Dark Energy Survey Year 1 Results: redshift distributions of the weak-lensing source galaxies

B. Hoyle; D. Gruen; G. M. Bernstein; M. M. Rau; J. De Vicente; G. Hartley; E. Gaztanaga; J. DeRose; M. A. Troxel; C. Davis; A. Alarcon; N. MacCrann; J. Prat; C. Sanchez; E. Sheldon; R. H. Wechsler; J. Asorey; M. R. Becker; C. Bonnett; A. Carnero Rosell; D. Carollo; M. Carrasco Kind; F. J. Castander; R. Cawthon; C. Chang; M. Childress; T. M. Davis; A. Drlica-Wagner; M. Gatti; K. Glazebrook; J. Gschwend; S. R. Hinton; J. K. Hoormann; A. G. Kim; A. King; K. Kuehn; G. Lewis; C. Lidman; H. Lin; E. Macaulay; M. A. G. Maia; P. Martini; D. Mudd; A. Moller; R. C. Nichol; R. L. C. Ogando; R. P. Rollins; A. Roodman; A. J. Ross; E. Rozo; E. S. Rykoff; S. Samuroff; I. Sevilla-Noarbe; R. Sharp; N. E. Sommer; B. E. Tucker; S. A. Uddin; T. N. Varga; P. Vielzeuf; F. Yuan; B. Zhang; T. M. C. Abbott; F. B. Abdalla; S. Allam; J. Annis; K. Bechtol; A. Benoit-Levy; E. Bertin; D. Brooks; E. Buckley-Geer; L. Burke; M. T. Busha; D. Capozzi; J. Carretero; M. Crocce; C. B. D'Andrea; L. N. da Costa; D. L. Depoy; S. Desai; H. T. Diehl; P. Doel; T. F. Eifler; J. Estrada; A. E. Evrard; E. Fernandez; B. Flaugher; P. Fosalba; J. Frieman; J. Garcia-Bellido; D. W. Gerdes; T. Giannantonio; D. A. Goldstein; R. A. Gruendl; G. Gutierrez; K. Honscheid; D. J. James; M. Jarvis; T. Jeltema; M. W. G. Johnson; M. D. Johnson; D. Kirk; E. Krause; S. Kuhlmann; N. Kuropatkin; O. Lahav; T. S. Li; M. Lima; M. March; L. Marshall; P. Melchior; F. Menanteau; R. Miquel; B. Nord; C. R. O'Neill; A. A. Plazas; A. K. Romer; M. Sako; E. Sanchez; B. Santiago; V. Scarpine; R. Schindler; M. Schubnell; M. Smith; R. C. Smith; M. Soares-Santos; F. Sobreira; E. Suchyta; M. E. C. Swanson; G. Tarle; D. Thomas; D. L. Tucker; V. Vikram; A. R. Walker; J. Weller; W. Wester; R. C. Wolf; B. Yanny; J. Zuntz

doi:10.1093/mnras/sty957

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Dark Energy Survey Year 1 Results: redshift distributions of the weak-lensing source galaxies

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Dark Energy Survey Year 1 Results: redshift distributions of the weak-lensing source galaxies

B. Hoyle, D. Gruen, G. M. Bernstein, M. M. Rau, J. De Vicente, G. Hartley, E. Gaztanaga, J. DeRose, M. A. Troxel, C. Davis, …

Monthly notices of the Royal Astronomical Society, Vol.478(1), pp.592-610

01/01/2018

DOI: https://doi.org/10.1093/mnras/sty957

Abstract

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We describe the derivation and validation of redshift distribution estimates and their uncertainties for the populations of galaxies used as weak-lensing sources in the Dark Energy Survey (DES) Year 1 cosmological analyses. The Bayesian Photometric Redshift (BPZ) code is used to assign galaxies to four redshift bins between z approximate to 0.2 and approximate to 1.3, and to produce initial estimates of the lensing-weighted redshift distributions n(PZ)(i)(z) proportional to d(n)(i)/dz for members of bin i. Accurate determination of cosmological parameters depends critically on knowledge of n(i), but is insensitive to bin assignments or redshift errors for individual galaxies. The cosmological analyses allow for shifts n(i)(z) = n(PZ)(i)(z - Delta z(i)) to correct the mean redshift of n(i)(z) for biases in n(PZ)(i). The Delta z(i) are constrained by comparison of independently estimated 30-band photometric redshifts of galaxies in the Cosmic Evolution Survey (COSMOS) field to BPZ estimates made from the DES griz fluxes, for a sample matched in fluxes, pre-seeing size, and lensing weight to the DES weak-lensing sources. In companion papers, the Delta z(i) of the three lowest redshift bins are further constrained by the angular clustering of the source galaxies around red galaxies with secure photometric redshifts at 0.15 < z < 0.9. This paper details the BPZ and COSMOS procedures, and demonstrates that the cosmological inference is insensitive to details of the n(i)(z) beyond the choice of Delta z(i). The clustering and COSMOS validation methods produce consistent estimates of Delta z(i) in the bins where both can be applied, with combined uncertainties of sigma(i)(Delta z) = 0.015, 0.013, 0.011, and 0.022 in the four bins. Repeating the photo-z procedure instead using the Directional Neighbourhood Fitting algorithm, or using the n(i)(z) estimated from the matched sample in COSMOS, yields no discernible difference in cosmological inferences.

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Title: Dark Energy Survey Year 1 Results: redshift distributions of the weak-lensing source galaxies
Creators: B. Hoyle - Max Planck Institute for Extraterrestrial Physics
D. Gruen - Kavli Institute for Particle Astrophysics and Cosmology
G. M. Bernstein - Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA
M. M. Rau - Ludwig-Maximilians-Universität München
J. De Vicente - CIEMAT, Madrid, Spain
G. Hartley - UCL, Dept Phys & Astron, Gower St, London WC1E 6BT, England
E. Gaztanaga - Institute of Space Sciences
J. DeRose - Kavli Institute for Particle Astrophysics and Cosmology
M. A. Troxel - The Ohio State University
C. Davis - Stanford University
A. Alarcon - Institute of Space Sciences
N. MacCrann - The Ohio State University
J. Prat - Institute for High Energy Physics
C. Sanchez - Institute for High Energy Physics
E. Sheldon - Brookhaven National Laboratory
R. H. Wechsler - Stanford University
J. Asorey - ARC Centre of Excellence for All-sky Astrophysics
M. R. Becker - Stanford University
C. Bonnett - Institute for High Energy Physics
A. Carnero Rosell - Laboratório Interinstitucional de e-Astronomia
D. Carollo - ARC Centre of Excellence for All-sky Astrophysics
M. Carrasco Kind - University of Illinois Urbana-Champaign
F. J. Castander - S&N
R. Cawthon - University of Chicago
C. Chang - University of Chicago
M. Childress - University of Southampton
T. M. Davis - Sky
A. Drlica-Wagner - Fermi National Accelerator Laboratory
M. Gatti - Institute for High Energy Physics
K. Glazebrook - Swinburne University of Technology
J. Gschwend - Laboratório Interinstitucional de e-Astronomia
S. R. Hinton - University of Queensland
J. K. Hoormann - University of Queensland
A. G. Kim - Cyclotron
A. King - University of Queensland
K. Kuehn - Australian Astronomical Observatory
G. Lewis - ARC Centre of Excellence for All-sky Astrophysics
C. Lidman - ARC Centre of Excellence for All-sky Astrophysics
H. Lin - Fermi National Accelerator Laboratory
E. Macaulay - University of Queensland
M. A. G. Maia - Laboratório Interinstitucional de e-Astronomia
P. Martini - The Ohio State University
D. Mudd - The Ohio State University
A. Moller - ARC Centre of Excellence for All-sky Astrophysics
R. C. Nichol - University of Portsmouth
R. L. C. Ogando - Laboratório Interinstitucional de e-Astronomia
R. P. Rollins - University of Manchester
A. Roodman - Stanford University
A. J. Ross - The Ohio State University
E. Rozo - University of Arizona
E. S. Rykoff - Stanford University
S. Samuroff - University of Manchester
I. Sevilla-Noarbe - Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas
R. Sharp - Australian National University
N. E. Sommer - ARC Centre of Excellence for All-sky Astrophysics
B. E. Tucker - ARC Centre of Excellence for All-sky Astrophysics
S. A. Uddin - ARC Centre of Excellence for All-sky Astrophysics
T. N. Varga - Ludwig-Maximilians-Universität München
P. Vielzeuf - Institute for High Energy Physics
F. Yuan - ARC Centre of Excellence for All-sky Astrophysics
B. Zhang - ARC Centre of Excellence for All-sky Astrophysics
T. M. C. Abbott - Natl Opt Astron Observ, Cerro Tololo Interamer Observ, Casilla 603, La Serena, Chile
F. B. Abdalla - UCL, Dept Phys & Astron, Gower St, London WC1E 6BT, England
S. Allam - Fermi National Accelerator Laboratory
J. Annis - Fermi National Accelerator Laboratory
K. Bechtol - Large Synoptic Survey Telescope Corporation
A. Benoit-Levy - University College London
E. Bertin - Institut d'Astrophysique de Paris
D. Brooks - University College London
E. Buckley-Geer - Fermi National Accelerator Laboratory
L. Burke - Stanford University
M. T. Busha - Stanford University
D. Capozzi - University of Portsmouth
J. Carretero - Institute for High Energy Physics
M. Crocce - Institute of Space Sciences
C. B. D'Andrea - Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA
L. N. da Costa - Laboratório Interinstitucional de e-Astronomia
D. L. Depoy - Texas A&M Univ, George P & Cynthia Woods Mitchell Inst Fundamenta, College Stn, TX 77843 USA
S. Desai - Indian Institute of Technology Hyderabad
H. T. Diehl - Fermi National Accelerator Laboratory
P. Doel - University College London
T. F. Eifler - California Institute of Technology
J. Estrada - Fermi National Accelerator Laboratory
A. E. Evrard - University of Michigan–Ann Arbor
E. Fernandez - Institute for High Energy Physics
B. Flaugher - Fermi National Accelerator Laboratory
P. Fosalba - Institute of Space Sciences
J. Frieman - Fermi National Accelerator Laboratory
J. Garcia-Bellido - Autonomous University of Madrid
D. W. Gerdes - Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA
T. Giannantonio - University of Cambridge
D. A. Goldstein - Lawrence Berkeley National Laboratory
R. A. Gruendl - University of Illinois Urbana-Champaign
G. Gutierrez - Fermi National Accelerator Laboratory
K. Honscheid - The Ohio State University
D. J. James - University of Washington
M. Jarvis - University of Pennsylvania
T. Jeltema - Santa Cruz Institute for Particle Physics, Santa Cruz, CA 95064, USA
M. W. G. Johnson - National Center for Supercomputing Applications
M. D. Johnson - National Center for Supercomputing Applications
D. Kirk - UCL, Dept Phys & Astron, Gower St, London WC1E 6BT, England
E. Krause - Stanford University
S. Kuhlmann - Argonne Natl Lab, 9700 South Cass Ave, Lemont, IL 60439 USA
N. Kuropatkin - Fermi National Accelerator Laboratory
O. Lahav - UCL, Dept Phys & Astron, Gower St, London WC1E 6BT, England
T. S. Li - Fermi National Accelerator Laboratory
M. Lima - Lab Interinst E Astron LIneA, Rua Gal Jose Cristino 77, BR-20921400 Rio De Janeiro, RJ, Brazil
M. March - Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA
L. Marshall - Texas A&M Univ, George P & Cynthia Woods Mitchell Inst Fundamenta, College Stn, TX 77843 USA
P. Melchior - Princeton University
F. Menanteau - University of Illinois Urbana-Champaign
R. Miquel - Universidade Aberta
B. Nord - Fermi National Accelerator Laboratory
C. R. O'Neill - Sky
A. A. Plazas - California Institute of Technology
A. K. Romer - University of Sussex
M. Sako - Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA
E. Sanchez - CIEMAT, Madrid, Spain
B. Santiago - Lab Interinst E Astron LIneA, Rua Gal Jose Cristino 77, BR-20921400 Rio De Janeiro, RJ, Brazil
V. Scarpine - Fermi National Accelerator Laboratory
R. Schindler - Menlo School
M. Schubnell - Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA
M. Smith - University of Southampton
R. C. Smith - Natl Opt Astron Observ, Cerro Tololo Interamer Observ, Casilla 603, La Serena, Chile
M. Soares-Santos - Fermi National Accelerator Laboratory
F. Sobreira - Laboratório Interinstitucional de e-Astronomia
E. Suchyta - Oak Ridge Natl Lab, Comp Sci & Math Div, Oak Ridge, TN 37831 USA
M. E. C. Swanson - Clark Art Institute
G. Tarle - Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA
D. Thomas - University of Portsmouth
D. L. Tucker - Fermi National Accelerator Laboratory
V. Vikram - Argonne Natl Lab, 9700 South Cass Ave, Lemont, IL 60439 USA
A. R. Walker - Natl Opt Astron Observ, Cerro Tololo Interamer Observ, Casilla 603, La Serena, Chile
J. Weller - Ludwig Maximilians Univ Munchen, Fak Phys, Univ Sternwarte, Scheinerstr 1, D-81679 Munich, Germany
W. Wester - Fermi National Accelerator Laboratory
R. C. Wolf - Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA
B. Yanny - Fermi National Accelerator Laboratory
J. Zuntz - University of Edinburgh
Publication Details: Monthly notices of the Royal Astronomical Society, Vol.478(1), pp.592-610
Publisher: Oxford Univ Press
Number of pages: 19
Date published: 01/01/2018
Grant note: CERCA programme of the Generalitat de Catalunya University of Edinburgh University of Chicago U.S. Department of Energy; United States Department of Energy (DOE) Kavli Institute of Cosmological Physics at the University of Chicago Lawrence Berkeley National Laboratory; United States Department of Energy (DOE) Ministerio da Ciencia, Tecnologia e Inovacao; Spanish Government Ministry of Science and Education of Spain; Spanish Government Institut de Ciencies de l'Espai (IEEC/CSIC) European Research Council under the European Union's Seventh Framework Programme (FP7/2007-2013) Ohio State University University College London; General Electric University of Pennsylvania Centro de Investigaciones Energeticas, Medioambientales y Tecnologicas-Madrid U.S. National Science Foundation; National Science Foundation (NSF) AST-1138766; AST-1536171 / National Science Foundation; National Science Foundation (NSF) Stanford University AYA2015-71825; ESP2015-88861; FPA2015-68048; SEV-2012-0234; SEV-2016-0597; MDM-2015-0509 / MINECO; Spanish Government CE110001020 / Australian Research Council Centre of Excellence for All-sky Astrophysics; Australian Research Council 1125897 / Direct For Mathematical & Physical Scien; Division Of Physics; National Science Foundation (NSF); NSF - Directorate for Mathematical & Physical Sciences (MPS) University of Portsmouth Fermi National Accelerator Laboratory; United States Department of Energy (DOE); University of Chicago OzDES Membership Consortium Center for Cosmology and Astro-Particle Physics at the Ohio State University; Ohio State University Texas AM University University of Michigan; University of Michigan System Eidgenossische Technische Hochschule Zurich University of Nottingham DE-AC02-07CH11359 / U.S. Department of Energy, Office of Science, Office of High Energy Physics; United States Department of Energy (DOE) DES-Brazil Consortium National Center for Supercomputing Applications at the University of Illinois at Urbana-Champaign Mitchell Institute for Fundamental Physics and Astronomy at Texas AM University Conselho Nacional de Desenvolvimento Cientifico e Tecnologico; Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPQ) University of Cambridge Institut de Fisica d'Altes Energies NAS8-03060 / NASA; National Aeronautics & Space Administration (NASA) 240672; 291329; 306478 / ERC; European Research Council (ERC); European Commission University of California at Santa Cruz Ludwig-Maximilians Universitat Munchen Deutsche Forschungsgemeinschaft; German Research Foundation (DFG) SLAC National Accelerator Laboratory; Stanford University; United States Department of Energy (DOE) ST/M007030/1; ST/I001204/1; ST/L005573/1; ST/J005428/1; ST/P000649/1; ST/R000972/1; ST/M002853/1; ST/K00090X/1; ST/F002335/1; ST/K006797/1 / STFC; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC) Fundacao Carlos Chagas Filho de Amparo a Pesquisa do Estado do Rio de Janeiro; Fundacao Carlos Chagas Filho de Amparo a Pesquisa do Estado do Rio De Janeiro (FAPERJ) PF5-160138 / NASA through Einstein Postdoctoral Fellowship by the Chandra X-ray Center Financiadora de Estudos e Projetos; Financiadora de Inovacao e Pesquisa (Finep) associated Excellence Cluster Universe Argonne National Laboratory; United States Department of Energy (DOE) Higher Education Funding Council for England; UK Research & Innovation (UKRI); Higher Education Funding Council for England (HEFCE) University of Illinois at Urbana-Champaign LP175.A-0839 / Very Large Telescope at the ESO Paranal Observatory ERDF funds from the European Union Science and Technology Facilities Council of the United Kingdom; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC) National Optical Astronomy Observatory,; National Science Foundation (NSF); NSF - Directorate for Mathematical & Physical Sciences (MPS) University of Sussex
Identifiers: 99783856502346
Academic Unit: FEPS Central Faculty Admin
Language: English
Resource Type: Journal article

Dark Energy Survey Year 1 Results: redshift distributions of the weak-lensing source galaxies

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