期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 513, 期 4, 页码 5517-5539出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stac1160
关键词
surveys; galaxies: distances and redshifts; large-scale structure of Universe; cosmology: observations
资金
- US Department of Energy, Office of Science, Office of High Energy Physics
- US Department of Energy
- US National Science Foundation
- Ministry of Science and Education of Spain
- Science and Technology Facilities Council of the United Kingdom
- Higher Education Funding Council for England
- National Center for Supercomputing Applications at the University of Illinois at Urbana-Champaign
- Center for Cosmology and Astro-Particle Physics at the Ohio State University
- Mitchell Institute for Fundamental Physics and Astronomy at Texas AM University
- Financiadora de Estudos e Projetos
- Fundacao Carlos Chagas Filho de Amparo `a Pesquisa do Estado do Rio de Janeiro, Conselho Nacional de Desenvolvimento Cientifico e Tecnol 'ogico
- Deutsche Forschungsgemeinschaft
- Collaborating Institutions in the Dark Energy Survey
- University of California at Santa Cruz
- University of Cambridge, Centro de Investigaciones Energeticas, Medioambientales y Tecnologicas-Madrid
- DES-Brazil Consortium
- University of Edinburgh
- Eidgenossische Technische Hochschule (ETH) Zurich
- Ludwig-Maximilians Universitat M unchen
- University of Portsmouth
- OzDES Membership Consortium [2012B-0001]
- National Science Foundation [AST-1138766, AST-1536171]
- MINECO [AYA201571825, ESP2015-66861, FPA2015-68048, SEV-2016-0588, SEV2016-0597, MDM-2015-0509]
- ERDF
- European Union - CERCA program of the Generalitat de Catalunya
- European Research Council under the European Union
- ERC [240672, 291329, 306478]
- Brazilian Instituto Nacional de Ciencia e Tecnologia (INCT) e-Universe (CNPq) [465376/2014-2, DE-AC02-07CH11359]
- Alfred P. Sloan Foundation
- US Department of Energy Office of Science
- Center for High-Performance Computing at the University of Utah
- Carnegie Institution for Science, Carnegie Mellon University, Center for Astrophysics | Harvard & Smithsonian (CfA)
- Chilean Participation Group
- French Participation Group
- Kavli Institute for the Physics and Mathematics of the Universe (IPMU)/University of Tokyo
- Korean Participation Group
- Lawrence Berkeley National Laboratory
- Max-Planck-Institut fur Astrophysik (MPA Garching)
- Max-Planck-Institut fur Extraterrestrische Physik (MPE)
- New Mexico State University, New York University
- Shanghai Astronomical Observatory, United Kingdom Participation Group
- Yale University
- European Research Council (ERC) [240672, 306478, 291329] Funding Source: European Research Council (ERC)
This study presents clustering redshift measurements for the Dark Energy Survey (DES) lens sample galaxies used in weak gravitational lensing and galaxy clustering studies. The methodology is validated in simulations and applied to estimate the redshift distribution for different photometrically selected bins. The results have important implications for calibrating the photometric redshift distributions used in companion papers for DES Year 3 results.
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 |Delta z| = 0.01 in most of the bins. We also test a method to calibrate a width parameter for redshift distributions, which we found necessary to use for some of our samples. Our typical uncertainties on the mean redshift ranged from 0.003 to 0.008, while our uncertainties on the width ranged from 4 to 9 per cent. We discuss how these results calibrate the photometric redshift distributions used in companion papers for DES Year 3 results.
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