ivanov,Luca Izzo,Pascale Jablonka,Benjamin Joachimi,Darshan Kakkad,Sebastian Kamann,Sergey Koposov,Georges Kordopatis,Andjelka B Kovacevic,Katarina Kraljic,Hanindyo Kuncarayakti,Yuna Kwon,Fiorangela La Forgia,Ofer Lahav,Clotilde Laigle,Monica Lazzarin,Ryan Leaman,Floriane Leclercq,Khee-Gan Lee,David Lee,Matt D Lehnert,Paulina Lira,Eleonora Loffredo,Sara Lucatello,Laura Magrini,Kate Maguire,Guillaume Mahler,Fatemeh Zahra Majidi,Nicola Malavasi,Filippo Mannucci,Marcella Marconi,Nicolas Martin,Federico Marulli,Davide Massari,Tadafumi Matsuno,Jorryt Mattheee,Sean McGee,Jaroslav Merc,Thibault Merle,Andrea Miglio,Alessandra Migliorini,Ivan Minchev,Dante Minniti,Nuria Miret-Roig,Ana Monreal Ibero,Federico Montano,Ben T Montet,Michele Moresco,Chiara Moretti,Lauro Moscardini,Andres Moya,Oliver Mueller,Themiya Nanayakkara,Matt Nicholl,Thomas Nordlander,Francesca Onori

Journal

arXiv preprint arXiv:2403.05398

Published Date

2024/3/8

The Wide-field Spectroscopic Telescope (WST) is proposed as a new facility dedicated to the efficient delivery of spectroscopic surveys. This white paper summarises the initial concept as well as the corresponding science cases. WST will feature simultaneous operation of a large field-of-view (3 sq. degree), a high multiplex (20,000) multi-object spectrograph (MOS) and a giant 3x3 sq. arcmin integral field spectrograph (IFS). In scientific capability these requirements place WST far ahead of existing and planned facilities. Given the current investment in deep imaging surveys and noting the diagnostic power of spectroscopy, WST will fill a crucial gap in astronomical capability and work synergistically with future ground and space-based facilities. This white paper shows that WST can address outstanding scientific questions in the areas of cosmology; galaxy assembly, evolution, and enrichment, including our own Milky Way; origin of stars and planets; time domain and multi-messenger astrophysics. WST's uniquely rich dataset will deliver unforeseen discoveries in many of these areas. The WST Science Team (already including more than 500 scientists worldwide) is open to the all astronomical community. To register in the WST Science Team please visit https://www.wstelescope.com/for-scientists/participate

The Gravitational Lensing Imprints of DES Y3 Superstructures on the CMB: A Matched Filtering Approach

Authors

Umut Demirbozan,Seshadri Nadathur,Ismael Ferrero,Pablo Fosalba,Andras Kovacs,Ramon Miquel,Christopher Davies,Shivam Pandey,Monika Adamow,Keith Bechtol,Alex Drlica-Wagner,Robert Gruendl,Will Hartley,Adriano Pieres,Ashley Ross,Eli Rykoff,Erin Sheldon,Brian Yanny,Tim Abbott,Michel Aguena,Sahar Allam,Otavio Alves,David Bacon,Emmanuel Bertin,Sebastian Bocquet,David Brooks,Aurelio Carnero Rosell,Jorge Carretero,Ross Cawthon,Luiz da Costa,Maria Elidaiana da Silva Pereira,Juan De Vicente,Shantanu Desai,Peter Doel,Spencer Everett,Brenna Flaugher,Douglas Friedel,Josh Frieman,Marco Gatti,Enrique Gaztanaga,Giulia Giannini,Gaston Gutierrez,Samuel Hinton,Devon L Hollowood,David James,Niall Jeffrey,Kyler Kuehn,Ofer Lahav,Sujeong Lee,Jennifer Marshall,Juan Mena-Fernández,Joe Mohr,Justin Myles,Ricardo Ogando,Andrés Plazas Malagón,Aaron Roodman,Eusebio Sanchez,Ignacio Sevilla,Mathew Smith,Marcelle Soares-Santos,Eric Suchyta,Molly Swanson,Gregory Tarle,Noah Weaverdyck,Jochen Weller,Philip Wiseman

Journal

arXiv preprint arXiv:2404.18278

Published Date

2024/4/28

$ $Low density cosmic voids gravitationally lens the cosmic microwave background (CMB), leaving a negative imprint on the CMB convergence . This effect provides insight into the distribution of matter within voids, and can also be used to study the growth of structure. We measure this lensing imprint by cross-correlating the Planck CMB lensing convergence map with voids identified in the Dark Energy Survey Year 3 data set, covering approximately 4,200 deg of the sky. We use two distinct void-finding algorithms: a 2D void-finder which operates on the projected galaxy density field in thin redshift shells, and a new code, Voxel, which operates on the full 3D map of galaxy positions. We employ an optimal matched filtering method for cross-correlation, using the MICE N-body simulation both to establish the template for the matched filter and to calibrate detection significances. Using the DES Y3 photometric luminous red galaxy sample, we measure , the amplitude of the observed lensing signal relative to the simulation template, obtaining ( significance) for Voxel and ( significance) for 2D voids, both consistent with CDM expectations. We additionally invert the 2D void-finding process to identify superclusters in the projected density field, for which we measure ( significance). The leading source of noise in our measurements is Planck noise, implying that future data from the Atacama Cosmology Telescope (ACT), South Pole Telescope (SPT) and CMB-S4 will increase sensitivity and allow for more precise measurements.

The SRG/eROSITA All-Sky Survey: Dark Energy Survey Year 3 Weak Gravitational Lensing by eRASS1 selected Galaxy Clusters

Authors

S Grandis,V Ghirardini,S Bocquet,C Garrel,JJ Mohr,A Liu,M Kluge,L Kimmig,TH Reiprich,A Alarcon,A Amon,E Artis,YE Bahar,F Balzer,K Bechtol,MR Becker,G Bernstein,E Bulbul,A Campos,A Carnero Rosell,M Carrasco Kind,R Cawthon,C Chang,R Chen,I Chiu,A Choi,N Clerc,J Comparat,J Cordero,C Davis,J Derose,HT Diehl,S Dodelson,C Doux,A Drlica-Wagner,K Eckert,J Elvin-Poole,S Everett,A Ferte,M Gatt,G Giannini,P Giles,D Gruen,RA Gruendl,I Harrison,WG Hartley,K Herner,EM Huf,F Kleinebreil,N Kuropatkin,PF Leget,N Maccrann,J Mccullough,A Merloni,J Myles,K Nandra,A Navarro-Alsina,N Okabe,F Pacaud,S Pandey,J Prat,P Predehl,M Ramos,M Raveri,RP Rollins,A Roodman,AJ Ross,ES Rykoff,C Sanchez,J Sanders,T Schrabback,LF Secco,R Seppi,I Sevilla-Noarbe,E Sheldon,T Shin,M Troxel,I Tutusaus,TN Varga,H Wu,B Yanny,B Yin,X Zhang,Y Zhang,O Alves,S Bhargava,D Brooks,DL Burke,J Carretero,M Costanzi,LN da Costa,MES Pereira,J De Vicente,S Desai,P Doel,I Ferrero,B Flaugher,D Friedel,J Frieman,J García-Bellido,G Gutierrez,SR Hinton,DL Hollowood,K Honscheid,DJ James,N Jeffrey,O Lahav,S Lee,JL Marshall,F Menanteau,RLC Ogando,A Pieres,AA Malagón,AK Romer,E Sanchez,M Schubnell,M Smith,E Suchyta,MEC Swanson,G Tarle,N Weaverdyck,J Weller

Journal

arXiv preprint arXiv:2402.08455

Published Date

2024/2/13

Number counts of galaxy clusters across redshift are a powerful cosmological probe, if a precise and accurate reconstruction of the underlying mass distribution is performed -- a challenge called mass calibration. With the advent of wide and deep photometric surveys, weak gravitational lensing by clusters has become the method of choice to perform this measurement. We measure and validate the weak gravitational lensing (WL) signature in the shape of galaxies observed in the first 3 years of the DES Y3 caused by galaxy clusters selected in the first all-sky survey performed by SRG/eROSITA. These data are then used to determine the scaling between X-ray photon count rate of the clusters and their halo mass and redshift. We empirically determine the degree of cluster member contamination in our background source sample. The individual cluster shear profiles are then analysed with a Bayesian population model that self-consistently accounts for the lens sample selection and contamination, and includes marginalization over a host of instrumental and astrophysical systematics. To quantify the accuracy of the mass extraction of that model, we perform mass measurements on mock cluster catalogs with realistic synthetic shear profiles. This allows us to establish that hydro-dynamical modelling uncertainties at low lens redshifts () are the dominant systematic limitation. At high lens redshift the uncertainties of the sources' photometric redshift calibration dominate. With regard to the X-ray count rate to halo mass relation, we constrain all its parameters. This work sets the stage for a joint analysis with the number counts of eRASS1 clusters to …

Main belt asteroids taxonomical information from dark energy survey data

Authors

Valerio Carruba,Julio IB Camargo,Safwan Aljbaae,FS Ferreira,E Lin,V Figueiredo-Peixoto,MV Banda-Huarca,A Pieres,RC Boufleur,LN Da Costa,TMC Abbott,M Aguena,Sahar S Allam,O Alves,PH Bernardinelli,E Bertin,D Brooks,A Carnero Rosell,J Carretero,MES Pereira,TM Davis,J De Vicente,S Desai,P Doel,Ismael Ferrero,D Friedel,J Frieman,J García-Bellido,M Gatti,G Giannini,D Gruen,RA Gruendl,K Herner,SR Hinton,DL Hollowood,DJ James,S Kent,K Kuehn,O Lahav,JL Marshall,J Mena-Fernández,R Miquel,A Palmese,AA Plazas Malagón,M Rodríguez-Monroy,E Sanchez,B Santiago,M Schubnell,M Smith,E Suchyta,MEC Swanson,G Tarle,AR Walker,N Weaverdyck,P Wiseman,(DES Collaboration)

Journal

Monthly Notices of the Royal Astronomical Society

Published Date

2024/1

While proper orbital elements are currently available for more than 1 million asteroids, taxonomical information is still lagging behind. Surveys like SDSS-MOC4 provided preliminary information for more than 100 000 objects, but many asteroids still lack even a basic taxonomy. In this study, we use Dark Energy Survey (DES) data to provide new information on asteroid physical properties. By cross-correlating the new DES data base with other data bases, we investigate how asteroid taxonomy is reflected in DES data. While the resolution of DES data is not sufficient to distinguish between different asteroid taxonomies within the complexes, except for V-type objects, it can provide information on whether an asteroid belongs to the C- or S-complex. Here, machine learning methods optimized through the use of genetic algorithms were used to predict the labels of more than 68 000 asteroids with no prior …

Cosmology from cross-correlation of ACT-DR4 CMB lensing and DES-Y3 cosmic shear

Authors

Shabbir Shaikh,Ian Harrison,A Van Engelen,GA Marques,TMC Abbott,M Aguena,O Alves,A Amon,R An,D Bacon,N Battaglia,MR Becker,GM Bernstein,E Bertin,J Blazek,JR Bond,D Brooks,DL Burke,E Calabrese,A Carnero Rosell,J Carretero,R Cawthon,C Chang,R Chen,A Choi,SK Choi,LN Da Costa,MES Pereira,O Darwish,TM Davis,S Desai,M Devlin,HT Diehl,P Doel,C Doux,J Elvin-Poole,GS Farren,S Ferraro,I Ferrero,A Ferté,B Flaugher,J Frieman,J García-Bellido,M Gatti,G Giannini,S Giardiello,D Gruen,RA Gruendl,G Gutierrez,JC Hill,SR Hinton,DL Hollowood,K Honscheid,KM Huffenberger,D Huterer,DJ James,M Jarvis,N Jeffrey,HT Jense,K Knowles,J Kim,D Kramer,O Lahav,S Lee,M Lima,N MacCrann,MS Madhavacheril,JL Marshall,J McCullough,Y Mehta,J Mena-Fernández,R Miquel,JJ Mohr,K Moodley,J Myles,A Navarro-Alsina,L Newburgh,MD Niemack,Y Omori,S Pandey,B Partridge,A Pieres,AA Plazas Malagón,A Porredon,J Prat,FJ Qu,N Robertson,RP Rollins,A Roodman,S Samuroff,C Sánchez,E Sanchez,D Sanchez Cid,LF Secco,N Sehgal,E Sheldon,BD Sherwin,T Shin,C Sifón,M Smith,E Suchyta,MEC Swanson,G Tarle,MA Troxel,I Tutusaus,C Vargas,N Weaverdyck,P Wiseman,M Yamamoto,J Zuntz,ACT and DES Collaborations)

Journal

Monthly Notices of the Royal Astronomical Society

Published Date

2024/2

Cross-correlation between weak lensing of the Cosmic Microwave Background (CMB) and weak lensing of galaxies offers a way to place robust constraints on cosmological and astrophysical parameters with reduced sensitivity to certain systematic effects affecting individual surveys. We measure the angular cross-power spectrum between the Atacama Cosmology Telescope (ACT) DR4 CMB lensing and the galaxy weak lensing measured by the Dark Energy Survey (DES) Y3 data. Our baseline analysis uses the CMB convergence map derived from ACT-DR4 and Planck data, where most of the contamination due to the thermal Sunyaev Zel’dovich effect is removed, thus avoiding important systematics in the cross-correlation. In our modelling, we consider the nuisance parameters of the photometric uncertainty, multiplicative shear bias and intrinsic alignment of galaxies. The resulting cross-power spectrum …

Weak lensing combined with the kinetic Sunyaev Zel'dovich effect: A study of baryonic feedback

Authors

L Bigwood,A Amon,A Schneider,J Salcido,IG McCarthy,C Preston,D Sanchez,D Sijacki,E Schaan,S Ferraro,N Battaglia,A Chen,S Dodelson,A Roodman,A Pieres,A Ferte,A Alarcon,A Drlica-Wagner,A Choi,A Navarro-Alsina,A Campos,AJ Ross,A Carnero Rosell,B Yin,B Yanny,C Sanchez,C Chang,C Davis,C Doux,D Gruen,ES Rykoff,EM Huff,E Sheldon,F Tarsitano,F Andrade-Oliveira,GM Bernstein,G Giannini,HT Diehl,H Huang,I Harrison,I Sevilla-Noarbe,I Tutusaus,J Elvin-Poole,J McCullough,J Zuntz,J Blazek,J DeRose,J Cordero,J Prat,J Myles,K Eckert,K Bechtol,K Herner,LF Secco,M Gatti,M Raveri,M Carrasco Kind,MR Becker,MA Troxel,M Jarvis,N MacCrann,O Friedrich,O Alves,P-F Leget,R Chen,RP Rollins,RH Wechsler,RA Gruendl,R Cawthon,S Allam,SL Bridle,S Pandey,S Everett,T Shin,WG Hartley,X Fang,Y Zhang,M Aguena,J Annis,D Bacon,E Bertin,S Bocquet,D Brooks,J Carretero,FJ Castander,LN da Costa,MES Pereira,J De Vicente,S Desai,P Doel,I Ferrero,B Flaugher,J Frieman,J Garcia-Bellido,E Gaztanaga,G Gutierrez,SR Hinton,DL Hollowood,K Honscheid,D Huterer,DJ James,K Kuehn,O Lahav,S Lee,JL Marshall,J Mena-Fernandez,R Miquel,J Muir,M Paterno,AA Malagon,A Porredon,AK Romer,S Samuroff,E Sanchez,D Sanchez Cid,M Smith,M Soares-Santos,E Suchyta,MEC Swanson,G Tarle,C To,N Weaverdyck,J Weller,P Wiseman,M Yamamoto

Journal

arXiv preprint arXiv:2404.06098

Published Date

2024/4/9

Extracting precise cosmology from weak lensing surveys requires modelling the non-linear matter power spectrum, which is suppressed at small scales due to baryonic feedback processes. However, hydrodynamical galaxy formation simulations make widely varying predictions for the amplitude and extent of this effect. We use measurements of Dark Energy Survey Year 3 weak lensing (WL) and Atacama Cosmology Telescope DR5 kinematic Sunyaev-Zel'dovich (kSZ) to jointly constrain cosmological and astrophysical baryonic feedback parameters using a flexible analytical model, `baryonification'. First, using WL only, we compare the constraints using baryonification to a simulation-calibrated halo model, a simulation-based emulator model and the approach of discarding WL measurements on small angular scales. We find that model flexibility can shift the value of and degrade the uncertainty. The kSZ provides additional constraints on the astrophysical parameters and shifts to , a higher value than attained using the WL-only analysis. We measure the suppression of the non-linear matter power spectrum using WL + kSZ and constrain a mean feedback scenario that is more extreme than the predictions from most hydrodynamical simulations. We constrain the baryon fractions and the gas mass fractions and find them to be generally lower than inferred from X-ray observations and simulation predictions. We conclude that the WL + kSZ measurements provide a new and complementary benchmark for building a coherent picture of the impact of gas around galaxies across observations.

Dark Energy Survey Year 3 results: likelihood-free, simulation-based CDM inference with neural compression of weak-lensing map statistics

Authors

N Jeffrey,L Whiteway,M Gatti,J Williamson,J Alsing,A Porredon,J Prat,C Doux,B Jain,C Chang,T-Y Cheng,T Kacprzak,P Lemos,A Alarcon,A Amon,K Bechtol,MR Becker,GM Bernstein,A Campos,A Carnero Rosell,R Chen,A Choi,J DeRose,A Drlica-Wagner,K Eckert,S Everett,A Ferté,D Gruen,RA Gruendl,K Herner,M Jarvis,J McCullough,J Myles,A Navarro-Alsina,S Pandey,M Raveri,RP Rollins,ES Rykoff,C Sánchez,LF Secco,I Sevilla-Noarbe,E Sheldon,T Shin,MA Troxel,I Tutusaus,TN Varga,B Yanny,B Yin,J Zuntz,M Aguena,SS Allam,O Alves,D Bacon,S Bocquet,D Brooks,LN da Costa,TM Davis,J De Vicente,S Desai,HT Diehl,I Ferrero,J Frieman,J García-Bellido,E Gaztanaga,G Giannini,G Gutierrez,SR Hinton,DL Hollowood,K Honscheid,D Huterer,DJ James,O Lahav,S Lee,JL Marshall,J Mena-Fernández,R Miquel,A Pieres,AA Malagón,A Roodman,M Sako,E Sanchez,D Sanchez Cid,M Smith,E Suchyta,MEC Swanson,G Tarle,DL Tucker,N Weaverdyck,J Weller,P Wiseman,M Yamamoto

Journal

arXiv preprint arXiv:2403.02314

Published Date

2024/3/4

We present simulation-based cosmological CDM inference using Dark Energy Survey Year 3 weak-lensing maps, via neural data compression of weak-lensing map summary statistics: power spectra, peak counts, and direct map-level compression/inference with convolutional neural networks (CNN). Using simulation-based inference, also known as likelihood-free or implicit inference, we use forward-modelled mock data to estimate posterior probability distributions of unknown parameters. This approach allows all statistical assumptions and uncertainties to be propagated through the forward-modelled mock data; these include sky masks, non-Gaussian shape noise, shape measurement bias, source galaxy clustering, photometric redshift uncertainty, intrinsic galaxy alignments, non-Gaussian density fields, neutrinos, and non-linear summary statistics. We include a series of tests to validate our inference results. This paper also describes the Gower Street simulation suite: 791 full-sky PKDGRAV dark matter simulations, with cosmological model parameters sampled with a mixed active-learning strategy, from which we construct over 3000 mock DES lensing data sets. For CDM inference, for which we allow , our most constraining result uses power spectra combined with map-level (CNN) inference. Using gravitational lensing data only, this map-level combination gives , , and (with a 68 per cent credible interval); compared to the power spectrum inference, this is more than a factor of two improvement in dark energy parameter () precision.

Detection of the significant impact of source clustering on higher order statistics with DES Year 3 weak gravitational lensing data

Authors

M Gatti,N Jeffrey,L Whiteway,V Ajani,T Kacprzak,D Zürcher,C Chang,B Jain,J Blazek,E Krause,A Alarcon,A Amon,K Bechtol,M Becker,G Bernstein,A Campos,R Chen,A Choi,C Davis,J Derose,HT Diehl,S Dodelson,C Doux,K Eckert,J Elvin-Poole,S Everett,A Ferte,D Gruen,R Gruendl,I Harrison,WG Hartley,K Herner,EM Huff,M Jarvis,N Kuropatkin,PF Leget,N MacCrann,J McCullough,J Myles,A Navarro-Alsina,S Pandey,J Prat,M Raveri,RP Rollins,A Roodman,C Sanchez,LF Secco,I Sevilla-Noarbe,E Sheldon,T Shin,M Troxel,I Tutusaus,TN Varga,B Yanny,B Yin,Y Zhang,Joseph Zuntz,SS Allam,O Alves,M Aguena,D Bacon,E Bertin,D Brooks,DL Burke,A Carnero Rosell,J Carretero,R Cawthon,LN Da Costa,TM Davis,J De Vicente,S Desai,P Doel,J García-Bellido,G Giannini,G Gutierrez,Ismael Ferrero,J Frieman,SR Hinton,DL Hollowood,K Honscheid,DJ James,K Kuehn,O Lahav,JL Marshall,J Mena-Fernández,R Miquel,RLC Ogando,A Palmese,MES Pereira,AA Plazas Malagón,M Rodriguez-Monroy,S Samuroff,E Sanchez,M Schubnell,Mathew Smith,F Sobreira,E Suchyta,MEC Swanson,G Tarle,N Weaverdyck,P Wiseman,DES Collaboration

Journal

Monthly Notices of the Royal Astronomical Society: Letters

Published Date

2024/1

We measure the impact of source galaxy clustering on higher order summary statistics of weak gravitational lensing data. By comparing simulated data with galaxies that either trace or do not trace the underlying density field, we show that this effect can exceed measurement uncertainties for common higher order statistics for certain analysis choices. We evaluate the impact on different weak lensing observables, finding that third moments and wavelet phase harmonics are more affected than peak count statistics. Using Dark Energy Survey (DES) Year 3 (Y3) data, we construct null tests for the source-clustering-free case, finding a p-value of p = 4 × 10−3 (2.6σ) using third-order map moments and p = 3 × 10−11 (6.5σ) using wavelet phase harmonics. The impact of source clustering on cosmological inference can be either included in the model or minimized through ad hoc procedures (e.g. scale cuts). We verify …

Validation of the scientific program for the Dark Energy Spectroscopic Instrument

Authors

AG Adame,J Aguilar,S Ahlen,S Alam,G Aldering,DM Alexander,R Alfarsy,C Allende Prieto,M Alvarez,O Alves,A Anand,F Andrade-Oliveira,E Armengaud,J Asorey,S Avila,A Aviles,S Bailey,A Balaguera-Antolínez,O Ballester,C Baltay,A Bault,J Bautista,J Behera,SF Beltran,S BenZvi,L Beraldo e Silva,JR Bermejo-Climent,A Berti,R Besuner,F Beutler,D Bianchi,C Blake,R Blum,AS Bolton,S Brieden,A Brodzeller,D Brooks,Z Brown,E Buckley-Geer,E Burtin,L Cabayol-Garcia,Z Cai,R Canning,L Cardiel-Sas,A Carnero Rosell,FJ Castander,JL Cervantes-Cota,S Chabanier,E Chaussidon,J Chaves-Montero,S Chen,X Chen,C Chuang,T Claybaugh,S Cole,AP Cooper,A Cuceu,TM Davis,K Dawson,R de Belsunce,R de la Cruz,A de la Macorra,A de Mattia,R Demina,U Demirbozan,J DeRose,A Dey,B Dey,G Dhungana,J Ding,Z Ding,P Doel,R Doshi,K Douglass,A Edge,S Eftekharzadeh,DJ Eisenstein,A Elliott,S Escoffier,P Fagrelius,X Fan,K Fanning,VA Fawcett,S Ferraro,J Ereza,B Flaugher,A Font-Ribera,D Forero-Sánchez,JE Forero-Romero,CS Frenk,BT Gänsicke,LÁ García,J García-Bellido,C Garcia-Quintero,LH Garrison,H Gil-Marín,J Golden-Marx,S Gontcho A Gontcho,AX Gonzalez-Morales,V Gonzalez-Perez,C Gordon,O Graur,D Green,D Gruen,J Guy,B Hadzhiyska,C Hahn,JJ Han,MM S Hanif,HK Herrera-Alcantar,K Honscheid,J Hou,C Howlett,D Huterer,V Iršič,M Ishak,A Jana,L Jiang,J Jimenez,YP Jing,S Joudaki,E Jullo,R Joyce,S Juneau,N Kizhuprakkat,NG Karaçaylı,T Karim,R Kehoe,S Kent,A Khederlarian,S Kim,D Kirkby,T Kisner,F Kitaura,J Kneib,SE Koposov,A Kovács,A Kremin,A Krolewski,B L’Huillier,O Lahav,A Lambert,C Lamman,T-W Lan,M Landriau,D Lang,JU Lange,J Lasker,L Le Guillou,A Leauthaud

Journal

The Astronomical Journal

Published Date

2024/1/15

Studies of the geometry and energy content of the Universe, physics of cosmic expansion, fundamental properties of standard model particles, and growth of structure remain the key focus of cosmology studies. Early measurements of cosmic expansion history using Type Ia supernovae (SNe Ia) helped to constrain the energy content, providing the first evidence for cosmic acceleration that could be explained by a form of dark energy (Riess et al. 1998; Perlmutter et al. 1999). Subsequent SNe Ia studies (eg, Suzuki et al. 2012; Betoule et al. 2014; Scolnic et al. 2018) were able to constrain the equation of state for dark energy to a precision of roughly 4% when combined with cosmic microwave background (CMB) measurements from the Planck satellite (Planck Collaboration et al. 2011), consistent with a ΛCDM model where dark energy can be explained by a cosmological constant. Under this assumption of a flat …

The Dark Energy Survey Supernova Program: Cosmological Biases from Host Galaxy Mismatch of Type Ia Supernovae

Authors

Maria Vincenzi,M Sullivan,A Möller,P Armstrong,BA Bassett,D Brout,D Carollo,A Carr,Tamara M Davis,C Frohmaier,Lluís Galbany,K Glazebrook,Or Graur,L Kelsey,R Kessler,E Kovacs,Geraint F Lewis,C Lidman,U Malik,Robert C Nichol,B Popovic,M Sako,D Scolnic,Mathew Smith,G Taylor,BE Tucker,P Wiseman,Michel Aguena,Sahar Allam,J Annis,Jacobo Asorey,D Bacon,E Bertin,D Brooks,DL Burke,A Carnero Rosell,J Carretero,FJ Castander,M Costanzi,Luiz N da Costa,Maria Elidaiana da Silva Pereira,J De Vicente,S Desai,HT Diehl,P Doel,S Everett,Ismael Ferrero,B Flaugher,Pablo Fosalba,J Frieman,J García-Bellido,David W Gerdes,D Gruen,G Gutierrez,Samuel R Hinton,Devon L Hollowood,K Honscheid,DJ James,K Kuehn,N Kuropatkin,Ofer Lahav,TS Li,M Lima,Marcio AG Maia,Jennifer L Marshall,R Miquel,R Morgan,Ricardo LC Ogando,A Palmese,Francisco Paz-Chinchón,A Pieres,AA Plazas Malagón,K Reil,A Roodman,E Sanchez,M Schubnell,S Serrano,Ignacio Sevilla-Noarbe,Eric Suchyta,G Tarle,C To,Tamas Norbert Varga,Jochen Weller,RD Wilkinson,(DES Collaboration)

Journal

Monthly Notices of the Royal Astronomical Society

Published Date

2023/1

Cosmological analyses of samples of photometrically identified type Ia supernovae (SNe Ia) depend on understanding the effects of ‘contamination’ from core-collapse and peculiar SN Ia events. We employ a rigorous analysis using the photometric classifier SuperNNova on state-of-the-art simulations of SN samples to determine cosmological biases due to such ‘non-Ia’ contamination in the Dark Energy Survey (DES) 5-yr SN sample. Depending on the non-Ia SN models used in the SuperNNova training and testing samples, contamination ranges from 0.8 to 3.5 per cent, with a classification efficiency of 97.7–99.5 per cent. Using the Bayesian Estimation Applied to Multiple Species (BEAMS) framework and its extension BBC (‘BEAMS with Bias Correction’), we produce a redshift-binned Hubble diagram marginalized over contamination and corrected for selection effects, and use it to constrain the dark …

The Dark Energy Survey 5-year photometrically classified type Ia supernovae without host-galaxy redshifts

Authors

A Möller,P Wiseman,M Smith,C Lidman,TM Davis,R Kessler,M Sako,M Sullivan,L Galbany,J Lee,RC Nichol,BO Sánchez,BE Tucker,TMC Abbott,M Aguena,S Allam,O Alves,F Andrade-Oliveira,D Bacon,E Bertin,D Brooks,A Carnero Rosell,FJ Castander,S Desai,HT Diehl,S Everett,I Ferrero,D Friedel,J Frieman,J García-Bellido,E Gaztanaga,G Giannini,RA Gruendl,G Gutierrez,SR Hinton,DL Hollowood,K Honscheid,DJ James,K Kuehn,O Lahav,S Lee,JL Marshall,J Mena-Fernández,F Menanteau,R Miquel,J Myles,RLC Ogando,A Palmese,A Pieres,AA Malagón,A Roodman,E Sanchez,D Sanchez Cid,I Sevilla-Noarbe,E Suchyta,MEC Swanson,G Tarle,DL Tucker,M Vincenzi,AR Walker,N Weaverdyck,LN da Costa,MES Pereira

Journal

arXiv preprint arXiv:2402.18690

Published Date

2024/2/28

Current and future Type Ia Supernova (SN Ia) surveys will need to adopt new approaches to classifying SNe and obtaining their redshifts without spectra if they wish to reach their full potential. We present here a novel approach that uses only photometry to identify SNe Ia in the 5-year Dark Energy Survey (DES) dataset using the SUPERNNOVA classifier. Our approach, which does not rely on any information from the SN host-galaxy, recovers SNe Ia that might otherwise be lost due to a lack of an identifiable host. We select 2,298 high-quality SNe Ia from the DES 5-year dataset. More than 700 of these have no spectroscopic host redshift and are potentially new SNIa compared to the DES-SN5YR cosmology analysis. To analyse these SNe Ia, we derive their redshifts and properties using only their light-curves with a modified version of the SALT2 light-curve fitter. Compared to other DES SN Ia samples with spectroscopic redshifts, our new sample has in average higher redshift, bluer and broader light-curves, and fainter host-galaxies. Future surveys such as LSST will also face an additional challenge, the scarcity of spectroscopic resources for follow-up. When applying our novel method to DES data, we reduce the need for follow-up by a factor of four and three for host-galaxy and live SN respectively compared to earlier approaches. Our novel method thus leads to better optimisation of spectroscopic resources for follow-up.

Characterizing the intracluster light over the redshift range 0.2 < z < 0.8 in the DES-ACT overlap

Authors

Jesse B Golden-Marx,Y Zhang,RLC Ogando,S Allam,DL Tucker,CJ Miller,M Hilton,B Mutlu-Pakdil,TMC Abbott,M Aguena,O Alves,F Andrade-Oliveira,J Annis,D Bacon,E Bertin,S Bocquet,D Brooks,DL Burke,A Carnero Rosell,M Carrasco Kind,FJ Castander,C Conselice,M Costanzi,LN da Costa,MES Pereira,J De Vicente,S Desai,P Doel,S Everett,Ismael Ferrero,B Flaugher,J Frieman,J García-Bellido,DW Gerdes,D Gruen,RA Gruendl,G Gutierrez,SR Hinton,DL Hollowood,K Honscheid,DJ James,K Kuehn,N Kuropatkin,O Lahav,JL Marshall,P Melchior,J Mena-Fernández,R Miquel,JJ Mohr,A Palmese,F Paz-Chinchón,A Pieres,AA Plazas Malagón,J Prat,M Raveri,M Rodriguez-Monroy,AK Romer,E Sanchez,V Scarpine,I Sevilla-Noarbe,C Sifón,M Smith,E Suchyta,MEC Swanson,G Tarle,M Vincenzi,N Weaverdyck,B Yanny,(DES Collaboration)

Journal

Monthly Notices of the Royal Astronomical Society

Published Date

2023/5

We characterize the properties and evolution of bright central galaxies (BCGs) and the surrounding intracluster light (ICL) in galaxy clusters identified in the Dark Energy Survey and Atacama Cosmology Telescope Survey (DES-ACT) overlapping regions, covering the redshift range 0.20 < z < 0.80. Over this redshift range, we measure no change in the ICL’s stellar content (between 50 and 300 kpc) in clusters with log10(M200m,SZ/M⊙) >14.4. We also measure the stellar mass–halo mass (SMHM) relation for the BCG+ICL system and find that the slope, β, which characterizes the dependence of M200m,SZ on the BCG+ICL stellar mass, increases with radius. The outskirts are more strongly correlated with the halo than the core, which supports that the BCG+ICL system follows a two-phase growth, where recent growth (z < 2) occurs beyond the BCG’s core. Additionally, we compare our observed SMHM relation …

A quantum-enhanced support vector machine for galaxy classification

Authors

Mohammad Hassan Hassanshahi,Marcin Jastrzebski,Sarah Malik,Ofer Lahav

Journal

RAS Techniques and Instruments

Published Date

2023/1

Galaxy morphology, a key tracer of the evolution of a galaxy’s physical structure, has motivated extensive research on machine learning techniques for efficient and accurate galaxy classification. The emergence of quantum computers has generated optimism about the potential for significantly improving the accuracy of such classifications by leveraging the large dimensionality of quantum Hilbert space. This paper presents a quantum-enhanced support vector machine (SVM) algorithm for classifying galaxies based on their morphology. The algorithm requires the computation of a kernel matrix, a task that is performed on a simulated quantum computer using a quantum circuit conjectured to be intractable on classical computers. The result shows similar performance between classical and quantum-enhanced SVM algorithms. For a training size of 40k, the receiver operating characteristic curve for differentiating …

Mapping gas around massive galaxies: cross-correlation of DES Y3 galaxies and Compton-y maps from SPT and Planck

Authors

J Sánchez,Y Omori,C Chang,LE Bleem,T Crawford,A Drlica-Wagner,S Raghunathan,G Zacharegkas,TMC Abbott,M Aguena,A Alarcon,S Allam,O Alves,A Amon,S Avila,E Baxter,K Bechtol,BA Benson,GM Bernstein,E Bertin,S Bocquet,D Brooks,DL Burke,A Campos,JE Carlstrom,A Carnero Rosell,M Carrasco Kind,J Carretero,FJ Castander,R Cawthon,CL Chang,A Chen,A Choi,R Chown,M Costanzi,AT Crites,M Crocce,LN da Costa,MES Pereira,T de Haan,J De Vicente,J DeRose,S Desai,HT Diehl,MA Dobbs,S Dodelson,P Doel,J Elvin-Poole,W Everett,S Everett,Ismael Ferrero,B Flaugher,P Fosalba,J Frieman,J García-Bellido,M Gatti,EM George,DW Gerdes,G Giannini,D Gruen,RA Gruendl,J Gschwend,G Gutierrez,NW Halverson,SR Hinton,GP Holder,DL Hollowood,WL Holzapfel,K Honscheid,JD Hrubes,DJ James,L Knox,K Kuehn,N Kuropatkin,O Lahav,AT Lee,D Luong-Van,N MacCrann,JL Marshall,J McCullough,JJ McMahon,P Melchior,J Mena-Fernández,F Menanteau,R Miquel,L Mocanu,JJ Mohr,J Muir,J Myles,T Natoli,S Padin,A Palmese,S Pandey,F Paz-Chinchón,A Pieres,AA Plazas Malagón,A Porredon,C Pryke,M Raveri,CL Reichardt,M Rodriguez-Monroy,AJ Ross,JE Ruhl,E Rykoff,C Sánchez,E Sanchez,V Scarpine,KK Schaffer,I Sevilla-Noarbe,E Sheldon,E Shirokoff,M Smith,M Soares-Santos,Z Staniszewski,AA Stark,E Suchyta,Molly EC Swanson,G Tarle,D Thomas,MA Troxel,DL Tucker,JD Vieira,M Vincenzi,N Weaverdyck,R Williamson,B Yanny,B Yin,(DES Collaborations) SPT

Journal

Monthly Notices of the Royal Astronomical Society

Published Date

2023/6

We cross-correlate positions of galaxies measured in data from the first three years of the Dark Energy Survey with Compton-y maps generated using data from the South Pole Telescope (SPT) and the Planck mission. We model this cross-correlation measurement together with the galaxy autocorrelation to constrain the distribution of gas in the Universe. We measure the hydrostatic mass bias or, equivalently, the mean halo bias-weighted electron pressure <bhPe >, using large-scale information. We find <bhPe > to be $[0.16^{+0.03}_{-0.04},0.28^{+0.04}_{-0.05},0.45^{+0.06}_{-0.10},0.54^{+0.08}_{-0.07},0.61^{+0.08}_{-0.06},0.63^{+0.07}_{-0.08}]$ meV cm−3 at redshifts z ∼ [0.30, 0.46, 0.62, 0.77, 0.89, 0.97]. These values are consistent with previous work where measurements exist in the redshift range. We also constrain the mean gas profile using small-scale information, enabled by the high-resolution of the …

DES Y3+ KiDS-1000: Consistent cosmology combining cosmic shear surveys

Authors

TMC Abbott,M Aguena,A Alarcon,O Alves,A Amon,F Andrade-Oliveira,M Asgari,S Avila,D Bacon,K Bechtol,MR Becker,Gary M Bernstein,E Bertin,M Bilicki,J Blazek,S Bocquet,D Brooks,P Burger,DL Burke,H Camacho,A Campos,A Carnero Rosell,M Carrasco Kind,J Carretero,Francisco Javier Castander,R Cawthon,C Chang,R Chen,A Choi,C Conselice,J Cordero,M Crocce,Luiz N da Costa,Maria Elidaiana da Silva Pereira,R Dalal,C Davis,JTA de Jong,J DeRose,S Desai,HT Diehl,S Dodelson,P Doel,C Doux,A Drlica-Wagner,A Dvornik,K Eckert,TF Eifler,J Elvin-Poole,S Everett,X Fang,Ismael Ferrero,A Ferté,B Flaugher,O Friedrich,J Frieman,J García-Bellido,M Gatti,G Giannini,B Giblin,D Gruen,Robert A Gruendl,G Gutierrez,I Harrison,WG Hartley,K Herner,C Heymans,H Hildebrandt,SR Hinton,Henk Hoekstra,Devon L Hollowood,K Honscheid,H Huang,EM Huff,Dragan Huterer,DJ James,M Jarvis,N Jeffrey,T Jeltema,B Joachimi,S Joudaki,A Kannawadi,E Krause,K Kuehn,Konrad Kuijken,N Kuropatkin,Ofer Lahav,P-F Leget,P Lemos,S-S Li,X Li,AR Liddle,M Lima,C-A Lin,H Lin,N MacCrann,C Mahony,JL Marshall,J McCullough,J Mena-Fernández,F Menanteau,R Miquel,JJ Mohr,J Muir,J Myles,N Napolitano,A Navarro-Alsina,RLC Ogando,A Palmese,S Pandey,Y Park,M Paterno,JA Peacock,D Petravick,A Pieres,AA Plazas Malagón,A Porredon,J Prat,M Radovich,M Raveri,R Reischke,NC Robertson,RP Rollins,AK Romer,A Roodman,Eli S Rykoff,S Samuroff,C Sánchez,E Sanchez,J Sanchez,Peter Schneider,Lucas Frozza Secco,I Sevilla-Noarbe,H-Y Shan,E Sheldon,T Shin,C Sifón,M Smith,M Soares-Santos,B Stölzner,E Suchyta,MEC Swanson,Gregory Tarlé,D Thomas,C To,MA Troxel,T Tröster,I Tutusaus,JL van den Busch,Tamas Norbert Varga,AR Walker

Journal

The Open Journal of Astrophysics

Published Date

2023/10/20

We present a joint cosmic shear analysis of the Dark Energy Survey (DES Y3) and the Kilo-Degree Survey (KiDS-1000) in a collaborative effort between the two survey teams. We find consistent cosmological parameter constraints between DES Y3 and KiDS-1000 which, when combined in a joint-survey analysis, constrain the parameter ????8= ????8√ ︁Ωm/0.3 with a mean value of 0.790+ 0.018

Euclid: Calibrating photometric redshifts with spectroscopic cross-correlations

Authors

K Naidoo,H Johnston,B Joachimi,JL Van Den Busch,H Hildebrandt,O Ilbert,O Lahav,N Aghanim,B Altieri,A Amara,M Baldi,R Bender,C Bodendorf,E Branchini,Massimo Brescia,J Brinchmann,S Camera,V Capobianco,C Carbone,J Carretero,FJ Castander,M Castellano,Stefano Cavuoti,A Cimatti,R Cledassou,G Congedo,CJ Conselice,L Conversi,Y Copin,L Corcione,F Courbin,M Cropper,A Da Silva,H Degaudenzi,J Dinis,F Dubath,X Dupac,S Dusini,S Farrens,S Ferriol,P Fosalba,M Frailis,E Franceschi,P Franzetti,M Fumana,S Galeotta,B Garilli,W Gillard,B Gillis,C Giocoli,A Grazian,F Grupp,Stein Vidar Hagfors Haugan,W Holmes,F Hormuth,A Hornstrup,K Jahnke,M Kümmel,A Kiessling,M Kilbinger,T Kitching,R Kohley,Hannu Kurki-Suonio,S Ligori,Per Barth Lilje,I Lloro,E Maiorano,O Mansutti,O Marggraf,K Markovic,F Marulli,Richard Massey,S Maurogordato,M Meneghetti,E Merlin,G Meylan,M Moresco,L Moscardini,E Munari,R Nakajima,SM Niemi,C Padilla,S Paltani,F Pasian,K Pedersen,WJ Percival,V Pettorino,S Pires,G Polenta,M Poncet,L Popa,L Pozzetti,F Raison,R Rebolo,A Renzi,J Rhodes,G Riccio,E Romelli,C Rosset,E Rossetti,R Saglia,D Sapone,B Sartoris,P Schneider,A Secroun,G Seidel,C Sirignano,G Sirri,J-L Starck,C Surace,P Tallada-Crespí,AN Taylor,I Tereno,R Toledo-Moreo,F Torradeflot,I Tutusaus,EA Valentijn,L Valenziano,T Vassallo,Y Wang,J Weller,M Wetzstein,A Zacchei,G Zamorani,J Zoubian,S Andreon,D Maino,V Scottez,AH Wright

Journal

Astronomy & Astrophysics

Published Date

2023/2/1

Cosmological constraints from key probes of the Euclid imaging survey rely critically on the accurate determination of the true redshift distributions, n(z), of tomographic redshift bins. We determine whether the mean redshift, ⟨z⟩, of ten Euclid tomographic redshift bins can be calibrated to the Euclid target uncertainties of σ(⟨z⟩) < 0.002 (1 + z) via cross-correlation, with spectroscopic samples akin to those from the Baryon Oscillation Spectroscopic Survey (BOSS), Dark Energy Spectroscopic Instrument (DESI), and Euclid’s NISP spectroscopic survey. We construct mock Euclid and spectroscopic galaxy samples from the Flagship simulation and measure small-scale clustering redshifts up to redshift z < 1.8 with an algorithm that performs well on current galaxy survey data. The clustering measurements are then fitted to two n(z) models: one is the true n(z) with a free mean; the other a Gaussian process …

Dark Energy Survey Year 3 results: Constraints on extensions to with weak lensing and galaxy clustering

Authors

TMC Abbott,M Aguena,A Alarcon,O Alves,A Amon,F Andrade-Oliveira,J Annis,S Avila,D Bacon,E Baxter,K Bechtol,MR Becker,GM Bernstein,S Birrer,J Blazek,S Bocquet,A Brandao-Souza,SL Bridle,D Brooks,DL Burke,H Camacho,A Campos,A Carnero Rosell,M Carrasco Kind,J Carretero,FJ Castander,R Cawthon,C Chang,A Chen,R Chen,A Choi,C Conselice,J Cordero,M Costanzi,M Crocce,LN Da Costa,MES Pereira,C Davis,TM Davis,J DeRose,S Desai,E Di Valentino,HT Diehl,S Dodelson,P Doel,C Doux,A Drlica-Wagner,K Eckert,TF Eifler,F Elsner,J Elvin-Poole,S Everett,X Fang,A Farahi,Ismael Ferrero,A Ferté,B Flaugher,P Fosalba,D Friedel,O Friedrich,J Frieman,J García-Bellido,M Gatti,L Giani,T Giannantonio,G Giannini,D Gruen,RA Gruendl,J Gschwend,G Gutierrez,N Hamaus,I Harrison,WG Hartley,K Herner,SR Hinton,DL Hollowood,K Honscheid,H Huang,EM Huff,D Huterer,B Jain,DJ James,M Jarvis,N Jeffrey,T Jeltema,A Kovacs,E Krause,K Kuehn,N Kuropatkin,O Lahav,S Lee,P-F Leget,P Lemos,CD Leonard,AR Liddle,M Lima,H Lin,N MacCrann,JL Marshall,J McCullough,J Mena-Fernández,F Menanteau,R Miquel,V Miranda,JJ Mohr,J Muir,J Myles,S Nadathur,A Navarro-Alsina,RC Nichol,RLC Ogando,Y Omori,A Palmese,S Pandey,Y Park,M Paterno,F Paz-Chinchón,WJ Percival,A Pieres,AA Plazas Malagón,A Porredon,J Prat,M Raveri,M Rodriguez-Monroy,P Rogozenski,RP Rollins,AK Romer,A Roodman,R Rosenfeld,AJ Ross,ES Rykoff,S Samuroff,C Sánchez,E Sanchez,J Sanchez,D Sanchez Cid,V Scarpine,D Scolnic,LF Secco,I Sevilla-Noarbe,E Sheldon,T Shin,M Smith,M Soares-Santos,E Suchyta,M Tabbutt,G Tarle,D Thomas,C To,A Troja

Journal

Physical Review D

Published Date

2023/4/5

We constrain six possible extensions to the Λ cold dark matter (CDM) model using measurements from the Dark Energy Survey’s first three years of observations, alone and in combination with external cosmological probes. The DES data are the two-point correlation functions of weak gravitational lensing, galaxy clustering, and their cross-correlation. We use simulated data vectors and blind analyses of real data to validate the robustness of our results to astrophysical and modeling systematic errors. In many cases, constraining power is limited by the absence of theoretical predictions beyond the linear regime that are reliable at our required precision. The Λ CDM extensions are dark energy with a time-dependent equation of state, nonzero spatial curvature, additional relativistic degrees of freedom, sterile neutrinos with eV-scale mass, modifications of gravitational physics, and a binned σ 8 (z) model which serves …

The Social Value of Dark Energy

Authors

Avner Offer,Ofer Lahav

Journal

arXiv preprint arXiv:2305.17982

Published Date

2023/5/29

Astrophysics is a social enterprise exemplified here by the Dark Energy Survey (DES) which completed its fieldwork in 2019 after 16 years of preparation and observation, while data analysis continues. Society funds astrophysics on a grand scale. For human capital and for governance the discipline draws on a self-governing "republic of science", while the funds were provided by philanthropists in the past, and by governments today. The benefits accrue initially to scientists themselves, in the form of a rewarding vocation. For the social benefit it is tempting to apply formal cost benefit analysis, but that approach ignores the option value of science and imposes questionable assumptions from welfare economics. Astrophysics generates some useful spinoffs, offers attractive careers, appeals to the popular imagination, speaks to metaphysical cravings and constitutes a good in itself. The rise of AI also suggests a role in exploring future habitats for intelligence and cognition.

LSTM and CNN application for core-collapse supernova search in gravitational wave real data

Authors

Alberto Iess,Elena Cuoco,Filip Morawski,Constantina Nicolaou,Ofer Lahav

Journal

Astronomy & Astrophysics

Published Date

2023/1/1

Context Core-collapse supernovae (CCSNe) are expected to emit gravitational wave signals that could be detected by current and future generation interferometers within the Milky Way and nearby galaxies. The stochastic nature of the signal arising from CCSNe requires alternative detection methods to matched filtering.Aims We aim to show the potential of machine learning (ML) for multi-label classification of different CCSNe simulated signals and noise transients using real data. We compared the performance of 1D and 2D convolutional neural networks (CNNs) on single and multiple detector data. For the first time, we tested multi-label classification also with long short-term memory (LSTM) networks.Methods We applied a search and classification procedure for CCSNe signals, using an event trigger generator, the Wavelet Detection Filter (WDF), coupled with ML. We used time series and time-frequency …

The PSZ-MCMF catalogue of Planck clusters over the DES region

Authors

D Hernández-Lang,M Klein,JJ Mohr,S Grandis,JB Melin,P Tarrío,M Arnaud,GW Pratt,TMC Abbott,M Aguena,O Alves,F Andrade-Oliveira,D Bacon,E Bertin,D Brooks,DL Burke,A Carnero Rosell,M Carrasco Kind,J Carretero,FJ Castander,M Costanzi,LN Da Costa,MES Pereira,S Desai,HT Diehl,P Doel,S Everett,Ismael Ferrero,B Flaugher,J Frieman,J García-Bellido,D Gruen,RA Gruendl,J Gschwend,G Gutierrez,SR Hinton,DL Hollowood,K Honscheid,DJ James,K Kuehn,N Kuropatkin,O Lahav,C Lidman,P Melchior,J Mena-Fernández,F Menanteau,R Miquel,A Palmese,F Paz-Chinchón,A Pieres,AA Plazas Malagón,M Raveri,M Rodriguez-Monroy,AK Romer,V Scarpine,I Sevilla-Noarbe,M Smith,E Suchyta,G Tarle,D Thomas,N Weaverdyck,(DES Collaboration)

Journal

Monthly Notices of the Royal Astronomical Society

Published Date

2023/10

We present the first systematic follow-up of Planck Sunyaev–Zeldovich effect (SZE) selected candidates down to signal-to-noise (S/N) of 3 over the 5000 deg2 covered by the Dark Energy Survey. Using the MCMF cluster confirmation algorithm, we identify optical counterparts, determine photometric redshifts, and richnesses and assign a parameter, fcont, that reflects the probability that each SZE-optical pairing represents a random superposition of physically unassociated systems rather than a real cluster. The new PSZ-MCMF cluster catalogue consists of 853 MCMF confirmed clusters and has a purity of 90 per cent. We present the properties of subsamples of the PSZ-MCMF catalogue that have purities ranging from 90 per cent to 97.5 per cent, depending on the adopted fcont threshold. Halo mass estimates M500, redshifts, richnesses, and optical centres are presented for all PSZ-MCMF clusters. The PSZ …

Beyond the 3rd moment: a practical study of using lensing convergence CDFs for cosmology with DES Y3

Authors

D Anbajagane,C Chang,A Banerjee,T Abel,M Gatti,V Ajani,A Alarcon,A Amon,EJ Baxter,K Bechtol,MR Becker,GM Bernstein,A Campos,A Carnero Rosell,M Carrasco Kind,R Chen,A Choi,C Davis,J DeRose,HT Diehl,S Dodelson,C Doux,A Drlica-Wagner,K Eckert,J Elvin-Poole,S Everett,A Ferté,D Gruen,RA Gruendl,I Harrison,WG Hartley,EM Huff,B Jain,M Jarvis,N Jeffrey,T Kacprzak,N Kokron,N Kuropatkin,PF Leget,N MacCrann,J McCullough,J Myles,A Navarro-Alsina,S Pandey,J Prat,M Raveri,RP Rollins,A Roodman,ES Rykoff,C Sánchez,LF Secco,I Sevilla-Noarbe,E Sheldon,T Shin,MA Troxel,I Tutusaus,L Whiteway,B Yanny,B Yin,Y Zhang,TMC Abbott,S Allam,M Aguena,O Alves,F Andrade-Oliveira,J Annis,D Bacon,J Blazek,D Brooks,R Cawthon,LN da Costa,MES Pereira,TM Davis,S Desai,P Doel,Ismael Ferrero,J Frieman,G Giannini,G Gutierrez,SR Hinton,DL Hollowood,K Honscheid,DJ James,K Kuehn,O Lahav,JL Marshall,J Mena-Fernández,F Menanteau,R Miquel,A Palmese,A Pieres,AA Plazas Malagón,K Reil,E Sanchez,Mathew Smith,MEC Swanson,G Tarle,Philip Wiseman,(DES Collaboration)

Journal

Monthly Notices of the Royal Astronomical Society

Published Date

2023/12

Widefield surveys probe clustered scalar fields – such as galaxy counts, lensing potential, etc. – which are sensitive to different cosmological and astrophysical processes. Constraining such processes depends on the statistics that summarize the field. We explore the cumulative distribution function (CDF) as a summary of the galaxy lensing convergence field. Using a suite of N-body light-cone simulations, we show the CDFs’ constraining power is modestly better than the second and third moments, as CDFs approximately capture information from all moments. We study the practical aspects of applying CDFs to data, using the Dark Energy Survey (DES Y3) data as an example, and compute the impact of different systematics on the CDFs. The contributions from the point spread function and reduced shear approximation are of the total signal. Source clustering effects and baryon imprints contribute …

The impact of weak lensing on Type Ia supernovae luminosity distances

Authors

Paul Shah,Pablo Lemos,Ofer Lahav

Journal

Monthly Notices of the Royal Astronomical Society: Letters

Published Date

2023/3

When Type Ia supernovae are used to infer cosmological parameters, their luminosities are compared to those from a homogeneous cosmology. In this note, we propose a test to examine to what degree SN Ia have been observed on lines of sight where the average matter density is not representative of the homogeneous background. We apply our test to the Pantheon SN Ia compilation, and find two redshift bins which indicate a moderate bias to over-density at ∼2σ. We modify the Tripp estimator to explicitly de-lens SN Ia magnitudes, and show that this reduces scatter of Hubble diagram residuals. Using our revised Tripp estimator, the effect on cosmological parameters from Pantheon in ΛCDM is however small with a change in mean value from Ωm = 0.317 ± 0.027 (baseline) to Ωm = 0.312 ± 0.025 (de-lensed). For the Flat wCDM case, it is Ωm = 0.332 ± 0.049 and w = −1.16 ± 0.16 (baseline) versus Ωm = 0 …

Building an Efficient Cluster Cosmology Software Package for Modeling Cluster Counts and Lensing

Authors

M Aguena,O Alves,J Annis,D Bacon,S Bocquet,D Brooks,A Carnero Rosell,C Chang,M Costanzi,C Coviello,LN Da Costa,TM Davis,J De Vicente,HT Diehl,P Doel,J Esteves,S Everett,I Ferrero,A Ferté,D Friedel,J Frieman,M Gatti,G Giannini,D Gruen,RA Gruendl,G Gutierrez,K Herner,SR Hinton,DL Hollowood,K Honscheid,DJ James,T Jeltema,M Kirby,K Kuehn,O Lahav,P Li,JL Marshall,T McClintock,D Mellor,J Mena-Fernández,R Miquel,J O'Donnell,A Palmese,M Paterno,MES Pereira,A Pieres,AA Malagón,M Rodriguez-Monroy,AK Romer,A Roodman,E Sanchez,M Schubnell,I Sevilla-Noarbe,T Shin,M Smith,E Suchyta,MEC Swanson,G Tarle,J Weller,P Wiseman,H-Y Wu,Y Zhang,C Zhou

Journal

arXiv preprint arXiv:2309.06593

Published Date

2023/9/12

We introduce a software suite developed for galaxy cluster cosmological analysis with the Dark Energy Survey Data. Cosmological analyses based on galaxy cluster number counts and weak-lensing measurements need efficient software infrastructure to explore an increasingly large parameter space, and account for various cosmological and astrophysical effects. Our software package is designed to model the cluster observables in a wide-field optical survey, including galaxy cluster counts, their averaged weak-lensing masses, or the cluster's averaged weak-lensing radial signals. To ensure maximum efficiency, this software package is developed in C++ in the CosmoSIS software framework, making use of the CUBA integration library. We also implement a testing and validation scheme to ensure the quality of the package. We demonstrate the effectiveness of this development by applying the software to the Dark Energy Survey Year 1 galaxy cluster cosmological data sets, and acquired cosmological constraints that are consistent with the fiducial Dark Energy Survey analysis.

Constraining the baryonic feedback with cosmic shear using the DES Year-3 small-scale measurements

Authors

A Chen,G Aricò,D Huterer,RE Angulo,N Weaverdyck,O Friedrich,LF Secco,C Hernández-Monteagudo,A Alarcon,O Alves,A Amon,F Andrade-Oliveira,E Baxter,K Bechtol,MR Becker,GM Bernstein,J Blazek,A Brandao-Souza,SL Bridle,H Camacho,A Campos,A Carnero Rosell,M Carrasco Kind,R Cawthon,C Chang,R Chen,P Chintalapati,A Choi,J Cordero,M Crocce,MES Pereira,C Davis,J DeRose,E Di Valentino,HT Diehl,S Dodelson,C Doux,A Drlica-Wagner,K Eckert,TF Eifler,F Elsner,J Elvin-Poole,S Everett,X Fang,A Ferté,P Fosalba,M Gatti,E Gaztanaga,G Giannini,D Gruen,RA Gruendl,I Harrison,WG Hartley,K Herner,K Hoffmann,H Huang,EM Huff,B Jain,M Jarvis,N Jeffrey,T Kacprzak,E Krause,N Kuropatkin,PF Leget,P Lemos,AR Liddle,N MacCrann,J McCullough,J Muir,J Myles,A Navarro-Alsina,Y Omori,S Pandey,Y Park,A Porredon,J Prat,M Raveri,A Refregier,RP Rollins,A Roodman,R Rosenfeld,AJ Ross,ES Rykoff,S Samuroff,C Sánchez,J Sanchez,I Sevilla-Noarbe,E Sheldon,T Shin,A Troja,M A Troxel,I Tutusaus,TN Varga,RH Wechsler,B Yanny,B Yin,Y Zhang,J Zuntz,M Aguena,J Annis,D Bacon,E Bertin,S Bocquet,D Brooks,DL Burke,J Carretero,C Conselice,M Costanzi,LN da Costa,J De Vicente,S Desai,P Doel,I Ferrero,B Flaugher,J Frieman,J García-Bellido,DW Gerdes,T Giannantonio,J Gschwend,G Gutierrez,SR Hinton,DL Hollowood,K Honscheid,DJ James,K Kuehn,O Lahav,M March,JL Marshall,P Melchior,F Menanteau,R Miquel,JJ Mohr,R Morgan,F Paz-Chinchón,A Pieres,E Sanchez,M Smith,E Suchyta,MEC Swanson,G Tarle,D Thomas,C To,(DES Collaboration)

Journal

Monthly Notices of the Royal Astronomical Society

Published Date

2023/2

We use the small scales of the Dark Energy Survey (DES) Year-3 cosmic shear measurements, which are excluded from the DES Year-3 cosmological analysis, to constrain the baryonic feedback. To model the baryonic feedback, we adopt a baryonic correction model and use the numerical package baccoemu to accelerate the evaluation of the baryonic non-linear matter power spectrum. We design our analysis pipeline to focus on the constraints of the baryonic suppression effects, utilizing the implication given by a principal component analysis on the Fisher forecasts. Our constraint on the baryonic effects can then be used to better model and ameliorate the effects of baryons in producing cosmological constraints from the next-generation large-scale structure surveys. We detect the baryonic suppression on the cosmic shear measurements with a ∼2σ significance. The characteristic halo mass for which half of the gas is ejected …

The entropy of galaxy spectra: how much information is encoded?

Authors

Ignacio Ferreras,Ofer Lahav,Rachel S Somerville,Joseph Silk

Journal

RAS Techniques and Instruments

Published Date

2023/1

The inverse problem of extracting the stellar population content of galaxy spectra is analysed here from a basic standpoint based on information theory. By interpreting spectra as probability distribution functions, we find that galaxy spectra have high entropy, thus leading to a rather low effective information content. The highest variation in entropy is unsurprisingly found in regions that have been well studied for decades with the conventional approach. We target a set of six spectral regions that show the highest variation in entropy – the 4000 Å break being the most informative one. As a test case with real data, we measure the entropy of a set of high-quality spectra from the Sloan Digital Sky Survey, and contrast entropy-based results with the traditional method based on line strengths. The data are classified into star-forming (SF), quiescent (Q), and active galactic nucleus (AGN) galaxies, and show …

Cool Cores in Clusters of Galaxies in the Dark Energy Survey

Authors

K Graham,J O’Donnell,MM Silverstein,O Eiger,TE Jeltema,DL Hollowood,D Cross,S Everett,P Giles,J Jobel,D Laubner,A McDaniel,AK Romer,A Swart,M Aguena,S Allam,O Alves,D Brooks,M Carrasco Kind,J Carretero,M Costanzi,LN da Costa,MES Pereira,J De Vicente,S Desai,JP Dietrich,P Doel,I Ferrero,J Frieman,J García-Bellido,D Gruen,RA Gruendl,SR Hinton,K Honscheid,DJ James,K Kuehn,N Kuropatkin,O Lahav,JL Marshall,P Melchior,J Mena-Fernández,F Menanteau,R Miquel,RLC Ogando,A Palmese,A Pieres,AA Plazas Malagón,K Reil,M Rodriguez-Monroy,E Sanchez,V Scarpine,M Schubnell,M Smith,E Suchyta,G Tarle,C To,N Weaverdyck,(DES Collaboration)

Journal

Research Notes of the AAS

Published Date

2023/5/5

We search for the presence of cool cores in optically selected galaxy clusters from the Dark Energy Survey (DES) and investigate their prevalence as a function of redshift and cluster richness. Clusters were selected from the redMaPPer analysis of three years of DES observations that have archival Chandra X-ray observations, giving a sample of 99 clusters with a redshift range of 0.11 < z < 0.87 and a richness range of 25 < λ < 207. Using the X-ray data, the core temperature was compared to the outer temperature to identify clusters where the core temperature is a factor of 0.7 or less than the outer temperature. We found a cool core fraction of approximately 20% with no significant trend in the cool core fraction with either redshift or richness.

Galaxy Clusters Discovered via the Thermal Sunyaev-Zel'dovich Effect in the 500-square-degree SPTpol Survey

Authors

LE Bleem,M Klein,TMC Abbott,PAR Ade,M Aguena,O Alves,AJ Anderson,F Andrade-Oliveira,B Ansarinejad,M Archipley,MLN Ashby,JE Austermann,D Bacon,JA Beall,AN Bender,BA Benson,F Bianchini,S Bocquet,D Brooks,DL Burke,M Calzadilla,JE Carlstrom,A Carnero Rosell,J Carretero,CL Chang,P Chaubal,HC Chiang,TL Chou,R Citron,C Corbett Moran,M Costanzi,TM Crawford,AT Crites,LN da Costa,T de Haan,J De Vicente,S Desai,MA Dobbs,P Doel,W Everett,I Ferrero,B Flaugher,B Floyd,D Friedel,J Frieman,J Gallicchio,J Garc'ia-Bellido,M Gatti,EM George,G Giannini,S Grandis,D Gruen,RA Gruendl,N Gupta,G Gutierrez,NW Halverson,SR Hinton,GP Holder,DL Hollowood,WL Holzapfel,K Honscheid,JD Hrubes,N Huang,J Hubmayr,KD Irwin,J Mena-Fernández,DJ James,F Kéruzoré,L Knox,K Kuehn,O Lahav,AT Lee,S Lee,D Li,A Lowitz,JL Marshal,M McDonald,JJ McMahon,F Menanteau,SS Meyer,R Miquel,JJ Mohr,J Montgomery,J Myles,T Natoli,JP Nibarger,GI Noble,V Novosad,RLC Ogando,S Padin,S Patil,MES Pereira,A Pieres,AA Malag'on,C Pryke,CL Reichardt,M Rodr'iguez-Monroy,AK Romer,JE Ruhl,BR Saliwanchik,L Salvati,E Sanchez,A Saro,KK Schaffer,T Schrabback,I Sevilla-Noarbe,C Sievers,G Smecher,M Smith,T Somboonpanyakul,B Stalder,AA Stark,E Suchyta,MEC Swanson,G Tarle,C To,C Tucker,T Veach,JD Vieira,M Vincenzi,G Wang,J Weller,N Whitehorn,P Wiseman,WLK Wu,V Yefremenko,JA Zebrowski,Y Zhang

Journal

arXiv preprint arXiv:2311.07512

Published Date

2023/11/13

We present a catalog of 689 galaxy cluster candidates detected at significance via their thermal Sunyaev-Zel'dovich (SZ) effect signature in 95 and 150 GHz data from the 500-square-degree SPTpol survey. We use optical and infrared data from the Dark Energy Camera and the Wide-field Infrared Survey Explorer (WISE) and \spitzer \ satellites, to confirm 544 of these candidates as clusters with purity. The sample has an approximately redshift-independent mass threshold at redshift and spans \ and in mass and redshift, respectively; 21\% of the confirmed clusters are at . We use external radio data from the Sydney University Molonglo Sky Survey (SUMSS) to estimate contamination to the SZ signal from synchrotron sources. The contamination reduces the recovered by a median value of 0.032, or of the threshold value, and of candidates have a predicted contamination greater than . With the exception of a small number of systems , an analysis of clusters detected in single-frequency 95 and 150 GHz data shows no significant contamination of the SZ signal by emission from dusty or synchrotron sources. This cluster sample will be a key component in upcoming astrophysical and cosmological analyses of clusters. The SPTpol millimeter-wave maps and associated data products used to produce this sample are available at https://pole.uchicago.edu/public/Data/Releases.html, and the NASA LAMBDA website. An interactive sky server with the SPTpol maps and Dark Energy Survey data release 2 images is also available at NCSA https://skyviewer …

Measurement of the mean central optical depth of galaxy clusters via the pairwise kinematic Sunyaev-Zel’dovich effect with SPT-3G and DES

Authors

Eduardo Schiappucci,F Bianchini,M Aguena,M Archipley,L Balkenhol,LE Bleem,P Chaubal,TM Crawford,S Grandis,Y Omori,CL Reichardt,E Rozo,ES Rykoff,C To,TMC Abbott,PAR Ade,O Alves,AJ Anderson,F Andrade-Oliveira,J Annis,JS Avva,D Bacon,K Benabed,AN Bender,BA Benson,GM Bernstein,E Bertin,S Bocquet,FR Bouchet,D Brooks,DL Burke,JE Carlstrom,A Carnero Rosell,M Carrasco Kind,J Carretero,TW Cecil,CL Chang,PM Chichura,T-L Chou,M Costanzi,A Cukierman,LN Da Costa,C Daley,T De Haan,S Desai,KR Dibert,HT Diehl,MA Dobbs,P Doel,C Doux,D Dutcher,S Everett,W Everett,C Feng,KR Ferguson,Ismael Ferrero,A Ferté,B Flaugher,A Foster,J Frieman,S Galli,AE Gambrel,J García-Bellido,RW Gardner,M Gatti,T Giannantonio,N Goeckner-Wald,D Gruen,R Gualtieri,S Guns,G Gutierrez,NW Halverson,SR Hinton,E Hivon,GP Holder,DL Hollowood,WL Holzapfel,K Honscheid,JC Hood,N Huang,DJ James,L Knox,M Korman,K Kuehn,C-L Kuo,O Lahav,AT Lee,C Lidman,M Lima,AE Lowitz,C Lu,M March,J Mena-Fernández,F Menanteau,M Millea,R Miquel,JJ Mohr,J Montgomery,J Muir,T Natoli,GI Noble,V Novosad,RLC Ogando,S Padin,Z Pan,F Paz-Chinchón,MES Pereira,A Pieres,AA Plazas Malagón,K Prabhu,J Prat,W Quan,A Rahlin,M Raveri,M Rodriguez-Monroy,AK Romer,M Rouble,JE Ruhl,E Sanchez,V Scarpine,M Schubnell,G Smecher,M Smith,M Soares-Santos,JA Sobrin,E Suchyta,A Suzuki,G Tarle,D Thomas,KL Thompson,B Thorne,Carole Tucker,C Umilta,JD Vieira,M Vincenzi,G Wang,N Weaverdyck,J Weller,N Whitehorn,WLK Wu,V Yefremenko,MR Young

Journal

Physical Review D

Published Date

2023/2/21

We infer the mean optical depth of a sample of optically selected galaxy clusters from the Dark Energy Survey via the pairwise kinematic Sunyaev-Zel’dovich (KSZ) effect. The pairwise KSZ signal between pairs of clusters drawn from the Dark Energy Survey Year-3 cluster catalog is detected at 4.1 σ in cosmic microwave background temperature maps from two years of observations with the SPT-3G camera on the South Pole Telescope. After cuts, there are 24,580 clusters in the∼ 1, 400 deg 2 of the southern sky observed by both experiments. We infer the mean optical depth of the cluster sample with two techniques. The optical depth inferred from the pairwise KSZ signal is τ e=(2.97±0.73)× 10− 3, while that inferred from the thermal SZ signal is τ e=(2.51±0.5 5 stat±0.1 5 syst)× 10− 3. The two measures agree at 0.6 σ. We perform a suite of systematic checks to test the robustness of the analysis.

Dark Energy Survey Year 6 Results: Intra-Cluster Light from Redshift 0.2 to 0.5

Authors

Yuanyuan Zhang,Jesse B Golden-Marx,Ricardo LC Ogando,Brian Yanny,Eli S Rykoff,Sahar Allam,M Aguena,D Bacon,S Bocquet,D Brooks,A Carnero Rosell,J Carretero,T-Y Cheng,C Conselice,M Costanzi,LN da Costa,MES Pereira,TM Davis,S Desai,HT Diehl,P Doel,I Ferrero,B Flaugher,J Frieman,D Gruen,RA Gruendl,SR Hinton,DL Hollowood,K Honscheid,DJ James,T Jeltema,K Kuehn,N Kuropatkin,O Lahav,S Lee,M Lima,J Mena-Fernández,R Miquel,A Palmese,A Pieres,AA Malagón,AK Romer,E Sanchez,M Smith,E Suchyta,G Tarle,C To,DL Tucker,N Weaverdyck

Journal

arXiv preprint arXiv:2309.00671

Published Date

2023/9/1

Using the full six years of imaging data from the Dark Energy Survey, we study the surface brightness profiles of galaxy cluster central galaxies and intra-cluster light. We apply a ``stacking'' method to over four thousand galaxy clusters identified by the redMaPPer cluster finding algorithm in the redshift range of 0.2 to 0.5. This yields high signal-to-noise radial profile measurements of the central galaxy and intra-cluster light out to 1 Mpc from the cluster center. Using redMaPPer richness as a cluster mass indicator, we find that the intra-cluster light brightness has a strong mass dependence throughout the 0.2 to 0.5 redshift range, and the dependence grows stronger at a larger radius. In terms of redshift evolution, we find some evidence that the central galaxy, as well as the diffuse light within the transition region between the cluster central galaxy and intra-cluster light within 80 kpc from the center, may be growing over time. At larger radii, more than 80 kpc away from the cluster center, we do not find evidence of additional redshift evolution beyond the cluster mass dependence, which is consistent with the findings from the IllustrisTNG hydrodynamic simulation. We speculate that the major driver of intra-cluster light growth, especially at large radii, is associated with cluster mass growth. Finally, we find that the color of the cluster central galaxy and intra-cluster light displays a radial gradient that becomes bluer at a larger radius, which is consistent with a stellar stripping and disruption origin of intra-cluster light as suggested by simulation studies.

Joint analysis of Dark Energy Survey Year 3 data and CMB lensing and cosmological constraints

Authors

TMC Abbott,M Aguena,A Alarcon,O Alves,A Amon,F Andrade-Oliveira,J Annis,B Ansarinejad,S Avila,D Bacon,EJ Baxter,K Bechtol,MR Becker,BA Benson,GM Bernstein,E Bertin,J Blazek,LE Bleem,S Bocquet,D Brooks,E Buckley-Geer,DL Burke,H Camacho,A Campos,JE Carlstrom,A Carnero Rosell,M Carrasco Kind,J Carretero,R Cawthon,C Chang,CL Chang,R Chen,A Choi,R Chown,C Conselice,J Cordero,M Costanzi,T Crawford,AT Crites,M Crocce,LN Da Costa,C Davis,TM Davis,T De Haan,J De Vicente,J DeRose,S Desai,HT Diehl,MA Dobbs,S Dodelson,P Doel,C Doux,A Drlica-Wagner,K Eckert,TF Eifler,F Elsner,J Elvin-Poole,S Everett,W Everett,X Fang,Ismael Ferrero,A Ferté,B Flaugher,P Fosalba,O Friedrich,J Frieman,J García-Bellido,M Gatti,EM George,T Giannantonio,G Giannini,D Gruen,RA Gruendl,J Gschwend,G Gutierrez,NW Halverson,Ian Harrison,K Herner,SR Hinton,GP Holder,DL Hollowood,WL Holzapfel,K Honscheid,JD Hrubes,H Huang,EM Huff,D Huterer,B Jain,DJ James,M Jarvis,T Jeltema,S Kent,L Knox,A Kovacs,E Krause,K Kuehn,N Kuropatkin,O Lahav,AT Lee,P-F Leget,P Lemos,AR Liddle,C Lidman,D Luong-Van,JJ McMahon,N MacCrann,M March,JL Marshall,P Martini,J McCullough,P Melchior,F Menanteau,SS Meyer,R Miquel,L Mocanu,JJ Mohr,R Morgan,J Muir,J Myles,T Natoli,A Navarro-Alsina,RC Nichol,Y Omori,S Padin,S Pandey,Y Park,F Paz-Chinchón,MES Pereira,A Pieres,AA Plazas Malagón,A Porredon,J Prat,C Pryke,M Raveri,CL Reichardt,RP Rollins,AK Romer,A Roodman,R Rosenfeld,AJ Ross,JE Ruhl,ES Rykoff,C Sánchez,E Sanchez,J Sanchez,KK Schaffer,LF Secco,I Sevilla-Noarbe,E Sheldon,T Shin

Journal

Physical Review D

Published Date

2023/1/31

We present cosmological constraints from the analysis of two-point correlation functions between galaxy positions and galaxy lensing measured in Dark Energy Survey (DES) Year 3 data and measurements of cosmic microwave background (CMB) lensing from the South Pole Telescope (SPT) and Planck. When jointly analyzing the DES-only two-point functions and the DES cross-correlations with SPT+ P l a n c k CMB lensing, we find Ω m= 0.344±0.030 and S 8≡ σ 8 (Ω m/0.3) 0.5= 0.773±0.016, assuming Λ CDM. When additionally combining with measurements of the CMB lensing autospectrum, we find Ω m= 0.306− 0.021+ 0.018 and S 8= 0.792±0.012. The high signal-to-noise of the CMB lensing cross-correlations enables several powerful consistency tests of these results, including comparisons with constraints derived from cross-correlations only, and comparisons designed to test the robustness of the …

The Dark Energy Survey Six-Year Calibration Star Catalog

Authors

ES Rykoff,DL Tucker,DL Burke,SS Allam,K Bechtol,GM Bernstein,D Brout,RA Gruendl,J Lasker,JA Smith,WC Wester,B Yanny,TMC Abbott,M Aguena,O Alves,F Andrade-Oliveira,J Annis,D Bacon,E Bertin,D Brooks,A Carnero Rosell,J Carretero,FJ Castander,A Choi,LN da Costa,MES Pereira,TM Davis,J De Vicente,HT Diehl,P Doel,A Drlica-Wagner,S Everett,I Ferrero,J Frieman,J García-Bellido,G Giannini,D Gruen,G Gutierrez,SR Hinton,DL Hollowood,DJ James,K Kuehn,O Lahav,JL Marshall,J Mena-Fernández,F Menanteau,J Myles,BD Nord,RLC Ogando,A Palmese,A Pieres,AA Malagón,M Raveri,M Rodgríguez-Monroy,E Sanchez,B Santiago,M Schubnell,I Sevilla-Noarbe,M Smith,M Soares-Santos,E Suchyta,MEC Swanson,TN Varga,M Vincenzi,AR Walker,N Weaverdyck,P Wiseman

Journal

arXiv preprint arXiv:2305.01695

Published Date

2023/5/2

This Technical Note presents a catalog of calibrated reference stars that was generated by the Forward Calibration Method (FGCM) pipeline (arXiv:1706.01542) as part of the FGCM photometric calibration of the full Dark Energy Survey (DES) 6-Year data set (Y6). This catalog provides DES grizY magnitudes for 17 million stars with i-band magnitudes mostly in the range 16 < i < 21 spread over the full DES footprint covering 5000 square degrees over the Southern Galactic Cap at galactic latitudes b < -20 degrees (plus a few outlying fields disconnected from the main survey footprint). These stars are calibrated to a uniformity of better than 1.8 milli-mag (0.18%) RMS over the survey area. The absolute calibration of the catalog is computed with reference to the STISNIC.007 spectrum of the Hubble Space Telescope CalSpec standard star C26202; including systematic errors, the absolute flux system is known at the approximately 1% level. As such, these stars provide a useful reference catalog for calibrating grizY-band or grizY-like band photometry in the Southern Hemisphere, particularly for observations within the DES footprint.

STRIDES: automated uniform models for 30 quadruply imaged quasars

Authors

Thomas Schmidt,Tommaso Treu,S Birrer,Anowar J Shajib,C Lemon,M Millon,Dominique Sluse,A Agnello,T Anguita,MW Auger-Williams,Richard G McMahon,Veronica Motta,Paul Schechter,Chiara Spiniello,Issha Kayo,Frederic Courbin,Sebastian Ertl,Christopher D Fassnacht,Joshua A Frieman,A More,S Schuldt,Sherry H Suyu,Michel Aguena,Felipe Andrade-Oliveira,J Annis,D Bacon,Emmanuel Bertin,D Brooks,David L Burke,Aurelio Carnero Rosell,Matias Carrasco Kind,J Carretero,C Conselice,Matteo Costanzi,Luiz N da Costa,Maria Elidaiana da Silva Pereira,J De Vicente,Shantanu Desai,P Doel,S Everett,Ismael Ferrero,D Friedel,Juan García-Bellido,Enrique Gaztanaga,D Gruen,Robert A Gruendl,J Gschwend,G Gutierrez,Samuel R Hinton,Devon L Hollowood,Klaus Honscheid,David J James,Kyler Kuehn,Ofer Lahav,Felipe Menanteau,R Miquel,A Palmese,Francisco Paz-Chinchón,Adriano Pieres,Andrés A Plazas Malagón,J Prat,M Rodriguez-Monroy,AK Romer,E Sanchez,Vic Scarpine,Ignacio Sevilla-Noarbe,Mathew Smith,E Suchyta,Gregory Tarlé,C To,Tamas Norbert Varga,(DES Collaboration)

Journal

Monthly Notices of the Royal Astronomical Society

Published Date

2023/1

Gravitational time delays provide a powerful one-step measurement of H0, independent of all other probes. One key ingredient in time-delay cosmography are high-accuracy lens models. Those are currently expensive to obtain, both, in terms of computing and investigator time (105–106 CPU hours and ∼0.5–1 yr, respectively). Major improvements in modelling speed are therefore necessary to exploit the large number of lenses that are forecast to be discovered over the current decade. In order to bypass this roadblock, we develop an automated modelling pipeline and apply it to a sample of 31 lens systems, observed by the Hubble Space Telescope in multiple bands. Our automated pipeline can derive models for 30/31 lenses with few hours of human time and <100 CPU hours of computing time for a typical system. For each lens, we provide measurements of key parameters and predictions of magnification …

What drives the variance of galaxy spectra?

Authors

Zahra Sharbaf,Ignacio Ferreras,Ofer Lahav

Journal

Monthly Notices of the Royal Astronomical Society

Published Date

2023/11

We present a study aimed at understanding the physical phenomena underlying the formation and evolution of galaxies following a data-driven analysis of spectroscopic data based on the variance in a carefully selected sample. We apply principal component analysis (PCA) independently to three subsets of continuum-subtracted optical spectra, segregated into their nebular emission activity as quiescent, star-forming, and active galactic nuclei (AGNs). We emphasize that the variance of the input data in this work only relates to the absorption lines in the photospheres of the stellar populations. The sample is taken from the Sloan Digital Sky Survey (SDSS) in the stellar velocity dispersion range 100–150 km s−1, to minimize the ‘blurring’ effect of the stellar motion. We restrict the analysis to the first three principal components (PCs) and find that PCA segregates the three types with the highest variance …

Deep Machine Learning in Cosmology: Evolution or Revolution?

Authors

Ofer Lahav

Journal

arXiv preprint arXiv:2302.04324

Published Date

2023/2/8

Could Machine Learning (ML) make fundamental discoveries and tackle unsolved problems in Cosmology? Detailed observations of the present contents of the universe are consistent with the Cosmological Constant Lambda and Cold Dark Matter model, subject to some unresolved inconsistencies ('tensions') among observations of the Hubble Constant and the clumpiness factor. To understand these issues further, large surveys of billions of galaxies and other probes require new statistical approaches. In recent years the power of ML, and in particular 'Deep Learning', has been demonstrated for object classification, photometric redshifts, anomaly detection, enhanced simulations, and inference of cosmological parameters. It is argued that the more traditional 'shallow learning' (i.e. with pre-processing feature extraction) is actually quite deep, as it brings in human knowledge, while 'deep learning' might be perceived as a black box, unless supplemented by explainability tools. The 'killer applications' of ML for Cosmology are still to come. New ways to train the next generation of scientists for the Data Intensive Science challenges ahead are also discussed. Finally, the chatbot ChatGPT is challenged to address the question posed in this article's title.

The Dark Energy Survey Year 3 and eBOSS: constraining galaxy intrinsic alignments across luminosity and colour space

Authors

S Samuroff,R Mandelbaum,J Blazek,A Campos,N MacCrann,G Zacharegkas,A Amon,J Prat,S Singh,J Elvin-Poole,AJ Ross,A Alarcon,E Baxter,K Bechtol,MR Becker,GM Bernstein,A Carnero Rosell,M Carrasco Kind,R Cawthon,C Chang,R Chen,A Choi,M Crocce,C Davis,J DeRose,S Dodelson,C Doux,A Drlica-Wagner,K Eckert,S Everett,A Ferté,M Gatti,G Giannini,D Gruen,RA Gruendl,I Harrison,K Herner,EM Huff,M Jarvis,N Kuropatkin,PF Leget,P Lemos,J McCullough,J Myles,A Navarro-Alsina,S Pandey,A Porredon,M Raveri,M Rodriguez-Monroy,RP Rollins,A Roodman,G Rossi,ES Rykoff,C Sánchez,LF Secco,I Sevilla-Noarbe,E Sheldon,T Shin,MA Troxel,I Tutusaus,N Weaverdyck,B Yanny,B Yin,Y Zhang,Joseph Zuntz,M Aguena,O Alves,J Annis,D Bacon,E Bertin,S Bocquet,D Brooks,DL Burke,J Carretero,M Costanzi,LN Da Costa,MES Pereira,J De Vicente,S Desai,HT Diehl,JP Dietrich,P Doel,Ismael Ferrero,B Flaugher,J Frieman,J García-Bellido,SR Hinton,DL Hollowood,K Honscheid,DJ James,K Kuehn,O Lahav,JL Marshall,P Melchior,J Mena-Fernández,F Menanteau,R Miquel,J Newman,A Palmese,A Pieres,AA Plazas Malagón,E Sanchez,V Scarpine,M Smith,E Suchyta,MEC Swanson,G Tarle,C To,(DES Collaboration)

Journal

Monthly Notices of the Royal Astronomical Society

Published Date

2023/9

We present direct constraints on galaxy intrinsic alignments (IAs) using the Dark Energy Survey Year 3 (DES Y3), the Extended Baryon Oscillation Spectroscopic Survey (eBOSS), and its precursor, the Baryon Oscillation Spectroscopic Survey (BOSS). Our measurements incorporate photometric red sequence (redMaGiC) galaxies from DES with median redshift z ∼ 0.2–1.0, luminous red galaxies from eBOSS at z ∼ 0.8, and also an SDSS-III BOSS CMASS sample at z ∼ 0.5. We measure two-point IA correlations, which we fit using a model that includes lensing, magnification, and photometric redshift error. Fitting on scales 6 Mpc h−1 < rp < 70 Mpc h−1, we make a detection of IAs in each sample, at 5σ–22σ (assuming a simple one-parameter model for IAs). Using these red samples, we measure the IA–luminosity relation. Our results are statistically consistent with previous results, but offer a significant improvement …

VizieR Online Data Catalog: Stellar mass as a galaxy cluster mass proxy (Palmese+, 2020)

Authors

A Palmese,J Annis,J Burgad,A Farahi,M Soares-Santos,B Welch,M da Silva Pereira,H Lin,S Bhargava,DL Hollowood,R Wilkinson,P Giles,T Jeltema,AK Romer,AE Evrard,M Hilton,C Vergara Cervantes,A Bermeo,J Mayers,J Derose,D Gruen,WG Hartley,O Lahav,B Leistedt,T McClintock,E Rozo,ES Rykoff,TN Varga,RH Wechsler,Y Zhang,S Avila,D Brooks,E Buckley-Geer,DL Burke,A Carnero Rosell,M Carrasco Kind,J Carretero,FJ Castander,C Collins,LN da Costa,S Desai,HT Diehl,JP Dietrich,P Doel,B Flaugher,P Fosalba,J Frieman,J Garcia-Bellido,DW Gerdes,RA Gruendl,J Gschwend,G Gutierrez,K Honscheid,DJ James,E Krause,K Kuehn,N Kuropatkin,A Liddle,M Lima,MAG Maia,RG Mann,JL Marshall,F Menanteau,R Miquel,RLC Ogando,AA Plazas,A Roodman,P Rooney,M Sahlen,E Sanchez,V Scarpine,M Schubnell,S Serrano,I Sevilla-Noarbe,F Sobreira,J Stott,E Suchyta,MEC Swanson,G Tarle,D Thomas,DL Tucker,PTP Viana,V Vikram,AR Walker,DES Collaboration

Journal

VizieR Online Data Catalog

Published Date

2023/5

The DES is an optical-to-near-infrared survey that imaged 5000deg 2 of the South Galactic Cap in the grizY bands over 575 nights spanning almost 6yr. The survey was carried out using a~ 3deg 2 CCD camera (the DECam, see Flaugher et al. 2015AJ.... 150.. 150F) mounted on the Blanco 4-m telescope at the Cerro Tololo Inter-American Observatory (CTIO) in Chile. The data used here come from the first year of observations (2013 September-2014 February, Diehl et al. 2014SPIE. 9149E.. 0VD) and cover 1839deg 2 with up to four passes per filter. The data are available at http://des. ncsa. illinois. edu/releases/y1a1.

DeepZipper. II. Searching for Lensed Supernovae in Dark Energy Survey Data with Deep Learning

Authors

Robert Morgan,B Nord,K Bechtol,A Möller,WG Hartley,S Birrer,SJ González,M Martinez,RA Gruendl,EJ Buckley-Geer,AJ Shajib,A Carnero Rosell,C Lidman,T Collett,TMC Abbott,M Aguena,F Andrade-Oliveira,J Annis,D Bacon,S Bocquet,D Brooks,DL Burke,M Carrasco Kind,J Carretero,Francisco Javier Castander,C Conselice,Luiz N da Costa,M Costanzi,J De Vicente,S Desai,P Doel,S Everett,Ismael Ferrero,B Flaugher,D Friedel,J Frieman,J García-Bellido,E Gaztanaga,D Gruen,G Gutierrez,SR Hinton,DL Hollowood,K Honscheid,K Kuehn,N Kuropatkin,Ofer Lahav,M Lima,F Menanteau,R Miquel,A Palmese,F Paz-Chinchón,MES Pereira,A Pieres,AA Plazas Malagón,J Prat,M Rodriguez-Monroy,AK Romer,A Roodman,E Sanchez,V Scarpine,I Sevilla-Noarbe,M Smith,E Suchyta,Molly EC Swanson,Gregory Tarlé,D Thomas,Tamas Norbert Varga

Journal

The Astrophysical Journal

Published Date

2023/1/23

Gravitationally lensed supernovae (LSNe) are important probes of cosmic expansion, but they remain rare and difficult to find. Current cosmic surveys likely contain 5–10 LSNe in total while next-generation experiments are expected to contain several hundred to a few thousand of these systems. We search for these systems in observed Dark Energy Survey (DES) five year SN fields—10 3 sq. deg. regions of sky imaged in the griz bands approximately every six nights over five years. To perform the search, we utilize the DeepZipper approach: a multi-branch deep learning architecture trained on image-level simulations of LSNe that simultaneously learns spatial and temporal relationships from time series of images. We find that our method obtains an LSN recall of 61.13% and a false-positive rate of 0.02% on the DES SN field data. DeepZipper selected 2245 candidates from a magnitude-limited (m i< 22.5) catalog …

Consistent lensing and clustering in a low-S8 Universe with BOSS, DES Year 3, HSC Year 1, and KiDS-1000

Authors

Alexandra Amon,NC Robertson,Hironao Miyatake,Catherine Heymans,Martin White,Joseph DeRose,Sihan Yuan,Risa H Wechsler,Tamas Norbert Varga,S Bocquet,Andrej Dvornik,S More,AJ Ross,Henk Hoekstra,A Alarcon,Marika Asgari,J Blazek,A Campos,R Chen,A Choi,M Crocce,HT Diehl,C Doux,K Eckert,J Elvin-Poole,S Everett,Agnès Ferté,M Gatti,G Giannini,D Gruen,Robert A Gruendl,William G Hartley,K Herner,H Hildebrandt,S Huang,Eric M Huff,Benjamin Joachimi,S Lee,Niall MacCrann,J Myles,A Navarro-Alsina,T Nishimichi,J Prat,Lucas Frozza Secco,Ignacio Sevilla-Noarbe,E Sheldon,T Shin,T Tröster,Michael A Troxel,I Tutusaus,AH Wright,B Yin,Michel Aguena,Sahar Allam,J Annis,D Bacon,M Bilicki,D Brooks,DL Burke,Aurelio Carnero Rosell,J Carretero,Francisco Javier Castander,Ross Cawthon,M Costanzi,Luiz N da Costa,Maria Elidaiana da Silva Pereira,J De Jong,J De Vicente,Shantanu Desai,JP Dietrich,P Doel,Ismael Ferrero,J Frieman,Juan García-Bellido,David W Gerdes,J Gschwend,G Gutierrez,Samuel R Hinton,Devon L Hollowood,Klaus Honscheid,Dragan Huterer,A Kannawadi,Kyler Kuehn,N Kuropatkin,Ofer Lahav,M Lima,Marcio AG Maia,JL Marshall,Felipe Menanteau,R Miquel,Joseph J Mohr,R Morgan,J Muir,Francisco Paz-Chinchón,A Pieres,Andrés A Plazas Malagón,A Porredon,M Rodriguez-Monroy,A Roodman,E Sanchez,S Serrano,H Shan,E Suchyta,Molly EC Swanson,Gregory Tarlé,D Thomas,C To,Y Zhang

Journal

Monthly Notices of the Royal Astronomical Society

Published Date

2023/1

We evaluate the consistency between lensing and clustering based on measurements from Baryon Oscillation Spectroscopic Survey combined with galaxy–galaxy lensing from Dark Energy Survey (DES) Year 3, Hyper Suprime-Cam Subaru Strategic Program (HSC) Year 1, and Kilo-Degree Survey (KiDS)-1000. We find good agreement between these lensing data sets. We model the observations using the Dark Emulator and fit the data at two fixed cosmologies: Planck (S8 = 0.83), and a Lensing cosmology (S8 = 0.76). For a joint analysis limited to large scales, we find that both cosmologies provide an acceptable fit to the data. Full utilization of the higher signal-to-noise small-scale measurements is hindered by uncertainty in the impact of baryon feedback and assembly bias, which we account for with a reasoned theoretical error budget. We incorporate a systematic inconsistency parameter for each redshift …

The intrinsic alignment of red galaxies in DES Y1 redMaPPer galaxy clusters

Authors

C Zhou,A Tong,MA Troxel,J Blazek,C Lin,D Bacon,L Bleem,C Chang,M Costanzi,J DeRose,JP Dietrich,A Drlica-Wagner,D Gruen,RA Gruendl,B Hoyle,M Jarvis,N MacCrann,B Mawdsley,T McClintock,P Melchior,J Prat,A Pujol,E Rozo,ES Rykoff,S Samuroff,E Sheldon,T Shin,A Carnero Rosell,B Yanny,C Sánchez,DL Tucker,I Sevilla-Noarbe,Joseph Zuntz,TN Varga,Y Zhang,O Alves,A Amon,E Bertin,D Brooks,DL Burke,M Carrasco Kind,LN da Costa,TM Davis,J De Vicente,S Desai,HT Diehl,P Doel,S Everett,Ismael Ferrero,B Flaugher,J Frieman,DW Gerdes,G Gutierrez,SR Hinton,DL Hollowood,K Honscheid,DJ James,T Jeltema,K Kuehn,O Lahav,M Lima,JL Marshall,J Mena-Fernández,F Menanteau,R Miquel,A Palmese,F Paz-Chinchón,A Pieres,AA Plazas Malagón,A Porredon,M Raveri,AK Romer,E Sanchez,M Smith,M Soares-Santos,E Suchyta,MEC Swanson,G Tarle,C To,N Weaverdyck,J Weller,P Wiseman

Journal

Monthly Notices of the Royal Astronomical Society

Published Date

2023/11

Clusters of galaxies trace the most non-linear peaks in the cosmic density field. The weak gravitational lensing of background galaxies by clusters can allow us to infer their masses. However, galaxies associated with the local environment of the cluster can also be intrinsically aligned due to the local tidal gradient, contaminating any cosmology derived from the lensing signal. We measure this intrinsic alignment in Dark Energy Survey (DES) Year 1 redMaPPer clusters. We find evidence of a non-zero mean radial alignment of galaxies within clusters between redshifts 0.1–0.7. We find a significant systematic in the measured ellipticities of cluster satellite galaxies that we attribute to the central galaxy flux and other intracluster light. We attempt to correct this signal, and fit a simple model for intrinsic alignment amplitude (AIA) to the measurement, finding AIA = 0.15 ± 0.04, when excluding data near the edge of the …

Mapping variations of redshift distributions with probability integral transforms

Authors

Justin Myles,Daniel Gruen,Alexandra Amon,A Alarcon,J DeRose,S Everett,Scott Dodelson,Gary M Bernstein,A Campos,I Harrison,Niall MacCrann,J McCullough,M Raveri,Carles Sánchez,Michael A Troxel,B Yin,TMC Abbott,Sahar Allam,O Alves,Felipe Andrade-Oliveira,E Bertin,D Brooks,David L Burke,A Carnero Rosell,M Carrasco Kind,J Carretero,Ross Cawthon,M Costanzi,Luiz N da Costa,Maria Elidaiana da Silva Pereira,Shantanu Desai,P Doel,Ismael Ferrero,Brenna Flaugher,Josh Frieman,Juan García-Bellido,M Gatti,David W Gerdes,Robert A Gruendl,Julia Gschwend,Gaston Gutierrez,William G Hartley,Samuel R Hinton,Devon L Hollowood,Klaus Honscheid,DJ James,K Kuehn,Ofer Lahav,P Melchior,J Mena-Fernández,F Menanteau,R Miquel,Joseph J Mohr,A Palmese,Francisco Paz-Chinchón,Adriano Pieres,AA Plazas Malagón,J Prat,M Rodriguez-Monroy,E Sanchez,Vic Scarpine,Ignacio Sevilla-Noarbe,M Smith,Eric Suchyta,Molly EC Swanson,Gregory Tarlé,DL Tucker,M Vincenzi,Noah Weaverdyck,(DES Collaboration)

Journal

Monthly Notices of the Royal Astronomical Society

Published Date

2023/2

We present a method for mapping variations between probability distribution functions and apply this method within the context of measuring galaxy redshift distributions from imaging survey data. This method, which we name PITPZ for the probability integral transformations it relies on, uses a difference in curves between distribution functions in an ensemble as a transformation to apply to another distribution function, thus transferring the variation in the ensemble to the latter distribution function. This procedure is broadly applicable to the problem of uncertainty propagation. In the context of redshift distributions, for example, the uncertainty contribution due to certain effects can be studied effectively only in simulations, thus necessitating a transfer of variation measured in simulations to the redshift distributions measured from data. We illustrate the use of PITPZ by using the method to propagate photometric …

Dark Energy Survey year 3 results: Constraints on cosmological parameters and galaxy-bias models from galaxy clustering and galaxy-galaxy lensing using the redMaGiC sample

Authors

Shivam Pandey,E Krause,J DeRose,N MacCrann,B Jain,M Crocce,J Blazek,A Choi,H Huang,C To,X Fang,J Elvin-Poole,J Prat,A Porredon,LF Secco,M Rodriguez-Monroy,N Weaverdyck,Y Park,M Raveri,E Rozo,ES Rykoff,GM Bernstein,C Sánchez,M Jarvis,MA Troxel,G Zacharegkas,C Chang,A Alarcon,O Alves,A Amon,F Andrade-Oliveira,E Baxter,K Bechtol,MR Becker,H Camacho,A Campos,A Carnero Rosell,M Carrasco Kind,R Cawthon,R Chen,P Chintalapati,C Davis,E Di Valentino,HT Diehl,S Dodelson,C Doux,A Drlica-Wagner,K Eckert,TF Eifler,F Elsner,S Everett,A Farahi,A Ferté,P Fosalba,O Friedrich,M Gatti,G Giannini,D Gruen,RA Gruendl,I Harrison,WG Hartley,EM Huff,D Huterer,A Kovacs,PF Leget,J McCullough,J Muir,J Myles,A Navarro-Alsina,Y Omori,RP Rollins,A Roodman,R Rosenfeld,I Sevilla-Noarbe,E Sheldon,T Shin,A Troja,I Tutusaus,TN Varga,RH Wechsler,B Yanny,B Yin,Y Zhang,Joseph Zuntz,TMC Abbott,M Aguena,S Allam,J Annis,D Bacon,E Bertin,D Brooks,DL Burke,J Carretero,C Conselice,M Costanzi,LN Da Costa,MES Pereira,J De Vicente,JP Dietrich,P Doel,AE Evrard,Ismael Ferrero,B Flaugher,J Frieman,J García-Bellido,E Gaztanaga,DW Gerdes,T Giannantonio,J Gschwend,G Gutierrez,SR Hinton,DL Hollowood,K Honscheid,DJ James,T Jeltema,K Kuehn,N Kuropatkin,O Lahav,M Lima,H Lin,MAG Maia,JL Marshall,P Melchior,F Menanteau,CJ Miller,R Miquel,JJ Mohr,R Morgan,A Palmese,F Paz-Chinchón,D Petravick,A Pieres,AA Plazas Malagón,E Sanchez,V Scarpine,S Serrano,M Smith,M Soares-Santos,E Suchyta,G Tarle,D Thomas,J Weller,DES Collaboration

Journal

Physical Review D

Published Date

2022/8/15

We constrain cosmological parameters and galaxy-bias parameters using the combination of galaxy clustering and galaxy-galaxy lensing measurements from the Dark Energy Survey (DES) year-3 data. We describe our modeling framework and choice of scales analyzed, validating their robustness to theoretical uncertainties in small-scale clustering by analyzing simulated data. Using a linear galaxy-bias model and redMaGiC galaxy sample, we obtain 10% constraints on the matter density of the Universe. We also implement a nonlinear galaxy-bias model to probe smaller scales that includes parametrization based on hybrid perturbation theory and find that it leads to a 17% gain in cosmological constraining power. We perform robustness tests of our methodology pipeline and demonstrate stability of the constraints to changes in the theory model. Using the redMaGiC galaxy sample as foreground lens galaxies …

Dark Energy Survey Year 3 results: Cosmology with moments of weak lensing mass maps

Authors

Marco Gatti,Bhuvnesh Jain,C Chang,Marco Raveri,Dominik Zürcher,L Secco,Lorne Whiteway,Niall Jeffrey,Cyrille Doux,Tomasz Kacprzak,D Bacon,Pablo Fosalba,A Alarcon,Alexandra Amon,K Bechtol,M Becker,G Bernstein,J Blazek,Andresa Campos,Ami Choi,C Davis,J Derose,S Dodelson,F Elsner,J Elvin-Poole,S Everett,A Ferte,D Gruen,I Harrison,D Huterer,M Jarvis,E Krause,PF Leget,P Lemos,N Maccrann,J Mccullough,J Muir,J Myles,A Navarro,S Pandey,J Prat,RP Rollins,A Roodman,C Sanchez,E Sheldon,T Shin,M Troxel,I Tutusaus,B Yin,M Aguena,S Allam,F Andrade-Oliveira,J Annis,E Bertin,D Brooks,DL Burke,A Carnero Rosell,M Carrasco Kind,J Carretero,R Cawthon,M Costanzi,LN Da Costa,MES Pereira,J De Vicente,S Desai,HT Diehl,JP Dietrich,P Doel,A Drlica-Wagner,K Eckert,AE Evrard,Ismael Ferrero,J García-Bellido,E Gaztanaga,T Giannantonio,RA Gruendl,J Gschwend,G Gutierrez,SR Hinton,DL Hollowood,K Honscheid,DJ James,K Kuehn,N Kuropatkin,O Lahav,C Lidman,MAG Maia,JL Marshall,P Melchior,F Menanteau,R Miquel,R Morgan,A Palmese,F Paz-Chinchón,A Pieres,AA Plazas Malagón,K Reil,M Rodriguez-Monroyv,AK Romer,E Sanchez,M Schubnell,S Serrano,I Sevilla-Noarbe,M Smith,M Soares-Santos,E Suchyta,G Tarle,D Thomas,C To,TN Varga,DES Collaboration

Journal

Physical Review D

Published Date

2022/10/12

We present a cosmological analysis using the second and third moments of the weak lensing mass (convergence) maps from the first three years of data (Y3) data of the Dark Energy Survey. The survey spans an effective area of 4139 square degrees and uses the images of over 100 million galaxies to reconstruct the convergence field. The second moment of the convergence as a function of smoothing scale contains information similar to standard shear 2-point statistics. The third moment, or the skewness, contains additional non-Gaussian information. The data is analyzed in the context of the Λ CDM model, varying five cosmological parameters and 19 nuisance parameters modeling astrophysical and measurement systematics. Our modeling of the observables is completely analytical, and has been tested with simulations in our previous methodology study. We obtain a 1.7% measurement of the amplitude of …

Dark Energy Survey Year 3 results: Measurement of the baryon acoustic oscillations with three-dimensional clustering

Authors

Kwan Chuen Chan,S Avila,A Carnero Rosell,Ismael Ferrero,J Elvin-Poole,E Sanchez,H Camacho,A Porredon,M Crocce,TMC Abbott,M Aguena,S Allam,F Andrade-Oliveira,E Bertin,S Bocquet,D Brooks,DL Burke,M Carrasco Kind,J Carretero,FJ Castander,R Cawthon,C Conselice,M Costanzi,MES Pereira,J De Vicente,S Desai,HT Diehl,P Doel,S Everett,B Flaugher,P Fosalba,J García-Bellido,E Gaztanaga,DW Gerdes,T Giannantonio,D Gruen,RA Gruendl,G Gutierrez,SR Hinton,DL Hollowood,K Honscheid,D Huterer,DJ James,K Kuehn,O Lahav,C Lidman,M Lima,JL Marshall,J Mena-Fernández,F Menanteau,R Miquel,A Palmese,F Paz-Chinchón,A Pieres,AA Plazas Malagón,M Raveri,M Rodriguez-Monroy,A Roodman,AJ Ross,V Scarpine,I Sevilla-Noarbe,M Smith,E Suchyta,MEC Swanson,G Tarle,D Thomas,DL Tucker,M Vincenzi,N Weaverdyck,DES Collaboration

Journal

Physical Review D

Published Date

2022/12/8

The three-dimensional correlation function offers an effective way to summarize the correlation of the large-scale structure even for imaging galaxy surveys. We have applied the projected three-dimensional correlation function, ξ p to measure the baryonic acoustic oscillations (BAO) scale on the first-three years Dark Energy Survey data. The sample consists of about 7 million galaxies in the redshift range 0.6< z p< 1.1 over a footprint of 4108 deg 2. Our theory modeling includes the impact of realistic true redshift distributions beyond Gaussian photo-z approximation. ξ p is obtained by projecting the three-dimensional correlation to the transverse direction. To increase the signal-to-noise of the measurements, we have considered a Gaussian stacking window function in place of the commonly used top-hat. ξ p is sensitive to D M (z eff)/r s, the ratio between the comoving angular diameter distance and the sound horizon …

Dark Energy Survey Year 3 results: marginalization over redshift distribution uncertainties using ranking of discrete realizations

Authors

Juan P Cordero,Ian Harrison,Richard P Rollins,GM Bernstein,SL Bridle,A Alarcon,O Alves,A Amon,F Andrade-Oliveira,H Camacho,A Campos,A Choi,J DeRose,S Dodelson,K Eckert,TF Eifler,S Everett,X Fang,O Friedrich,D Gruen,RA Gruendl,WG Hartley,EM Huff,E Krause,N Kuropatkin,N MacCrann,J McCullough,J Myles,S Pandey,M Raveri,R Rosenfeld,ES Rykoff,C Sánchez,J Sánchez,I Sevilla-Noarbe,E Sheldon,M Troxel,R Wechsler,B Yanny,B Yin,Y Zhang,M Aguena,S Allam,E Bertin,D Brooks,DL Burke,A Carnero Rosell,M Carrasco Kind,J Carretero,FJ Castander,R Cawthon,M Costanzi,L Da Costa,ME da Silva Pereira,J De Vicente,HT Diehl,J Dietrich,P Doel,J Elvin-Poole,Ismael Ferrero,B Flaugher,P Fosalba,J Frieman,J Garcia-Bellido,D Gerdes,J Gschwend,G Gutierrez,S Hinton,DL Hollowood,K Honscheid,B Hoyle,D James,K Kuehn,O Lahav,MAG Maia,M March,F Menanteau,R Miquel,R Morgan,J Muir,A Palmese,F Paz-Chinchon,A Pieres,A Plazas Malagón,E Sánchez,V Scarpine,S Serrano,M Smith,M Soares-Santos,E Suchyta,M Swanson,G Tarle,D Thomas,C To,TN Varga,(DES Collaboration)

Journal

Monthly Notices of the Royal Astronomical Society

Published Date

2022/4

Cosmological information from weak lensing surveys is maximized by sorting source galaxies into tomographic redshift subsamples. Any uncertainties on these redshift distributions must be correctly propagated into the cosmological results. We present hyperrank, a new method for marginalizing over redshift distribution uncertainties, using discrete samples from the space of all possible redshift distributions, improving over simple parametrized models. In hyperrank, the set of proposed redshift distributions is ranked according to a small (between one and four) number of summary values, which are then sampled, along with other nuisance parameters and cosmological parameters in the Monte Carlo chain used for inference. This approach can be regarded as a general method for marginalizing over discrete realizations of data vector variation with nuisance parameters, which can consequently be sampled …

Dark Energy Survey Year 3 results: A 2.7% measurement of baryon acoustic oscillation distance scale at redshift 0.835

Authors

TMC Abbott,M Aguena,S Allam,A Amon,F Andrade-Oliveira,J Asorey,S Avila,GM Bernstein,E Bertin,A Brandao-Souza,D Brooks,DL Burke,J Calcino,H Camacho,A Carnero Rosell,D Carollo,M Carrasco Kind,J Carretero,FJ Castander,R Cawthon,KC Chan,A Choi,C Conselice,M Costanzi,M Crocce,LN Da Costa,MES Pereira,TM Davis,J De Vicente,S Desai,HT Diehl,P Doel,K Eckert,J Elvin-Poole,S Everett,AE Evrard,X Fang,Ismael Ferrero,A Ferté,B Flaugher,P Fosalba,J García-Bellido,E Gaztanaga,DW Gerdes,T Giannantonio,K Glazebrook,D Gomes,D Gruen,RA Gruendl,J Gschwend,G Gutierrez,SR Hinton,DL Hollowood,K Honscheid,D Huterer,B Jain,DJ James,T Jeltema,N Kokron,E Krause,K Kuehn,O Lahav,GF Lewis,C Lidman,M Lima,H Lin,MAG Maia,U Malik,P Martini,P Melchior,J Mena-Fernández,F Menanteau,R Miquel,JJ Mohr,R Morgan,J Muir,J Myles,A Möller,A Palmese,F Paz-Chinchón,WJ Percival,A Pieres,AA Plazas Malagón,A Porredon,J Prat,K Reil,M Rodriguez-Monroy,AK Romer,A Roodman,R Rosenfeld,AJ Ross,E Sanchez,D Sanchez Cid,V Scarpine,S Serrano,I Sevilla-Noarbe,E Sheldon,M Smith,M Soares-Santos,Eric Suchyta,MEC Swanson,G Tarle,D Thomas,C To,MA Troxel,BE Tucker,DL Tucker,I Tutusaus,SA Uddin,TN Varga,J Weller,RD Wilkinson,DES Collaboration

Journal

Physical Review D

Published Date

2022/2/8

We present angular diameter measurements obtained by measuring the position of baryon acoustic oscillations (BAO) in an optimized sample of galaxies from the first three years of Dark Energy Survey data (DES Y3). The sample consists of 7 million galaxies distributed over a footprint of 4100 deg 2 with 0.6< z photo< 1.1 and a typical redshift uncertainty of 0.03 (1+ z). The sample selection is the same as in the BAO measurement with the first year of DES data, but the analysis presented here uses three times the area, extends to higher redshift, and makes a number of improvements, including a fully analytical BAO template, the use of covariances from both theory and simulations, and an extensive preunblinding protocol. We used two different statistics; angular correlation function and power spectrum, and validate our pipeline with an ensemble of over 1500 realistic simulations. Both statistics yield compatible …

Dark energy survey year 3 results: High-precision measurement and modeling of galaxy-galaxy lensing

Authors

Judit Prat,J Blazek,C Sánchez,I Tutusaus,S Pandey,J Elvin-Poole,E Krause,MA Troxel,LF Secco,A Amon,J DeRose,G Zacharegkas,C Chang,B Jain,N MacCrann,Y Park,E Sheldon,G Giannini,S Bocquet,C To,A Alarcon,O Alves,F Andrade-Oliveira,E Baxter,K Bechtol,MR Becker,GM Bernstein,H Camacho,A Campos,A Carnero Rosell,M Carrasco Kind,R Cawthon,R Chen,A Choi,J Cordero,M Crocce,C Davis,J De Vicente,HT Diehl,S Dodelson,C Doux,A Drlica-Wagner,K Eckert,TF Eifler,F Elsner,S Everett,X Fang,A Farahi,A Ferté,P Fosalba,O Friedrich,M Gatti,D Gruen,RA Gruendl,I Harrison,WG Hartley,K Herner,H Huang,EM Huff,D Huterer,M Jarvis,N Kuropatkin,P-F Leget,P Lemos,AR Liddle,J McCullough,J Muir,J Myles,A Navarro-Alsina,A Porredon,M Raveri,M Rodriguez-Monroy,RP Rollins,A Roodman,R Rosenfeld,AJ Ross,ES Rykoff,J Sanchez,I Sevilla-Noarbe,T Shin,A Troja,TN Varga,N Weaverdyck,RH Wechsler,B Yanny,B Yin,Joseph Zuntz,TMC Abbott,M Aguena,S Allam,J Annis,D Bacon,D Brooks,DL Burke,J Carretero,C Conselice,M Costanzi,LN Da Costa,MES Pereira,S Desai,JP Dietrich,P Doel,AE Evrard,Ismael Ferrero,B Flaugher,J Frieman,J García-Bellido,E Gaztanaga,DW Gerdes,T Giannantonio,J Gschwend,G Gutierrez,SR Hinton,DL Hollowood,K Honscheid,DJ James,K Kuehn,O Lahav,H Lin,MAG Maia,JL Marshall,P Martini,P Melchior,F Menanteau,CJ Miller,R Miquel,JJ Mohr,R Morgan,RLC Ogando,A Palmese,F Paz-Chinchón,D Petravick,AA Plazas Malagón,E Sanchez,S Serrano,M Smith,M Soares-Santos,E Suchyta,G Tarle,D Thomas,J Weller,DES Collaboration

Journal

Physical Review D

Published Date

2022/4/26

We present and characterize the galaxy-galaxy lensing signal measured using the first three years of data from the Dark Energy Survey (DES Y3) covering 4132 deg 2. These galaxy-galaxy measurements are used in the DES Y3 3× 2 pt cosmological analysis, which combines weak lensing and galaxy clustering information. We use two lens samples: a magnitude-limited sample and the red m a g i c sample, which span the redshift range∼ 0.2–1 with 10.7 and 2.6 M galaxies, respectively. For the source catalog, we use the metacalibration shape sample, consisting of≃ 100 M galaxies separated into four tomographic bins. Our galaxy-galaxy lensing estimator is the mean tangential shear, for which we obtain a total SNR of∼ 148 for m ag l im (∼ 120 for red m a g i c), and∼ 67 (∼ 55) after applying the scale cuts of 6 Mpc/h. Thus we reach percent-level statistical precision, which requires that our modeling and …

Dark Energy Survey Year 3 results: calibration of lens sample redshift distributions using clustering redshifts with BOSS/eBOSS

Authors

Ross Cawthon,J Elvin-Poole,A Porredon,M Crocce,G Giannini,M Gatti,AJ Ross,ES Rykoff,A Carnero Rosell,J DeRose,S Lee,M Rodriguez-Monroy,A Amon,K Bechtol,J De Vicente,D Gruen,R Morgan,E Sanchez,J Sanchez,I Sevilla-Noarbe,TMC Abbott,M Aguena,S Allam,J Annis,S Avila,D Bacon,E Bertin,D Brooks,DL Burke,M Carrasco Kind,J Carretero,FJ Castander,A Choi,M Costanzi,LN Da Costa,MES Pereira,K Dawson,S Desai,HT Diehl,K Eckert,S Everett,Ismael Ferrero,P Fosalba,J Frieman,J García-Bellido,E Gaztanaga,RA Gruendl,J Gschwend,G Gutierrez,SR Hinton,DL Hollowood,K Honscheid,D Huterer,DJ James,AG Kim,JP Kneib,K Kuehn,N Kuropatkin,O Lahav,M Lima,H Lin,MAG Maia,P Melchior,F Menanteau,R Miquel,JJ Mohr,J Muir,J Myles,A Palmese,S Pandey,F Paz-Chinchón,WJ Percival,AA Plazas,A Roodman,G Rossi,V Scarpine,S Serrano,M Smith,M Soares-Santos,E Suchyta,MEC Swanson,G Tarle,C To,MA Troxel,RD Wilkinson,(DES Collaboration)

Journal

Monthly Notices of the Royal Astronomical Society

Published Date

2022/7

We present clustering redshift measurements for Dark Energy Survey (DES) lens sample galaxies used in weak gravitational lensing and galaxy clustering studies. To perform these measurements, we cross-correlate with spectroscopic galaxies from the Baryon Acoustic Oscillation Survey (BOSS) and its extension, eBOSS. We validate our methodology in simulations, including a new technique to calibrate systematic errors that result from the galaxy clustering bias, and we find that our method is generally unbiased in calibrating the mean redshift. We apply our method to the data, and estimate the redshift distribution for 11 different photometrically selected bins. We find general agreement between clustering redshift and photometric redshift estimates, with differences on the inferred mean redshift found to be below |Δz| = 0.01 in most of the bins. We also test a method to calibrate a width parameter for redshift …

VizieR Online Data Catalog: DES Bright Arcs Survey: strong lens systems (O'Donnell+, 2022)

Authors

JH O'Donnell,RD Wilkinson,HT Diehl,C Aros-Bunster,K Bechtol,S Birrer,EJ Buckley-Geer,A Carnero Rosell,M Carrasco Kind,LN da Costa,SJ Gonzalez Lozano,RA Gruendl,M Hilton,H Lin,KA Lindgren,J Martin,A Pieres,ES Rykoff,I Sevilla-Noarbe,E Sheldon,C Sifon,DL Tucker,B Yanny,TMC Abbott,M Aguena,S Allam,F Andrade-Oliveira,J Annis,E Bertin,D Brooks,DL Burke,J Carretero,M Costanzi,S Desai,JP Dietrich,K Eckert,S Everett,I Ferrero,B Flaugher,P Fosalba,J Frieman,J Garcia-Bellido,E Gaztanaga,DW Gerdes,D Gruen,J Gschwend,MSS Gill,G Gutierrez,SR Hinton,DL Hollowood,K Honscheid,DJ James,T Jeltema,K Kuehn,O Lahav,M Lima,MAG Maia,JL Marshall,P Melchior,F Menanteau,R Miquel,R Morgan,B Nord,RLC Ogando,F Paz-Chinchon,MES Pereira,AA Plazas Malagon,M Rodriguez-Monroy,AK Romer,A Roodman,E Sanchez,V Scarpine,S Serrano,M Smith,E Suchyta,MEC Swanson,G Tarle,D Thomas,C To,TN Varga,Des Collaboration

Journal

VizieR Online Data Catalog

Published Date

2022/6

The Dark Energy Survey (DES) has completed a six-season program that imaged 5100 square degrees of the southern galactic cap using the Dark Energy Camera (DECam), which is operated on the 4m Victor M. Blanco Telescope at Cerro Tololo Inter-American Observatory (CTIO) near La Serena, Chile.

The DECam Local Volume Exploration Survey Data Release 2

Authors

Alex Drlica-Wagner,PS Ferguson,M Adamów,M Aguena,S Allam,F Andrade-Oliveira,D Bacon,K Bechtol,EF Bell,E Bertin,P Bilaji,S Bocquet,CR Bom,D Brooks,DL Burke,JA Carballo-Bello,JL Carlin,A Carnero Rosell,M Carrasco Kind,J Carretero,FJ Castander,W Cerny,C Chang,Y Choi,C Conselice,M Costanzi,D Crnojević,LN da Costa,J De Vicente,S Desai,J Esteves,S Everett,I Ferrero,M Fitzpatrick,B Flaugher,D Friedel,J Frieman,J García-Bellido,M Gatti,E Gaztanaga,DW Gerdes,D Gruen,RA Gruendl,J Gschwend,WG Hartley,D Hernandez-Lang,SR Hinton,DL Hollowood,K Honscheid,AK Hughes,A Jacques,DJ James,MD Johnson,K Kuehn,N Kuropatkin,O Lahav,TS Li,C Lidman,H Lin,M March,JL Marshall,D Martinez-Delgado,CE Martínez-Vázquez,P Massana,S Mau,M McNanna,P Melchior,F Menanteau,AE Miller,R Miquel,JJ Mohr,R Morgan,B Mutlu-Pakdil,RR Muñoz,EH Neilsen,DL Nidever,R Nikutta,JL Nilo Castellon,NED Noel,RLC Ogando,KAG Olsen,AB Pace,A Palmese,F Paz-Chinchon,MES Pereira,A Pieres,AA Plazas Malagón,J Prat,AH Riley,M Rodriguez-Monroy,AK Romer,A Roodman,M Sako,JD Sakowska,E Sanchez,FJ Sánchez,DJ Sand,L Santana-Silva,B Santiago,M Schubnell,S Serrano,I Sevilla-Noarbe,JD Simon,M Smith,M Soares-Santos,GS Stringfellow,E Suchyta,DJ Suson,CY Tan,G Tarle,K Tavangar,D Thomas,C To,EJ Tollerud,MA Troxel,DL Tucker,TN Varga,AK Vivas,AR Walker,J Weller,RD Wilkinson,JF Wu,B Yanny,E Zaborowski,A Zenteno,Delve Collaboration,Des Collaboration

Journal

The Astrophysical Journal Supplement Series

Published Date

2022/8/4

We present the second public data release (DR2) from the DECam Local Volume Exploration survey (DELVE). DELVE DR2 combines new DECam observations with archival DECam data from the Dark Energy Survey, the DECam Legacy Survey, and other DECam community programs. DELVE DR2 consists of∼ 160,000 exposures that cover> 21,000 deg 2 of the high-Galactic-latitude (∣ b∣> 10) sky in four broadband optical/near-infrared filters (g, r, i, z). DELVE DR2 provides point-source and automatic aperture photometry for∼ 2.5 billion astronomical sources with a median 5σ point-source depth of g= 24.3, r= 23.9, i= 23.5, and z= 22.8 mag. A region of∼ 17,000 deg 2 has been imaged in all four filters, providing four-band photometric measurements for∼ 618 million astronomical sources. DELVE DR2 covers more than 4 times the area of the previous DELVE data release and contains roughly 5 times as many …

The MegaMapper: A Stage-5 Spectroscopic Instrument Concept for the Study of Inflation and Dark Energy

Authors

David J Schlegel,Juna A Kollmeier,Greg Aldering,Stephen Bailey,Charles Baltay,Christopher Bebek,Segev BenZvi,Robert Besuner,Guillermo Blanc,Adam S Bolton,Ana Bonaca,Mohamed Bouri,David Brooks,Elizabeth Buckley-Geer,Zheng Cai,Jeffrey Crane,Regina Demina,Joseph DeRose,Arjun Dey,Peter Doel,Xiaohui Fan,Simone Ferraro,Douglas Finkbeiner,Andreu Font-Ribera,Satya Gontcho A Gontcho,Daniel Green,Gaston Gutierrez,Julien Guy,Henry Heetderks,Dragan Huterer,Leopoldo Infante,Patrick Jelinsky,Dionysios Karagiannis,Stephen M Kent,Alex G Kim,Jean-Paul Kneib,Anthony Kremin,Luzius Kronig,Nick Konidaris,Ofer Lahav,Michael L Lampton,Martin Landriau,Dustin Lang,Alexie Leauthaud,Michael E Levi,Michele Liguori,Eric V Linder,Christophe Magneville,Paul Martini,Mario Mateo,Patrick McDonald,Christopher J Miller,John Moustakas,Adam D Myers,John Mulchaey,Jeffrey A Newman,Peter E Nugent,Nikhil Padmanabhan,Nathalie Palanque-Delabrouille,Antonella Palmese Anthony L Piro,Claire Poppett,Jason X Prochaska,Anthony R Pullen,David Rabinowitz,Anand Raichoor,Solange Ramirez,Hans-Walter Rix,Ashley J Ross,Lado Samushia,Emmanuel Schaan,Michael Schubnell,Uros Seljak,Hee-Jong Seo,Stephen A Shectman,Edward F Schlafly,Joseph Silber,Joshua D Simon,Zachary Slepian,Anže Slosar,Marcelle Soares-Santos,Greg Tarlé,Ian Thompson,Monica Valluri,Risa H Wechsler,Martin White,Michael J Wilson,Christophe Yèche,Dennis Zaritsky,Rongpu Zhou

Journal

arXiv preprint arXiv:2209.04322

Published Date

2022/9/9

In this white paper, we present the MegaMapper concept. The MegaMapper is a proposed ground-based experiment to measure Inflation parameters and Dark Energy from galaxy redshifts at . In order to achieve path-breaking results with a mid-scale investment, the MegaMapper combines existing technologies for critical path elements and pushes innovative development in other design areas. To this aim, we envision a 6.5-m Magellan-like telescope, with a newly designed wide field, coupled with DESI spectrographs, and small-pitch robots to achieve multiplexing of at least 26,000. This will match the expected achievable target density in the redshift range of interest and provide a 10x capability over the existing state-of the art, without a 10x increase in project budget.

Dark Energy Survey Year 3 results: Cosmological constraints from galaxy clustering and galaxy-galaxy lensing using the MagLim lens sample

Authors

Anna Porredon,M Crocce,J Elvin-Poole,R Cawthon,G Giannini,J De Vicente,A Carnero Rosell,Ismael Ferrero,E Krause,X Fang,J Prat,M Rodriguez-Monroy,S Pandey,A Pocino,FJ Castander,A Choi,A Amon,I Tutusaus,S Dodelson,I Sevilla-Noarbe,P Fosalba,E Gaztanaga,A Alarcon,O Alves,F Andrade-Oliveira,E Baxter,K Bechtol,MR Becker,GM Bernstein,J Blazek,H Camacho,A Campos,M Carrasco Kind,P Chintalapati,J Cordero,J DeRose,E Di Valentino,C Doux,TF Eifler,S Everett,A Ferté,O Friedrich,M Gatti,D Gruen,I Harrison,WG Hartley,K Herner,EM Huff,D Huterer,B Jain,M Jarvis,S Lee,P Lemos,N MacCrann,J Mena-Fernández,J Muir,J Myles,Y Park,M Raveri,R Rosenfeld,AJ Ross,ES Rykoff,S Samuroff,C Sánchez,E Sanchez,J Sanchez,D Sanchez Cid,D Scolnic,LF Secco,E Sheldon,A Troja,MA Troxel,N Weaverdyck,B Yanny,Joseph Zuntz,TMC Abbott,M Aguena,S Allam,J Annis,S Avila,D Bacon,E Bertin,S Bhargava,D Brooks,E Buckley-Geer,DL Burke,J Carretero,M Costanzi,LN Da Costa,MES Pereira,TM Davis,S Desai,HT Diehl,JP Dietrich,P Doel,A Drlica-Wagner,K Eckert,AE Evrard,B Flaugher,J Frieman,J García-Bellido,DW Gerdes,T Giannantonio,RA Gruendl,J Gschwend,G Gutierrez,SR Hinton,DL Hollowood,K Honscheid,B Hoyle,DJ James,K Kuehn,N Kuropatkin,O Lahav,C Lidman,M Lima,H Lin,MAG Maia,JL Marshall,P Martini,P Melchior,F Menanteau,R Miquel,JJ Mohr,R Morgan,RLC Ogando,A Palmese,F Paz-Chinchón,D Petravick,A Pieres,AA Plazas Malagón,AK Romer,B Santiago,V Scarpine,M Schubnell,S Serrano,M Smith,M Soares-Santos,E Suchyta,G Tarle,D Thomas,C To,TN Varga,J Weller,DES Collaboration

Journal

Physical Review D

Published Date

2022/11/28

The cosmological information extracted from photometric surveys is most robust when multiple probes of the large scale structure of the Universe are used. Two of the most sensitive probes are the clustering of galaxies and the tangential shear of background galaxy shapes produced by those foreground galaxies, so-called galaxy-galaxy lensing. Combining the measurements of these two two-point functions leads to cosmological constraints that are independent of the way galaxies trace matter (the galaxy bias factor). The optimal choice of foreground, or lens, galaxies is governed by the joint, but conflicting requirements to obtain accurate redshift information and large statistics. We present cosmological results from the full 5000 deg 2 of the Dark Energy Survey’s first three years of observations (Y3) combining those two-point functions, using for the first time a magnitude-limited lens sample (MagLim) of 11 million …

The DES view of the Eridanus supervoid and the CMB cold spot

Authors

András Kovács,Niall Jeffrey,Marco Gatti,Chihway Chang,Lorne Whiteway,Nico Hamaus,Ofer Lahav,Giorgia Pollina,David Bacon,Tomasz Kacprzak,Ben Mawdsley,Seshadri Nadathur,D Zeurcher,Juan García-Bellido,A Alarcon,Alexandra Amon,Keith Bechtol,Gary M Bernstein,A Campos,A Carnero Rosell,M Carrasco Kind,Ross Cawthon,R Chen,Ami Choi,Juan Cordero,C Davis,Joseph DeRose,Cyrille Doux,Alex Drlica-Wagner,Kathleen Eckert,Franz Elsner,Jack Elvin-Poole,S Everett,Agnès Ferté,G Giannini,Daniel Gruen,Robert A Gruendl,Ian Harrison,William G Hartley,Kenneth Herner,Eric M Huff,Dragan Huterer,Nikolay Kuropatkin,Michael Jarvis,Pierre François Léget,Niall MacCrann,J McCullough,Jessica Muir,Justin Myles,A Navarro-Alsina,S Pandey,J Prat,Marco Raveri,RP Rollins,Ashley J Ross,Eli S Rykoff,C Sánchez,Lucas Frozza Secco,Ignacio Sevilla-Noarbe,E Sheldon,T Shin,MA Troxel,I Tutusaus,TN Varga,B Yanny,B Yin,Y Zhang,Joseph Zuntz,Michel Aguena,Sahar Allam,F Andrade-Oliveira,J Annis,E Bertin,D Brooks,D Burke,J Carretero,M Costanzi,LN Da Costa,Maria Elidaiana da Silva Pereira,T Davis,Juan De Vicente,S Desai,HT Diehl,Ismael Ferrero,B Flaugher,Pablo Fosalba,J Frieman,E Gaztañaga,D Gerdes,Tommaso Giannantonio,J Gschwend,G Gutierrez,S Hinton,Devon L Hollowood,Klaus Honscheid,D James,Kyler Kuehn,M Lima,Marcio AG Maia,Jennifer L Marshall,P Melchior,F Menanteau,R Miquel,R Morgan,R Ogando,Francisco Paz-Chinchón,A Pieres,Andrés A Plazas,M Rodriguez Monroy,K Romer,A Roodman,E Sanchez,M Schubnell,S Serrano,M Smith,Marcelle Soares-Santos,E Suchyta,Molly EC Swanson,G Tarle,D Thomas,Chun-Hao To,Jochen Weller

Journal

Monthly Notices of the Royal Astronomical Society

Published Date

2022/2

The Cold Spot is a puzzling large-scale feature in the Cosmic Microwave Background temperature maps and its origin has been subject to active debate. As an important foreground structure at low redshift, the Eridanus supervoid was recently detected, but it was subsequently determined that, assuming the standard ΛCDM model, only about 10–20 per cent of the observed temperature depression can be accounted for via its Integrated Sachs–Wolfe imprint. However, R ≳ 100 h−1Mpc supervoids elsewhere in the sky have shown ISW imprints AISW ≈ 5.2 ± 1.6 times stronger than expected from ΛCDM (AISW = 1), which warrants further inspection. Using the Year-3 redMaGiC catalogue of luminous red galaxies from the Dark Energy Survey, here we confirm the detection of the Eridanus supervoid as a significant underdensity in the Cold Spot’s direction at z < 0.2. We also show, with S/N ≳ 5 significance, that …

The Observed Evolution of the Stellar Mass–Halo Mass Relation for Brightest Central Galaxies

Authors

Jesse B Golden-Marx,CJ Miller,Y Zhang,RLC Ogando,A Palmese,TMC Abbott,M Aguena,S Allam,F Andrade-Oliveira,J Annis,D Bacon,E Bertin,D Brooks,E Buckley-Geer,A Carnero Rosell,M Carrasco Kind,FJ Castander,M Costanzi,M Crocce,LN Da Costa,MES Pereira,J De Vicente,S Desai,HT Diehl,P Doel,A Drlica-Wagner,S Everett,AE Evrard,Ismael Ferrero,B Flaugher,P Fosalba,J Frieman,J Garcia-Bellido,E Gaztanaga,DW Gerdes,D Gruen,RA Gruendl,J Gschwend,G Gutierrez,WG Hartley,SR Hinton,DL Hollowood,K Honscheid,B Hoyle,DJ James,T Jeltema,AG Kim,E Krause,K Kuehn,N Kuropatkin,O Lahav,M Lima,MAG Maia,JL Marshall,P Melchior,F Menanteau,R Miquel,JJ Mohr,R Morgan,F Paz-Chinchon,D Petravick,A Pieres,AA Plazas Malagón,J Prat,AK Romer,E Sanchez,B Santiago,V Scarpine,M Schubnell,S Serrano,I Sevilla-Noarbe,M Smith,M Soares-Santos,Eric Suchyta,G Tarle,TN Varga,DES Collaboration

Journal

The Astrophysical Journal

Published Date

2022/3/24

We quantify evolution in the cluster-scale stellar mass–halo mass (SMHM) relation's parameters using 2323 clusters and brightest central galaxies (BCGs) over the redshift range 0.03≤ z≤ 0.60. The precision on the inferred SMHM parameters is improved by including the magnitude gap (m gap) between the BCG and fourth-brightest cluster member (M14) as a third parameter in the SMHM relation. At fixed halo mass, accounting for m gap, through a stretch parameter, reduces the SMHM relation's intrinsic scatter. To explore this redshift range, we use clusters, BCGs, and cluster members identified using the Sloan Digital Sky Survey C4 and redMaPPer cluster catalogs and the Dark Energy Survey redMaPPer catalog. Through this joint analysis, we detect no systematic differences in BCG stellar mass, m gap, and cluster mass (inferred from richness) between the data sets. We utilize the Pareto function to quantify …

Dark Energy Survey Year 3 results: Exploiting small-scale information with lensing shear ratios

Authors

Carles Sánchez,Judit Prat,G Zacharegkas,S Pandey,E Baxter,GM Bernstein,J Blazek,R Cawthon,C Chang,E Krause,P Lemos,Y Park,M Raveri,J Sanchez,MA Troxel,A Amon,X Fang,O Friedrich,D Gruen,A Porredon,LF Secco,S Samuroff,A Alarcon,O Alves,F Andrade-Oliveira,K Bechtol,MR Becker,H Camacho,A Campos,A Carnero Rosell,M Carrasco Kind,R Chen,A Choi,M Crocce,C Davis,J De Vicente,J DeRose,E Di Valentino,HT Diehl,S Dodelson,C Doux,A Drlica-Wagner,K Eckert,TF Eifler,F Elsner,J Elvin-Poole,S Everett,A Ferté,P Fosalba,M Gatti,G Giannini,RA Gruendl,I Harrison,WG Hartley,K Herner,EM Huff,D Huterer,M Jarvis,B Jain,N Kuropatkin,P-F Leget,N MacCrann,J McCullough,J Muir,J Myles,A Navarro-Alsina,RP Rollins,A Roodman,R Rosenfeld,ES Rykoff,I Sevilla-Noarbe,E Sheldon,T Shin,A Troja,I Tutusaus,TN Varga,RH Wechsler,B Yanny,B Yin,Y Zhang,Joseph Zuntz,TMC Abbott,M Aguena,S Allam,D Bacon,E Bertin,S Bhargava,D Brooks,E Buckley-Geer,DL Burke,J Carretero,M Costanzi,LN Da Costa,MES Pereira,S Desai,JP Dietrich,P Doel,AE Evrard,Ismael Ferrero,B Flaugher,J Frieman,J García-Bellido,E Gaztanaga,DW Gerdes,T Giannantonio,J Gschwend,G Gutierrez,SR Hinton,DL Hollowood,K Honscheid,B Hoyle,DJ James,K Kuehn,O Lahav,M Lima,H Lin,MAG Maia,JL Marshall,P Martini,P Melchior,F Menanteau,R Miquel,JJ Mohr,R Morgan,A Palmese,F Paz-Chinchón,D Petravick,A Pieres,AA Plazas Malagón,M Rodriguez-Monroy,E Sanchez,V Scarpine,M Schubnell,S Serrano,M Smith,M Soares-Santos,E Suchyta,MEC Swanson,G Tarle,D Thomas,C To,DES Collaboration

Journal

Physical Review D

Published Date

2022/4/26

Using the first three years of data from the Dark Energy Survey (DES), we use ratios of small-scale galaxy-galaxy lensing measurements around the same lens sample to constrain source redshift uncertainties, intrinsic alignments and other systematics or nuisance parameters of our model. Instead of using a simple geometric approach for the ratios as has been done in the past, we use the full modeling of the galaxy-galaxy lensing measurements, including the corresponding integration over the power spectrum and the contributions from intrinsic alignments and lens magnification. We perform extensive testing of the small-scale shear-ratio (SR) modeling by studying the impact of different effects such as the inclusion of baryonic physics, nonlinear biasing, halo occupation distribution descriptions and lens magnification, among others, and using realistic N-body simulations of the DES data. We validate the …

Milky Way satellite census. IV. Constraints on decaying dark matter from observations of Milky Way satellite galaxies

Authors

Sidney Mau,EO Nadler,RH Wechsler,A Drlica-Wagner,K Bechtol,G Green,D Huterer,TS Li,Y-Y Mao,CE Martínez-Vázquez,M McNanna,B Mutlu-Pakdil,AB Pace,A Peter,AH Riley,L Strigari,M-Y Wang,M Aguena,S Allam,J Annis,D Bacon,E Bertin,S Bocquet,D Brooks,DL Burke,A Carnero Rosell,M Carrasco Kind,J Carretero,M Costanzi,M Crocce,MES Pereira,TM Davis,J De Vicente,S Desai,P Doel,Ismael Ferrero,B Flaugher,J Frieman,J García-Bellido,M Gatti,G Giannini,D Gruen,RA Gruendl,J Gschwend,G Gutierrez,SR Hinton,DL Hollowood,K Honscheid,DJ James,K Kuehn,O Lahav,MAG Maia,JL Marshall,R Miquel,JJ Mohr,R Morgan,RLC Ogando,F Paz-Chinchón,A Pieres,M Rodriguez-Monroy,E Sanchez,V Scarpine,S Serrano,I Sevilla-Noarbe,Eric Suchyta,G Tarle,C To,DL Tucker,J Weller,DES Collaboration

Journal

The Astrophysical Journal

Published Date

2022/6/27

We use a recent census of the Milky Way (MW) satellite galaxy population to constrain the lifetime of particle dark matter (DM). We consider two-body decaying dark matter (DDM) in which a heavy DM particle decays with lifetime τ comparable to the age of the universe to a lighter DM particle (with mass splitting epsilon) and to a dark radiation species. These decays impart a characteristic" kick velocity," V kick= epsilon c, on the DM daughter particles, significantly depleting the DM content of low-mass subhalos and making them more susceptible to tidal disruption. We fit the suppression of the present-day DDM subhalo mass function (SHMF) as a function of τ and V kick using a suite of high-resolution zoom-in simulations of MW-mass halos, and we validate this model on new DDM simulations of systems specifically chosen to resemble the MW. We implement our DDM SHMF predictions in a forward model that …

Review of particle physics

Authors

Particle Data Group,RL Workman,VD Burkert,V Crede,E Klempt,U Thoma,L Tiator,K Agashe,G Aielli,BC Allanach,C Amsler,M Antonelli,EC Aschenauer,DM Asner,H Baer,Sw Banerjee,RM Barnett,L Baudis,CW Bauer,JJ Beatty,VI Belousov,J Beringer,A Bettini,O Biebel,KM Black,E Blucher,R Bonventre,VV Bryzgalov,O Buchmuller,MA Bychkov,RN Cahn,M Carena,A Ceccucci,A Cerri,R Sekhar Chivukula,G Cowan,K Cranmer,O Cremonesi,G D'Ambrosio,T Damour,D de Florian,A de Gouvêa,T DeGrand,P de Jong,S Demers,BA Dobrescu,M D'Onofrio,M Doser,HK Dreiner,P Eerola,U Egede,S Eidelman,AX El-Khadra,J Ellis,SC Eno,J Erler,VV Ezhela,W Fetscher,BD Fields,A Freitas,H Gallagher,Y Gershtein,T Gherghetta,MC Gonzalez-Garcia,M Goodman,C Grab,AV Gritsan,C Grojean,DE Groom,M Grünewald,A Gurtu,T Gutsche,HE Haber,Matthieu Hamel,C Hanhart,S Hashimoto,Y Hayato,A Hebecker,S Heinemeyer,JJ Hernández-Rey,K Hikasa,J Hisano,A Höcker,J Holder,L Hsu,J Huston,T Hyodo,Al Ianni,M Kado,M Karliner,UF Katz,M Kenzie,VA Khoze,SR Klein,F Krauss,M Kreps,P Križan,B Krusche,Y Kwon,O Lahav,J Laiho,LP Lellouch,J Lesgourgues,AR Liddle,Z Ligeti,CJ Lin,C Lippmann,TM Liss,L Littenberg,C Lourenço,KS Lugovsky,SB Lugovsky,A Lusiani,Y Makida,F Maltoni,T Mannel,AV Manohar,WJ Marciano,A Masoni,J Matthews,UG Meißner,IA Melzer-Pellmann,M Mikhasenko,DJ Miller,D Milstead,RE Mitchell,K Mönig,P Molaro,F Moortgat,M Moskovic,K Nakamura,M Narain,P Nason,S Navas,A Nelles,M Neubert,P Nevski,Y Nir,KA Olive,C Patrignani,JA Peacock,VA Petrov,E Pianori,A Pich,A Piepke,F Pietropaolo,A Pomarol,S Pordes,S Profumo,A Quadt

Journal

Progress of theoretical and experimental physics

Published Date

2022/8

The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 2,143 new measurements from 709 papers, we list, evaluate, and average measured properties of gauge bosons and the recently discovered Higgs boson, leptons, quarks, mesons, and baryons. We summarize searches for hypothetical particles such as supersymmetric particles, heavy bosons, axions, dark photons, etc. Particle properties and search limits are listed in Summary Tables. We give numerous tables, figures, formulae, and reviews of topics such as Higgs Boson Physics, Supersymmetry, Grand Unified Theories, Neutrino Mixing, Dark Energy, Dark Matter, Cosmology, Particle Detectors, Colliders, Probability and Statistics. Among the 120 reviews are many that are new or heavily revised, including a new review on Machine Learning, and one on Spectroscopy of Light Meson Resonances …

VizieR Online Data Catalog: High-redshift strong lens candidates from DES (Jacobs+, 2019)

Authors

C Jacobs,T Collett,K Glazebrook,C McCarthy,AK Qin,TMC Abbott,FB Abdalla,J Annis,S Avila,K Bechtol,E Bertin,D Brooks,E Buckley-Geer,DL Burke,A Carnero Rosell,M Carrasco Kind,J Carretero,LN da Costa,C Davis,S Desai,HT Diehl,P Doel,TF Eifler,B Flaugher,J Frieman,J Garcia-Bellido,E Gaztanaga,DW Gerdes,DA Goldstein,D Gruen,RA Gruendl,J Gschwend,G Gutierrez,WG Hartley,DL Hollowood,K Honscheid,B Hoyle,DJ James,K Kuehn,N Kuropatkin,O Lahav,TS Li,M Lima,H Lin,MAG Maia,P Martini,CJ Miller,R Miquel,B Nord,AA Plazas,E Sanchez,V Scarpine,M Schubnell,S Serrano,I Sevilla-Noarbe,M Smith,M Soares-Santos,F Sobreira,E Suchyta,MEC Swanson,G Tarle,V Vikram,AR Walker,Y Zhang,J Zuntz

Journal

VizieR Online Data Catalog

Published Date

2022/6

We search Dark Energy Survey (DES) Year 3 imaging data for galaxy-galaxy strong gravitational lenses using convolutional neural networks. We generate 250000 simulated lenses at redshifts> 0.8 from which we create a data set for training the neural networks with realistic seeing, sky and shot noise. Using the simulations as a guide, we build a catalogue of 1.1 million DES sources with 1.8< gi< 5, 0.6< gr< 3, rmag> 19, g_mag> 20, and imag> 18.2. We train two ensembles of neural networks on training sets consisting of simulated lenses, simulated non-lenses, and real sources. We use the neural networks to score images of each of the sources in our catalogue with a value from 0 to 1, and select those with scores greater than a chosen threshold for visual inspection, resulting in a candidate set of 7301 galaxies. During visual inspection, we rate 84 as" probably" or" definitely" lenses. Four of these are previously …

A Spectroscopic Road Map for Cosmic Frontier: DESI, DESI-II, Stage-5

Authors

David J Schlegel,Simone Ferraro,Greg Aldering,Charles Baltay,Segev Benzvi,Robert Besuner,Guillermo A Blanc,Adam S Bolton,Ana Bonaca,David Brooks,Elizabeth Buckley-Geer,Zheng Cai,Joseph Derose,Arjun Dey,Peter Doel,Alex Drlica-Wagner,Xiaohui Fan,Gaston Gutierrez,Daniel Green,Julien Guy,Dragan Huterer,Leopoldo Infante,Patrick Jelinsky,Dionysios Karagiannis,Stephen M Kent,Alex G Kim,Jean-Paul Kneib,Juna A Kollmeier,Anthony Kremin,Ofer Lahav,Martin Landriau,Dustin Lang,Alexie Leauthaud,Michael E Levi,Eric V Linder,Christophe Magneville,Paul Martini,Patrick McDonald,Christopher J Miller,Adam D Myers,Jeffrey A Newman,Peter E Nugent,Nathalie Palanque-Delabrouille,Nikhil Padmanabhan,Antonella Palmese,Claire Poppett,Jason X Prochaska,Anand Raichoor,Solange Ramirez,Noah Sailer,Emmanuel Schaan,Michael Schubnell,Uros Seljak,Hee-Jong Seo,Joseph Silber,Joshua D Simon,Zachary Slepian,Marcelle Soares-Santos,Greg Tarlé,Monica Valluri,Noah J Weaverdyck,Risa H Wechsler,Martin White,Christophe Yèche,Rongpu Zhou

Journal

arXiv preprint arXiv:2209.03585

Published Date

2022/9/8

In this white paper, we present an experimental road map for spectroscopic experiments beyond DESI. DESI will be a transformative cosmological survey in the 2020s, mapping 40 million galaxies and quasars and capturing a significant fraction of the available linear modes up to z=1.2. DESI-II will pilot observations of galaxies both at much higher densities and extending to higher redshifts. A Stage-5 experiment would build out those high-density and high-redshift observations, mapping hundreds of millions of stars and galaxies in three dimensions, to address the problems of inflation, dark energy, light relativistic species, and dark matter. These spectroscopic data will also complement the next generation of weak lensing, line intensity mapping and CMB experiments and allow them to reach their full potential.

Cosmic shear in harmonic space from the Dark Energy Survey Year 1 Data: compatibility with configuration space results

Authors

H Camacho,F Andrade-Oliveira,A Troja,R Rosenfeld,L Faga,R Gomes,C Doux,X Fang,M Lima,V Miranda,TF Eifler,O Friedrich,M Gatti,GM Bernstein,J Blazek,SL Bridle,A Choi,C Davis,J DeRose,E Gaztanaga,D Gruen,WG Hartley,B Hoyle,M Jarvis,N MacCrann,J Prat,MM Rau,S Samuroff,C Sánchez,E Sheldon,MA Troxel,P Vielzeuf,J Zuntz,TMC Abbott,M Aguena,S Allam,J Annis,D Bacon,E Bertin,D Brooks,DL Burke,A Carnero Rosell,M Carrasco Kind,J Carretero,FJ Castander,R Cawthon,M Costanzi,LN Da Costa,MES Pereira,J De Vicente,S Desai,HT Diehl,P Doel,S Everett,AE Evrard,I Ferrero,B Flaugher,P Fosalba,D Friedel,J Frieman,J García-Bellido,DW Gerdes,RA Gruendl,J Gschwend,G Gutierrez,SR Hinton,DL Hollowood,K Honscheid,D Huterer,DJ James,K Kuehn,N Kuropatkin,O Lahav,MAG Maia,JL Marshall,P Melchior,F Menanteau,R Miquel,R Morgan,F Paz-Chinchón,D Petravick,A Pieres,AA Plazas Malagón,K Reil,M Rodriguez-Monroy,E Sanchez,V Scarpine,M Schubnell,S Serrano,I Sevilla-Noarbe,M Smith,M Soares-Santos,E Suchyta,G Tarle,D Thomas,C To,TN Varga,J Weller,RD Wilkinson,(DES Collaboration)

Journal

Monthly Notices of the Royal Astronomical Society

Published Date

2022/11

We perform a cosmic shear analysis in harmonic space using the first year of data collected by the Dark Energy Survey (DES-Y1). We measure the cosmic weak lensing shear power spectra using the metacalibration catalogue and perform a likelihood analysis within the framework of CosmoSIS. We set scale cuts based on baryonic effects contamination and model redshift and shear calibration uncertainties as well as intrinsic alignments. We adopt as fiducial covariance matrix an analytical computation accounting for the mask geometry in the Gaussian term, including non-Gaussian contributions. A suite of 1200 lognormal simulations is used to validate the harmonic space pipeline and the covariance matrix. We perform a series of stress tests to gauge the robustness of the harmonic space analysis. Finally, we use the DES-Y1 pipeline in configuration space to perform a similar likelihood analysis and compare …

Probing gravity with the DES-CMASS sample and BOSS spectroscopy

Authors

Sujeong Lee,Eric M Huff,A Choi,J Elvin-Poole,C Hirata,Klaus Honscheid,Niall MacCrann,Ashley J Ross,Michael A Troxel,Tim F Eifler,Hui Kong,Agnès Ferté,J Blazek,Dragan Huterer,Adam Amara,A Campos,A Chen,Scott Dodelson,Pablo Lemos,CD Leonard,V Miranda,Jessica Muir,Marco Raveri,Lucas Frozza Secco,Noah Weaverdyck,Joseph Zuntz,Sarah L Bridle,Christopher Davis,J DeRose,M Gatti,Judit Prat,MM Rau,S Samuroff,C Sánchez,P Vielzeuf,Michel Aguena,Sahar Allam,A Amon,F Andrade-Oliveira,Gary M Bernstein,E Bertin,D Brooks,David L Burke,A Carnero Rosell,Matias Carrasco Kind,Jorge Carretero,FJ Castander,R Cawthon,Christopher Conselice,Matteo Costanzi,LN Da Costa,Maria Elidaiana da Silva Pereira,Juan De Vicente,S Desai,Herman T Diehl,Jörg P Dietrich,P Doel,S Everett,August E Evrard,Ismael Ferrero,Pablo Fosalba,J Frieman,Juan García-Bellido,Enrique Gaztanaga,David W Gerdes,Tommaso Giannantonio,Daniel Gruen,Robert A Gruendl,J Gschwend,G Gutierrez,WG Hartley,Samuel R Hinton,Devon L Hollowood,B Hoyle,DJ James,Kyler Kuehn,Nikolay Kuropatkin,Ofer Lahav,M Lima,Marcio AG Maia,M March,Jennifer L Marshall,Felipe Menanteau,R Miquel,Joseph J Mohr,R Morgan,A Palmese,Francisco Paz-Chinchón,Adriano Pieres,AA Plazas Malagón,A Roodman,E Sanchez,V Scarpine,M Schubnell,S Serrano,Ignacio Sevilla-Noarbe,E Sheldon,Mathew Smith,Eric Suchyta,Molly EC Swanson,Gregory Tarlé,Daniel Thomas,C To,TN Varga,Jochen Weller,(DES Collaboration)

Journal

Monthly Notices of the Royal Astronomical Society

Published Date

2022/2

The DES-CMASS sample (DMASS) is designed to optimally combine the weak lensing measurements from the Dark Energy Survey (DES) and redshift-space distortions (RSD) probed by the CMASS galaxy sample from the Baryonic Oscillation Spectroscopic Survey. In this paper, we demonstrate the feasibility of adopting DMASS as the equivalent of CMASS for a joint analysis of DES and BOSS in the framework of modified gravity. We utilize the angular clustering of the DMASS galaxies, cosmic shear of the DES metacalibration sources, and cross-correlation of the two as data vectors. By jointly fitting the combination of the data with the RSD measurements from the CMASS sample and Planck data, we obtain the constraints on modified gravity parameters and . Our constraints of modified gravity with DMASS are tighter than those with the DES Year 1 redMaGiC sample with the …

Method for separation of magnesium and calcium ions from saline water, for improving the quality of soft and desalinated waters

Published Date

2022/3/22

Provided is a novel Nanofiltration-DiaNanofiltration (NF-DiaNF) system and method for extracting divalent ions from saline water (eg, seawater) to produce solutions rich in divalent ions (in particular Mg2+, Ca2+ and SO42−), while minimizing the concentrations of undesirable species (eg, Cl−, Br−, B and Na+). The solutions may be added to water (eg, desalinated, soft, drinking or irrigation water) to enrich the water with divalent ions, thereby improving its quality.

Cross-correlation of Dark Energy Survey Year 3 lensing data with ACT and thermal Sunyaev-Zel’dovich effect observations. II. Modeling and constraints on …

Authors

S Pandey,M Gatti,E Baxter,JC Hill,X Fang,C Doux,G Giannini,M Raveri,J DeRose,H Huang,E Moser,N Battaglia,A Alarcon,A Amon,M Becker,A Campos,C Chang,R Chen,A Choi,K Eckert,J Elvin-Poole,S Everett,A Ferte,I Harrison,N Maccrann,J Mccullough,J Myles,A Navarro Alsina,J Prat,RP Rollins,C Sanchez,T Shin,M Troxel,I Tutusaus,B Yin,M Aguena,S Allam,F Andrade-Oliveira,GM Bernstein,E Bertin,B Bolliet,JR Bond,D Brooks,E Calabrese,A Carnero Rosell,M Carrasco Kind,J Carretero,R Cawthon,M Costanzi,M Crocce,LN Da Costa,MES Pereira,J De Vicente,S Desai,HT Diehl,JP Dietrich,P Doel,J Dunkley,AE Evrard,S Ferraro,I Ferrero,B Flaugher,P Fosalba,J García-Bellido,E Gaztanaga,DW Gerdes,T Giannantonio,D Gruen,RA Gruendl,J Gschwend,G Gutierrez,K Herner,AD Hincks,SR Hinton,DL Hollowood,K Honscheid,JP Hughes,D Huterer,B Jain,DJ James,T Jeltema,E Krause,K Kuehn,O Lahav,M Lima,M Lokken,MS Madhavacheril,MAG Maia,JJ Mcmahon,P Melchior,F Menanteau,R Miquel,JJ Mohr,K Moodley,R Morgan,F Nati,MD Niemack,L Page,A Palmese,F Paz-Chinchón,A Pieres,AA Plazas Malagón,M Rodriguez-Monroy,AK Romer,E Sanchez,V Scarpine,E Schaan,S Serrano,I Sevilla-Noarbe,E Sheldon,BD Sherwin,C Sifón,M Smith,M Soares-Santos,D Spergel,E Suchyta,MEC Swanson,G Tarle,D Thomas,C To,TN Varga,J Weller,EJ Wollack,Z Xu,DES and ACT Collaboration

Journal

Physical Review D

Published Date

2022/6/21

Hot, ionized gas leaves an imprint on the cosmic microwave background via the thermal Sunyaev-Zel’dovich (tSZ) effect. The cross-correlation of gravitational lensing (which traces the projected mass) with the tSZ effect (which traces the projected gas pressure) is a powerful probe of the thermal state of ionized baryons throughout the Universe and is sensitive to effects such as baryonic feedback. In a companion paper (Gatti et al. Phys. Rev. D 105, 123525 (2022)), we present tomographic measurements and validation tests of the cross-correlation between Galaxy shear measurements from the first three years of observations of the Dark Energy Survey and tSZ measurements from a combination of Atacama Cosmology Telescope and Planck observations. In this work, we use the same measurements to constrain models for the pressure profiles of halos across a wide range of halo mass and redshift. We find …

SOAR/Goodman spectroscopic assessment of candidate counterparts of the LIGO/Virgo event GW190814

Authors

Douglas L Tucker,MP Wiesner,SS Allam,Marcelle Soares-Santos,CR Bom,Melissa Butner,Alyssa Garcia,Robert Morgan,A Palmese,L Santana-Silva,A Shrivastava,J Annis,J García-Bellido,MSS Gill,K Herner,CD Kilpatrick,M Makler,N Sherman,A Amara,H Lin,M Smith,E Swann,I Arcavi,TG Bachmann,K Bechtol,F Berlfein,C Briceño,D Brout,RE Butler,R Cartier,J Casares,H-Y Chen,C Conselice,C Contreras,E Cook,J Cooke,K Dage,C D’Andrea,TM Davis,R de Carvalho,HT Diehl,JP Dietrich,Z Doctor,A Drlica-Wagner,M Drout,B Farr,DA Finley,M Fishbach,RJ Foley,F Förster-Burón,P Fosalba,D Friedel,J Frieman,C Frohmaier,RA Gruendl,WG Hartley,D Hiramatsu,DE Holz,DA Howell,A Kawash,R Kessler,N Kuropatkin,O Lahav,A Lundgren,M Lundquist,U Malik,AW Mann,J Marriner,JL Marshall,CE Martínez-Vázquez,C McCully,F Menanteau,N Meza,G Narayan,E Neilsen,C Nicolaou,R Nichol,F Paz-Chinchón,MES Pereira,J Pineda,S Points,J Quirola-Vásquez,S Rembold,A Rest,Ó Rodriguez,AK Romer,M Sako,S Salim,D Scolnic,JA Smith,J Strader,M Sullivan,MEC Swanson,D Thomas,S Valenti,TN Varga,AR Walker,J Weller,ML Wood,B Yanny,A Zenteno,M Aguena,F Andrade-Oliveira,E Bertin,D Brooks,DL Burke,A Carnero Rosell,M Carrasco Kind,J Carretero,M Costanzi,LN Da Costa,J De Vicente,S Desai,S Everett,I Ferrero,B Flaugher,E Gaztanaga,DW Gerdes,D Gruen,J Gschwend,G Gutierrez,SR Hinton,DL Hollowood,K Honscheid,DJ James,K Kuehn,M Lima,MAG Maia,R Miquel,RLC Ogando,A Pieres,AA Plazas Malagón,M Rodriguez-Monroy,E Sanchez,V Scarpine,M Schubnell,S Serrano,I Sevilla-Noarbe,E Suchyta,G Tarle,C To,Y Zhang,DES Collaboration

Journal

The Astrophysical Journal

Published Date

2022/4/19

On 2019 August 14 at 21: 10: 39 UTC, the LIGO/Virgo Collaboration (LVC) detected a possible neutron star–black hole merger (NSBH), the first ever identified. An extensive search for an optical counterpart of this event, designated GW190814, was undertaken using the Dark Energy Camera on the 4 m Victor M. Blanco Telescope at the Cerro Tololo Inter-American Observatory. Target of Opportunity interrupts were issued on eight separate nights to observe 11 candidates using the 4.1 m Southern Astrophysical Research (SOAR) telescope's Goodman High Throughput Spectrograph in order to assess whether any of these transients was likely to be an optical counterpart of the possible NSBH merger. Here, we describe the process of observing with SOAR, the analysis of our spectra, our spectroscopic typing methodology, and our resultant conclusion that none of the candidates corresponded to the gravitational …

The dark energy survey 5-yr photometrically identified type Ia supernovae

Authors

Anais Möller,M Smith,M Sako,M Sullivan,M Vincenzi,P Wiseman,P Armstrong,J Asorey,D Brout,D Carollo,TM Davis,C Frohmaier,L Galbany,K Glazebrook,L Kelsey,R Kessler,GF Lewis,C Lidman,U Malik,RC Nichol,D Scolnic,BE Tucker,TMC Abbott,M Aguena,S Allam,J Annis,E Bertin,S Bocquet,D Brooks,DL Burke,A Carnero Rosell,M Carrasco Kind,J Carretero,FJ Castander,C Conselice,M Costanzi,M Crocce,LN Da Costa,J De Vicente,S Desai,HT Diehl,P Doel,S Everett,Ismael Ferrero,DA Finley,B Flaugher,D Friedel,J Frieman,J García-Bellido,DW Gerdes,D Gruen,RA Gruendl,J Gschwend,G Gutierrez,K Herner,SR Hinton,DL Hollowood,K Honscheid,DJ James,K Kuehn,N Kuropatkin,O Lahav,M March,JL Marshall,F Menanteau,R Miquel,R Morgan,A Palmese,F Paz-Chinchón,A Pieres,AA Plazas Malagón,AK Romer,A Roodman,E Sanchez,V Scarpine,M Schubnell,S Serrano,I Sevilla-Noarbe,E Suchyta,G Tarle,D Thomas,C To,TN Varga

Journal

Monthly Notices of the Royal Astronomical Society

Published Date

2022/8

As part of the cosmology analysis using Type Ia Supernovae (SN Ia) in the Dark Energy Survey (DES), we present photometrically identified SN Ia samples using multiband light curves and host galaxy redshifts. For this analysis, we use the photometric classification framework SuperNNovatrained on realistic DES-like simulations. For reliable classification, we process the DES SN programme (DES-SN) data and introduce improvements to the classifier architecture, obtaining classification accuracies of more than 98 per cent on simulations. This is the first SN classification to make use of ensemble methods, resulting in more robust samples. Using photometry, host galaxy redshifts, and a classification probability requirement, we identify 1863 SNe Ia from which we select 1484 cosmology-grade SNe Ia spanning the redshift range of 0.07 < z < 1.14. We find good agreement between the light-curve properties of …

Finding quadruply imaged quasars with machine learning–I. Methods

Authors

A Akhazhanov,A More,A Amini,C Hazlett,T Treu,S Birrer,A Shajib,K Liao,C Lemon,A Agnello,B Nord,Michel Aguena,Sahar Allam,Felipe Andrade-Oliveira,J Annis,D Brooks,E Buckley-Geer,David L Burke,Aurelio Carnero Rosell,Matias Carrasco Kind,J Carretero,A Choi,C Conselice,M Costanzi,LN Da Costa,MES Pereira,J De Vicente,S Desai,JP Dietrich,P Doel,S Everett,Ismael Ferrero,DA Finley,Brenna Flaugher,Josh Frieman,Juan García-Bellido,David W Gerdes,D Gruen,Robert A Gruendl,J Gschwend,G Gutierrez,Samuel R Hinton,Devon L Hollowood,Klaus Honscheid,DJ James,AG Kim,K Kuehn,Nikolay Kuropatkin,Ofer Lahav,M Lima,H Lin,Marcio AG Maia,M March,Felipe Menanteau,R Miquel,R Morgan,Antonella Palmese,Francisco Paz-Chinchón,A Pieres,Andrés A Plazas Malagón,E Sanchez,Vic Scarpine,S Serrano,Ignacio Sevilla-Noarbe,M Smith,Marcelle Soares-Santos,Eric Suchyta,Molly EC Swanson,Gregory Tarlé,C To,Tamas Norbert Varga,Jochen Weller,(DES Collaboration)

Journal

Monthly Notices of the Royal Astronomical Society

Published Date

2022/6

Strongly lensed quadruply imaged quasars (quads) are extraordinary objects. They are very rare in the sky and yet they provide unique information about a wide range of topics, including the expansion history and the composition of the Universe, the distribution of stars and dark matter in galaxies, the host galaxies of quasars, and the stellar initial mass function. Finding them in astronomical images is a classic ‘needle in a haystack’ problem, as they are outnumbered by other (contaminant) sources by many orders of magnitude. To solve this problem, we develop state-of-the-art deep learning methods and train them on realistic simulated quads based on real images of galaxies taken from the Dark Energy Survey, with realistic source and deflector models, including the chromatic effects of microlensing. The performance of the best methods on a mixture of simulated and real objects is excellent, yielding area …

Dark Energy Survey Year 3 results: Imprints of cosmic voids and superclusters in the Planck CMB lensing map

Authors

A Kovács,P Vielzeuf,Ismael Ferrero,P Fosalba,U Demirbozan,R Miquel,C Chang,N Hamaus,G Pollina,K Bechtol,M Becker,A Carnero Rosell,M Carrasco Kind,R Cawthon,M Crocce,A Drlica-Wagner,J Elvin-Poole,M Gatti,G Giannini,RA Gruendl,A Porredon,AJ Ross,ES Rykoff,I Sevilla-Noarbe,E Sheldon,B Yanny,T Abbott,M Aguena,S Allam,J Annis,D Bacon,G Bernstein,E Bertin,S Bocquet,D Brooks,D Burke,J Carretero,FJ Castander,M Costanzi,LN Da Costa,MES Pereira,J De Vicente,S Desai,HT Diehl,J Dietrich,A Ferté,B Flaugher,J Frieman,J Garcia-Bellido,E Gaztañaga,D Gerdes,T Giannantonio,D Gruen,J Gschwend,G Gutierrez,S Hinton,DL Hollowood,K Honscheid,D Huterer,K Kuehn,O Lahav,M Lima,M March,J Marshall,P Melchior,F Menanteau,R Morgan,J Muir,R Ogando,A Palmese,F Paz-Chinchon,A Pieres,A Plazas Malagón,M Rodriguez Monroy,A Roodman,E Sanchez,M Schubnell,S Serrano,M Smith,E Suchyta,G Tarle,D Thomas,CH To,TN Varga,J Weller

Journal

Monthly Notices of the Royal Astronomical Society

Published Date

2022/9

The CMB lensing signal from cosmic voids and superclusters probes the growth of structure in the low-redshift cosmic web. In this analysis, we cross-correlated the Planck CMB lensing map with voids detected in the Dark Energy Survey Year 3 (Y3) data set (∼5000 deg2), expanding on previous measurements that used Y1 catalogues (∼1300 deg2). Given the increased statistical power compared to Y1 data, we report a 6.6σ detection of negative CMB convergence (κ) imprints using approximately 3600 voids detected from a redMaGiC luminous red galaxy sample. However, the measured signal is lower than expected from the MICE N-body simulation that is based on the ΛCDM model (parameters Ωm = 0.25, σ8 = 0.8), and the discrepancy is associated mostly with the void centre region. Considering the full void lensing profile, we fit an amplitude to a simulation-based template with fixed …

Overview of the instrumentation for the dark energy spectroscopic instrument

Authors

Behzad Abareshi,J Aguilar,S Ahlen,Shadab Alam,David M Alexander,R Alfarsy,L Allen,C Allende Prieto,O Alves,J Ameel,E Armengaud,J Asorey,Alejandro Aviles,S Bailey,A Balaguera-Antolínez,O Ballester,C Baltay,A Bault,SF Beltran,B Benavides,S BenZvi,A Berti,R Besuner,Florian Beutler,D Bianchi,C Blake,P Blanc,R Blum,A Bolton,S Bose,D Bramall,S Brieden,A Brodzeller,D Brooks,C Brownewell,E Buckley-Geer,RN Cahn,Z Cai,R Canning,R Capasso,A Carnero Rosell,P Carton,R Casas,FJ Castander,JL Cervantes-Cota,S Chabanier,E Chaussidon,C Chuang,C Circosta,S Cole,AP Cooper,L da Costa,M-C Cousinou,A Cuceu,TM Davis,K Dawson,R De la Cruz-Noriega,A de la Macorra,A de Mattia,J Della Costa,P Demmer,M Derwent,A Dey,B Dey,G Dhungana,Z Ding,C Dobson,P Doel,J Donald-McCann,J Donaldson,K Douglass,Y Duan,P Dunlop,J Edelstein,S Eftekharzadeh,DJ Eisenstein,M Enriquez-Vargas,S Escoffier,M Evatt,P Fagrelius,X Fan,K Fanning,VA Fawcett,S Ferraro,J Ereza,B Flaugher,A Font-Ribera,JE Forero-Romero,CS Frenk,S Fromenteau,BT Gänsicke,C Garcia-Quintero,L Garrison,E Gaztañaga,F Gerardi,H Gil-Marín,S Gontcho A Gontcho,Alma X Gonzalez-Morales,G Gonzalez-de-Rivera,V Gonzalez-Perez,C Gordon,O Graur,D Green,C Grove,D Gruen,G Gutierrez,J Guy,C Hahn,S Harris,D Herrera,Hiram K Herrera-Alcantar,K Honscheid,C Howlett,D Huterer,V Iršič,M Ishak,P Jelinsky,L Jiang,J Jimenez,YP Jing,R Joyce,E Jullo,S Juneau,NG Karaçaylı,M Karamanis,A Karcher,T Karim,R Kehoe,S Kent,D Kirkby,T Kisner,F Kitaura,SE Koposov,A Kovács,A Kremin,Alex Krolewski,B L’Huillier,O Lahav,A Lambert,C Lamman,Ting-Wen Lan,M Landriau,S Lane,D Lang,JU Lange,J Lasker,L Le Guillou,A Leauthaud,A Le Van Suu,Michael E Levi

Journal

The Astronomical Journal

Published Date

2022/10/20

The goal of the Dark Energy Spectroscopic Instrument (DESI) is to determine the nature of dark energy through the most precise measurement of the expansion history of the universe ever obtained (Levi et al. 2013). DESI was designed to meet the definition of a Stage IV dark energy survey with only a 5 yr observing campaign. The Stage IV definition was developed by the Dark Energy Task Force (DETF; Albrecht et al. 2006) to quantify the uncertainty on the dark energy equation of state parameter w0 and its evolution wa. The DETF Figure of Merit is the reciprocal of the area of the error ellipse in the w0–wa plane. DESI is a project of the US Department of Energy (DOE) Office of Science, and the project used DOE funds combined with contributions from private foundations and partners to build substantial new instrumentation that can meet this definition with a survey of at least 9000 deg2. The more ambitious …

Dark Energy Survey Year 3 Results: clustering redshifts – calibration of the weak lensing source redshift distributions with redMaGiC and BOSS/eBOSS

Authors

Marco Gatti,Giulia Giannini,Gary M Bernstein,A Alarcon,Justin Myles,A Amon,R Cawthon,M Troxel,J DeRose,S Everett,Ashley J Ross,Eli S Rykoff,J Elvin-Poole,J Cordero,Ian Harrison,Carles Sanchez,Judit Prat,Daniel Gruen,H Lin,Martin Crocce,E Rozo,TMC Abbott,Michel Aguena,Sahar Allam,James Annis,Santiago Avila,D Bacon,E Bertin,D Brooks,David L Burke,A Carnero Rosell,M Carrasco Kind,J Carretero,FJ Castander,A Choi,Christopher Conselice,Matteo Costanzi,M Crocce,LN da Costa,Maria Elidaiana da Silva Pereira,K Dawson,S Desai,HT Diehl,K Eckert,TF Eifler,August E Evrard,Ismael Ferrero,B Flaugher,Pablo Fosalba,J Frieman,Juan García-Bellido,E Gaztanaga,Tommaso Giannantonio,Robert A Gruendl,J Gschwend,SR Hinton,Devon L Hollowood,Klaus Honscheid,B Hoyle,Dragan Huterer,DJ James,Kyler Kuehn,Nikolay Kuropatkin,Ofer Lahav,M Lima,Niall MacCrann,Marcio AG Maia,M March,JL Marshall,P Melchior,F Menanteau,Ramon Miquel,Joseph J Mohr,R Morgan,Ricardo LC Ogando,Antonella Palmese,Francisco Paz-Chinchón,Will J Percival,Andrés A Plazas,M Rodriguez-Monroy,A Roodman,G Rossi,S Samuroff,E Sanchez,V Scarpine,Lucas Frozza Secco,S Serrano,Ignacio Sevilla-Noarbe,M Smith,Marcelle Soares-Santos,E Suchyta,Molly EC Swanson,G Tarle,D Thomas,C To,TN Varga,Jochen Weller,RD Wilkinson,(DES Collaboration)

Journal

Monthly Notices of the Royal Astronomical Society

Published Date

2022/2

We present the calibration of the Dark Energy Survey Year 3 (DES Y3) weak lensing (WL) source galaxy redshift distributions n(z) from clustering measurements. In particular, we cross-correlate the WL source galaxies sample with redMaGiC galaxies (luminous red galaxies with secure photometric redshifts) and a spectroscopic sample from BOSS/eBOSS to estimate the redshift distribution of the DES sources sample. Two distinct methods for using the clustering statistics are described. The first uses the clustering information independently to estimate the mean redshift of the source galaxies within a redshift window, as done in the DES Y1 analysis. The second method establishes a likelihood of the clustering data as a function of n(z), which can be incorporated into schemes for generating samples of n(z) subject to combined clustering and photometric constraints. Both methods incorporate marginalization …

The Dark Energy Survey Bright Arcs Survey: candidate strongly lensed galaxy systems from the Dark Energy Survey 5000 square degree footprint

Authors

JH O’Donnell,RD Wilkinson,HT Diehl,C Aros-Bunster,K Bechtol,S Birrer,EJ Buckley-Geer,A Carnero Rosell,M Carrasco Kind,LN Da Costa,SJ Gonzalez Lozano,RA Gruendl,M Hilton,H Lin,KA Lindgren,J Martin,A Pieres,ES Rykoff,I Sevilla-Noarbe,E Sheldon,C Sifón,DL Tucker,B Yanny,TMC Abbott,M Aguena,S Allam,F Andrade-Oliveira,J Annis,E Bertin,D Brooks,DL Burke,J Carretero,M Costanzi,J De Vicente,S Desai,JP Dietrich,K Eckert,S Everett,Ismael Ferrero,B Flaugher,P Fosalba,J Frieman,J García-Bellido,E Gaztanaga,DW Gerdes,D Gruen,J Gschwend,MSS Gill,G Gutierrez,SR Hinton,DL Hollowood,K Honscheid,DJ James,T Jeltema,K Kuehn,O Lahav,M Lima,MAG Maia,JL Marshall,P Melchior,F Menanteau,R Miquel,R Morgan,B Nord,RLC Ogando,F Paz-Chinchón,MES Pereira,AA Plazas Malagón,M Rodriguez-Monroy,AK Romer,A Roodman,E Sanchez,V Scarpine,M Schubnell,S Serrano,M Smith,E Suchyta,MEC Swanson,G Tarle,D Thomas,C To,TN Varga,DES Collaboration

Journal

The Astrophysical Journal Supplement Series

Published Date

2022/3/9

We report the combined results of eight searches for strong gravitational lens systems in the full 5000 square degrees of Dark Energy Survey (DES) observations. The observations accumulated by the end of the third observing season fully covered the DES footprint in five filters (grizY), with an i-band limiting magnitude (at 10σ) of 23.44. In four searches, a list of potential candidates was identified using a color and magnitude selection from the object catalogs created from the first three observing seasons. Three other searches were conducted at the locations of previously identified galaxy clusters. Cutout images of potential candidates were then visually scanned using an object viewer. An additional set of candidates came from a data-quality check of a subset of the color–coadd tiles created from the full DES six-season data set. A short list of the most promising strong-lens candidates was then numerically ranked …

Dark energy survey year 3 results: Cosmology with peaks using an emulator approach

Authors

Dominik Zürcher,Janis Fluri,Raphaël Sgier,Tomasz Kacprzak,Marco Gatti,Cyrille Doux,Lorne Whiteway,Alexandre Refregier,Chihway Chang,Niall Jeffrey,Bhuvnesh Jain,Pablo Lemos,David Bacon,Alex Alarcon,Alexandra Amon,Keith Bechtol,Matthew Becker,Gary Bernstein,Andresa Campos,Rebecca Chen,A Choi,C Davis,J Derose,S Dodelson,F Elsner,J Elvin-Poole,S Everett,A Ferte,D Gruen,I Harrison,D Huterer,M Jarvis,PF Leget,N Maccrann,J Mccullough,J Muir,J Myles,A Navarro Alsina,S Pandey,J Prat,M Raveri,RP Rollins,A Roodman,C Sanchez,LF Secco,E Sheldon,T Shin,M Troxel,I Tutusaus,B Yin,M Aguena,S Allam,F Andrade-Oliveira,J Annis,E Bertin,D Brooks,D Burke,A Carnero Rosell,M Carrasco Kind,J Carretero,F Castander,R Cawthon,C Conselice,M Costanzi,L Da Costa,ME da Silva Pereira,T Davis,J De Vicente,S Desai,HT Diehl,J Dietrich,P Doel,K Eckert,A Evrard,Ismael Ferrero,B Flaugher,P Fosalba,D Friedel,J Frieman,J Garcia-Bellido,E Gaztanaga,D Gerdes,T Giannantonio,R Gruendl,J Gschwend,G Gutierrez,S Hinton,DL Hollowood,K Honscheid,B Hoyle,D James,K Kuehn,N Kuropatkin,O Lahav,C Lidman,M Lima,M Maia,J Marshall,P Melchior,F Menanteau,R Miquel,R Morgan,A Palmese,F Paz-Chinchon,A Pieres,A Plazas Malagón,K Reil,M Rodriguez Monroy,K Romer,E Sanchez,V Scarpine,M Schubnell,S Serrano,I Sevilla,M Smith,E Suchyta,G Tarle,D Thomas,C To,TN Varga,J Weller,R Wilkinson,(DES Collaboration)

Journal

Monthly Notices of the Royal Astronomical Society

Published Date

2022/4

We constrain the matter density Ωm and the amplitude of density fluctuations σ8 within the ΛCDM cosmological model with shear peak statistics and angular convergence power spectra using mass maps constructed from the first three years of data of the Dark Energy Survey (DES Y3). We use tomographic shear peak statistics, including cross-peaks: peak counts calculated on maps created by taking a harmonic space product of the convergence of two tomographic redshift bins. Our analysis follows a forward-modelling scheme to create a likelihood of these statistics using N-body simulations, using a Gaussian process emulator. We take into account the uncertainty from the remaining, largely unconstrained ΛCDM parameters (Ωb, ns, and h). We include the following lensing systematics: multiplicative shear bias, photometric redshift uncertainty, and galaxy intrinsic alignment. Stringent scale cuts are applied to avoid …

VizieR Online Data Catalog: TNOs from the full six years of DES (Bernardinelli+, 2022)

Authors

PH Bernardinelli,GM Bernstein,M Sako,B Yanny,M Aguena,S Allam,F Andrade-Oliveira,E Bertin,D Brooks,E Buckley-Geer,DL Burke,AC Rosell,M Carrasco Kind,J Carretero,C Conselice,M Costanzi,LN da Costa,S Desai,HT Diehl,JP Dietrich,P Doel,K Eckert,S Everett,I Ferrero,B Flaugher,P Fosalba,J Frieman,J Garcia-Bellido,DW Gerdes,D Gruen,RA Gruendl,J Gschwend,SR Hinton,DL Hollowood,K Honscheid,DJ James,S Kent,K Kuehn,N Kuropatkin,O Lahav,MAG Maia,M March,F Menanteau,R Miquel,R Morgan,J Myles,RLC Ogando,A Palmese,F Paz-Chinchon,A Pieres,AA Plazas Malagon,AK Romer,A Roodman,E Sanchez,V Scarpine,M Schubnell,S Serrano,I Sevilla-Noarbe,M Smith,M Soares-Santos,E Suchyta,MEC Swanson,G Tarle,C To,TN Varga,AR Walker,DES Collaboration

Journal

VizieR Online Data Catalog

Published Date

2022/5

We present a search for outer solar system objects in the 6yr of data from the Dark Energy Survey (DES). The DES covered a contiguous 5000deg 2 of the southern sky with~ 80000 3deg 2 exposures in the grizY filters between 2013 and 2019. This search yielded 812 trans-Neptunian objects (TNOs), one Centaur and one Oort cloud comet, 458 reported here for the first time. We present methodology that builds upon our previous search on the first 4yr of data. All images were reprocessed with an optimized detection pipeline that leads to an average completeness gain of 0.47 mag per exposure, as well as improved transient catalog production and algorithms for linkage of detections into orbits. All objects were verified by visual inspection and by the" sub-threshold significance", the signal-to-noise ratio in the stack of images in which its presence is indicated by the orbit, but no detection was reported. This yields a …

Dark Energy Survey Year 3 results: Cosmology from combined galaxy clustering and lensing validation on cosmological simulations

Authors

Joseph DeRose,RH Wechsler,MR Becker,ES Rykoff,S Pandey,N MacCrann,A Amon,J Myles,E Krause,D Gruen,B Jain,MA Troxel,J Prat,A Alarcon,C Sánchez,J Blazek,M Crocce,G Giannini,M Gatti,GM Bernstein,Joseph Zuntz,S Dodelson,X Fang,O Friedrich,LF Secco,J Elvin-Poole,A Porredon,S Everett,A Choi,I Harrison,J Cordero,M Rodriguez-Monroy,J McCullough,R Cawthon,A Chen,O Alves,F Andrade-Oliveira,K Bechtol,H Camacho,A Campos,A Carnero Rosell,M Carrasco Kind,HT Diehl,A Drlica-Wagner,K Eckert,TF Eifler,RA Gruendl,WG Hartley,H Huang,EM Huff,N Kuropatkin,M Raveri,R Rosenfeld,AJ Ross,J Sanchez,I Sevilla-Noarbe,E Sheldon,B Yanny,B Yin,Y Zhang,P Fosalba,M Aguena,S Allam,J Annis,S Avila,D Bacon,S Bhargava,D Brooks,E Buckley-Geer,DL Burke,J Carretero,FJ Castander,C Chang,M Costanzi,LN Da Costa,MES Pereira,J De Vicente,S Desai,JP Dietrich,P Doel,AE Evrard,Ismael Ferrero,A Ferté,B Flaugher,J Frieman,J García-Bellido,E Gaztanaga,T Giannantonio,J Gschwend,G Gutierrez,SR Hinton,DL Hollowood,K Honscheid,D Huterer,DJ James,K Kuehn,O Lahav,M Lima,MAG Maia,JL Marshall,P Melchior,F Menanteau,R Miquel,JJ Mohr,R Morgan,A Palmese,F Paz-Chinchón,D Petravick,A Pieres,AA Plazas Malagón,E Sanchez,V Scarpine,S Serrano,M Smith,M Soares-Santos,E Suchyta,G Tarle,D Thomas,C To,TN Varga,DES Collaboration

Journal

Physical Review D

Published Date

2022/6/17

We present a validation of the Dark Energy Survey Year 3 (DES Y3) 3× 2-point analysis choices by testing them on Buzzard 2.0, a new suite of cosmological simulations that is tailored for the testing and validation of combined galaxy clustering and weak-lensing analyses. We show that the buzzard 2.0 simulations accurately reproduce many important aspects of the DES Y3 data, including photometric redshift and magnitude distributions, and the relevant set of two-point clustering and weak-lensing statistics. We then show that our model for the 3× 2-point data vector is accurate enough to recover the true cosmology in simulated surveys assuming the true redshift distributions for our source and lens samples, demonstrating robustness to uncertainties in the modeling of the nonlinear matter power spectrum, nonlinear galaxy bias, and higher-order lensing corrections. Additionally, we demonstrate for the first time that …

Weak-lensing magnification of Type Ia supernovae from the Pantheon sample

Authors

Paul Shah,Pablo Lemos,Ofer Lahav

Journal

Monthly Notices of the Royal Astronomical Society

Published Date

2022/9

Using data from the Pantheon Type Ia supernovae (SN Ia) compilation and the Sloan Digital Sky Survey, we propose an estimator for weak-lensing convergence incorporating positional and photometric data of foreground galaxies. The correlation between this and the Hubble diagram residuals of the supernovae has 3.6σ significance, and is consistent with weak-lensing magnification due to dark matter haloes centred on galaxies. We additionally constrain the properties of the galactic haloes, such as the mass-to-light ratio Γ and radial profile of the halo matter density ρ(r). We derive a new relationship for the additional rms scatter in magnitudes caused by lensing, finding σlens = (0.06 ± 0.017)(dC(z)/dC(z = 1))3/2, where dC(z) is the comoving distance to redshift z. Hence, the scatter in apparent magnitudes due lensing will be of the same size as the intrinsic scatter of SN Ia by z ∼ 1.2. We propose a …

Velocity dispersions of clusters in the Dark Energy Survey Y3 redMaPPer catalogue

Authors

V Wetzell,TE Jeltema,B Hegland,S Everett,PA Giles,R Wilkinson,A Farahi,M Costanzi,DL Hollowood,E Upsdell,A Saro,J Myles,A Bermeo,S Bhargava,CA Collins,D Cross,O Eiger,G Gardner,M Hilton,J Jobel,P Kelly,D Laubner,AR Liddle,RG Mann,V Martinez,J Mayers,A McDaniel,AK Romer,P Rooney,Martin Sahlén,J Stott,A Swart,DJ Turner,PTP Viana,TMC Abbott,M Aguena,S Allam,F Andrade-Oliveira,J Annis,J Asorey,E Bertin,DL Burke,J Calcino,A Carnero Rosell,D Carollo,M Carrasco Kind,J Carretero,A Choi,M Crocce,LN Da Costa,MES Pereira,TM Davis,J De Vicente,S Desai,HT Diehl,JP Dietrich,P Doel,AE Evrard,Ismael Ferrero,P Fosalba,J Frieman,J García-Bellido,E Gaztanaga,K Glazebrook,D Gruen,RA Gruendl,J Gschwend,G Gutierrez,SR Hinton,K Honscheid,DJ James,K Kuehn,N Kuropatkin,O Lahav,GF Lewis,C Lidman,M Lima,MAG Maia,JL Marshall,P Melchior,F Menanteau,R Miquel,R Morgan,A Palmese,F Paz-Chinchón,AA Plazas Malagón,E Sanchez,V Scarpine,S Serrano,I Sevilla-Noarbe,M Smith,M Soares-Santos,E Suchyta,G Tarle,D Thomas,BE Tucker,DL Tucker,TN Varga,J Weller,(DES Collaboration)

Journal

Monthly Notices of the Royal Astronomical Society

Published Date

2022/8

We measure the velocity dispersions of clusters of galaxies selected by the red-sequence Matched-filter Probabilistic Percolation (redMaPPer) algorithm in the first three years of data from the Dark Energy Survey (DES), allowing us to probe cluster selection and richness estimation, λ, in light of cluster dynamics. Our sample consists of 126 clusters with sufficient spectroscopy for individual velocity dispersion estimates. We examine the correlations between cluster velocity dispersion, richness, X-ray temperature, and luminosity, as well as central galaxy velocity offsets. The velocity dispersion–richness relation exhibits a bimodal distribution. The majority of clusters follow scaling relations between velocity dispersion, richness, and X-ray properties similar to those found for previous samples; however, there is a significant population of clusters with velocity dispersions that are high for their richness. These clusters …

Measuring cosmological parameters with Type Ia supernovae in redMaGiC galaxies

Authors

Rebecca Chen,D Scolnic,E Rozo,Eli S Rykoff,B Popovic,R Kessler,M Vincenzi,Tamara M Davis,P Armstrong,D Brout,L Galbany,L Kelsey,C Lidman,A Möller,B Rose,M Sako,M Sullivan,G Taylor,P Wiseman,J Asorey,A Carr,C Conselice,K Kuehn,Geraint F Lewis,E Macaulay,M Rodriguez-Monroy,BE Tucker,TMC Abbott,M Aguena,Sahar Allam,F Andrade-Oliveira,J Annis,D Bacon,E Bertin,S Bocquet,D Brooks,DL Burke,A Carnero Rosell,M Carrasco Kind,J Carretero,R Cawthon,M Costanzi,Luiz N da Costa,Maria Elidaiana da Silva Pereira,S Desai,HT Diehl,P Doel,S Everett,Ismael Ferrero,B Flaugher,D Friedel,J Frieman,J García-Bellido,M Gatti,E Gaztanaga,D Gruen,SR Hinton,DL Hollowood,K Honscheid,DJ James,O Lahav,M Lima,M March,F Menanteau,R Miquel,R Morgan,A Palmese,F Paz-Chinchón,A Pieres,AA Plazas Malagón,J Prat,AK Romer,A Roodman,E Sanchez,M Schubnell,S Serrano,I Sevilla-Noarbe,M Smith,M Soares-Santos,E Suchyta,G Tarle,D Thomas,C To,DL Tucker,TN Varga,DES Collaboration

Journal

The Astrophysical Journal

Published Date

2022/10/13

Current and future cosmological analyses with Type Ia supernovae (SNe Ia) face three critical challenges:(i) measuring the redshifts from the SNe or their host galaxies;(ii) classifying the SNe without spectra; and (iii) accounting for correlations between the properties of SNe Ia and their host galaxies. We present here a novel approach that addresses each of these challenges. In the context of the Dark Energy Survey (DES), we analyze an SN Ia sample with host galaxies in the redMaGiC galaxy catalog, a selection of luminous red galaxies. redMaGiC photo-z estimates are expected to be accurate to σ Δz/(1+ z)∼ 0.02. The DES-5YR photometrically classified SN Ia sample contains approximately 1600 SNe, and 125 of these SNe are in redMaGiC galaxies. We demonstrate that redMaGiC galaxies almost exclusively host SNe Ia, reducing concerns relating to classification uncertainties. With this subsample, we find …

A search of the full six years of the Dark Energy Survey for outer solar system objects

Authors

Pedro H Bernardinelli,Gary M Bernstein,Masao Sako,Brian Yanny,M Aguena,S Allam,F Andrade-Oliveira,E Bertin,D Brooks,E Buckley-Geer,DL Burke,A Carnero Rosell,M Carrasco Kind,J Carretero,C Conselice,M Costanzi,LN Da Costa,J De Vicente,S Desai,HT Diehl,JP Dietrich,P Doel,K Eckert,S Everett,Ismael Ferrero,B Flaugher,P Fosalba,J Frieman,J García-Bellido,DW Gerdes,D Gruen,RA Gruendl,J Gschwend,SR Hinton,DL Hollowood,K Honscheid,DJ James,S Kent,K Kuehn,N Kuropatkin,O Lahav,MAG Maia,M March,F Menanteau,R Miquel,R Morgan,J Myles,RLC Ogando,A Palmese,F Paz-Chinchón,A Pieres,AA Plazas Malagón,AK Romer,A Roodman,E Sanchez,V Scarpine,M Schubnell,S Serrano,I Sevilla-Noarbe,M Smith,M Soares-Santos,E Suchyta,MEC Swanson,G Tarle,C To,TN Varga,AR Walker,DES Collaboration

Journal

The Astrophysical Journal Supplement Series

Published Date

2022/2/9

We present a search for outer solar system objects in the 6 yr of data from the Dark Energy Survey (DES). The DES covered a contiguous 5000 deg 2 of the southern sky with≈ 80,000 3 deg 2 exposures in the grizY filters between 2013 and 2019. This search yielded 812 trans-Neptunian objects (TNOs), one Centaur and one Oort cloud comet, 458 reported here for the first time. We present methodology that builds upon our previous search on the first 4 yr of data. All images were reprocessed with an optimized detection pipeline that leads to an average completeness gain of 0.47 mag per exposure, as well as improved transient catalog production and algorithms for linkage of detections into orbits. All objects were verified by visual inspection and by the" sub-threshold significance," the signal-to-noise ratio in the stack of images in which its presence is indicated by the orbit, but no detection was reported. This yields …

Dark energy survey year 3 results: measuring the survey transfer function with Balrog

Authors

S Everett,B Yanny,N Kuropatkin,EM Huff,Y Zhang,J Myles,A Masegian,J Elvin-Poole,S Allam,GM Bernstein,I Sevilla-Noarbe,M Splettstoesser,E Sheldon,M Jarvis,A Amon,I Harrison,A Choi,WG Hartley,A Alarcon,C Sánchez,D Gruen,K Eckert,J Prat,M Tabbutt,V Busti,MR Becker,N MacCrann,HT Diehl,DL Tucker,E Bertin,T Jeltema,A Drlica-Wagner,RA Gruendl,K Bechtol,A Carnero Rosell,TMC Abbott,M Aguena,J Annis,D Bacon,S Bhargava,D Brooks,DL Burke,M Carrasco Kind,J Carretero,FJ Castander,C Conselice,M Costanzi,LN Da Costa,MES Pereira,J De Vicente,J DeRose,S Desai,TF Eifler,AE Evrard,Ismael Ferrero,P Fosalba,J Frieman,J García-Bellido,E Gaztanaga,DW Gerdes,G Gutierrez,SR Hinton,DL Hollowood,K Honscheid,D Huterer,DJ James,S Kent,E Krause,K Kuehn,O Lahav,M Lima,H Lin,MAG Maia,JL Marshall,P Melchior,F Menanteau,R Miquel,JJ Mohr,R Morgan,J Muir,RLC Ogando,A Palmese,F Paz-Chinchón,AA Plazas,M Rodriguez-Monroy,AK Romer,A Roodman,E Sanchez,V Scarpine,S Serrano,M Smith,M Soares-Santos,E Suchyta,MEC Swanson,G Tarle,C To,MA Troxel,TN Varga,J Weller,RD Wilkinson,DES Collaboration

Journal

The Astrophysical Journal Supplement Series

Published Date

2022/1/12

We describe an updated calibration and diagnostic framework, Balrog, used to directly sample the selection and photometric biases of the Dark Energy Survey (DES) Year 3 (Y3) data set. We systematically inject onto the single-epoch images of a random 20% subset of the DES footprint an ensemble of nearly 30 million realistic galaxy models derived from DES Deep Field observations. These augmented images are analyzed in parallel with the original data to automatically inherit measurement systematics that are often too difficult to capture with generative models. The resulting object catalog is a Monte Carlo sampling of the DES transfer function and is used as a powerful diagnostic and calibration tool for a variety of DES Y3 science, particularly for the calibration of the photometric redshifts of distant" source" galaxies and magnification biases of nearer" lens" galaxies. The recovered Balrog injections are shown …

Explaining deep learning of galaxy morphology with saliency mapping

Authors

Prabh Bhambra,Benjamin Joachimi,Ofer Lahav

Journal

Monthly Notices of the Royal Astronomical Society

Published Date

2022/4

We successfully demonstrate the use of explainable artificial intelligence (XAI) techniques on astronomical data sets in the context of measuring galactic bar lengths. The method consists of training convolutional neural networks on human classified data from Galaxy Zoo in order to predict general galaxy morphologies, and then using SmoothGrad (a saliency mapping technique) to extract the bar for measurement by a bespoke algorithm. We contrast this to another method of using a convolutional neural network to directly predict galaxy bar lengths. These methods achieved correlation coefficients of 0.76 and 0.59, and root mean squared errors of 1.69 and 2.10 respective to human measurements. We conclude that XAI methods outperform conventional deep learning in this case, which could be reasonably explained by the larger data sets available when training the models. We suggest that our XAI method …

Deep learning methods for obtaining photometric redshift estimations from images

Authors

Ben Henghes,Jeyan Thiyagalingam,Connor Pettitt,Tony Hey,Ofer Lahav

Journal

Monthly Notices of the Royal Astronomical Society

Published Date

2022/5

Knowing the redshift of galaxies is one of the first requirements of many cosmological experiments, and as it is impossible to perform spectroscopy for every galaxy being observed, photometric redshift (photo-z) estimations are still of particular interest. Here, we investigate different deep learning methods for obtaining photo-z estimates directly from images, comparing these with ‘traditional’ machine learning algorithms which make use of magnitudes retrieved through photometry. As well as testing a convolutional neural network (CNN) and inception-module CNN, we introduce a novel mixed-input model that allows for both images and magnitude data to be used in the same model as a way of further improving the estimated redshifts. We also perform benchmarking as a way of demonstrating the performance and scalability of the different algorithms. The data used in the study comes entirely from the Sloan Digital Sky …

Euclid preparation-i. the euclid wide survey

Authors

R Scaramella,J Amiaux,Y Mellier,C Burigana,CS Carvalho,J-C Cuillandre,A Da Silva,A Derosa,J Dinis,E Maiorano,M Maris,I Tereno,R Laureijs,T Boenke,G Buenadicha,X Dupac,LM Gaspar Venancio,P Gómez-Álvarez,J Hoar,J Lorenzo Alvarez,GD Racca,G Saavedra-Criado,J Schwartz,R Vavrek,M Schirmer,H Aussel,R Azzollini,VF Cardone,M Cropper,A Ealet,B Garilli,W Gillard,BR Granett,L Guzzo,H Hoekstra,K Jahnke,T Kitching,T Maciaszek,M Meneghetti,L Miller,R Nakajima,SM Niemi,F Pasian,WJ Percival,S Pottinger,M Sauvage,M Scodeggio,S Wachter,A Zacchei,N Aghanim,A Amara,T Auphan,N Auricchio,S Awan,A Balestra,R Bender,C Bodendorf,D Bonino,E Branchini,S Brau-Nogue,Massimo Brescia,GP Candini,V Capobianco,C Carbone,RG Carlberg,J Carretero,R Casas,FJ Castander,M Castellano,Stefano Cavuoti,A Cimatti,R Cledassou,G Congedo,CJ Conselice,L Conversi,Y Copin,L Corcione,A Costille,F Courbin,H Degaudenzi,M Douspis,F Dubath,CAJ Duncan,S Dusini,S Farrens,S Ferriol,P Fosalba,N Fourmanoit,M Frailis,E Franceschi,P Franzetti,M Fumana,B Gillis,C Giocoli,A Grazian,F Grupp,Stein Vidar Hagfors Haugan,W Holmes,F Hormuth,P Hudelot,S Kermiche,A Kiessling,M Kilbinger,R Kohley,B Kubik,M Kümmel,M Kunz,Hannu Kurki-Suonio,O Lahav,S Ligori,Per Barth Lilje,I Lloro,O Mansutti,O Marggraf,K Markovic,F Marulli,Richard Massey,S Maurogordato,M Melchior,E Merlin,G Meylan,JJ Mohr,M Moresco,B Morin,L Moscardini,E Munari,RC Nichol,C Padilla,S Paltani,J Peacock,K Pedersen,V Pettorino,S Pires,M Poncet,L Popa,L Pozzetti,F Raison,R Rebolo,J Rhodes,H-W Rix,M Roncarelli,E Rossetti,R Saglia,P Schneider,T Schrabback,A Secroun,G Seidel,S Serrano,C Sirignano,G Sirri

Journal

Astronomy & Astrophysics

Published Date

2022/6/1

Euclid is a mission of the European Space Agency that is designed to constrain the properties of dark energy and gravity via weak gravitational lensing and galaxy clustering. It will carry out a wide area imaging and spectroscopy survey (the Euclid Wide Survey: EWS) in visible and near-infrared bands, covering approximately 15 000 deg2 of extragalactic sky in six years. The wide-field telescope and instruments are optimised for pristine point spread function and reduced stray light, producing very crisp images. This paper presents the building of the Euclid reference survey: the sequence of pointings of EWS, deep fields, and calibration fields, as well as spacecraft movements followed by Euclid as it operates in a step-and-stare mode from its orbit around the Lagrange point L2. Each EWS pointing has four dithered frames; we simulated the dither pattern at the pixel level to analyse the effective coverage. We used up …

Cosmology and neutrino mass with the minimum spanning tree

Authors

Krishna Naidoo,Elena Massara,Ofer Lahav

Journal

Monthly Notices of the Royal Astronomical Society

Published Date

2022/7

The information content of the minimum spanning tree (MST), used to capture higher order statistics and information from the cosmic web, is compared to that of the power spectrum for a νΛCDM model. The measurements are made in redshift space using haloes from the Quijote simulation of mass in a box of length . The power spectrum multipoles (monopole and quadrupole) are computed for Fourier modes in the range . For comparison the MST is measured with a minimum length-scale of . Combining the MST and power spectrum allows for many of the individual degeneracies to be broken; on its own the MST provides tighter constraints on the sum of neutrino masses Mν and cosmological parameters h, ns, and Ωb but the power spectrum alone provides tighter constraints on Ωm and σ8. Combined we find constraints that are a factor …

See List of Professors in Ofer Lahav University(University College London)

Ofer Lahav FAQs

What is Ofer Lahav's h-index at University College London?

The h-index of Ofer Lahav has been 95 since 2020 and 138 in total.

What are Ofer Lahav's top articles?

The articles with the titles of

Dark Energy Survey Year 3 results: redshift calibration of the MagLim lens sample from the combination of SOMPZ and clustering and its impact on cosmology

Cosmological constraints from the tomography of DES-Y3 galaxies with CMB lensing from ACT DR4

The Cosmological Parameters (2023)

Dark Energy Survey: Galaxy Sample for the Baryonic Acoustic Oscillation Measurement from the Final Dataset

The Dark Energy Survey: Cosmology Results With~ 1500 New High-redshift Type Ia Supernovae Using The Full 5-year Dataset

Dark Energy Survey Year 3 results: Simulation-based cosmological inference with wavelet harmonics, scattering transforms, and moments of weak lensing mass maps. Validation on …

Dark Energy Survey: A 2.1% measurement of the angular Baryonic Acoustic Oscillation scale at redshift =0.85 from the final dataset

SPT Clusters with DES and HST Weak Lensing. II. Cosmological Constraints from the Abundance of Massive Halos

...

are the top articles of Ofer Lahav at University College London.

What are Ofer Lahav's research interests?

The research interests of Ofer Lahav are: Cosmology, Astrophysics

What is Ofer Lahav's total number of citations?

Ofer Lahav has 174,336 citations in total.

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