Dark energy survey year 3 results: Galaxy sample for BAO measurement
Entity
UAM. Departamento de Física TeóricaPublisher
Royal Astronomical Society; Oxford University PressDate
2021-10-27Citation
10.1093/mnras/stab2995
Monthly Notices of the Royal Astronomical Society 509.1 (2022): 778-799
ISSN
0035-8711 (print); 1365-2966 (online)DOI
10.1093/mnras/stab2995Project
Gobierno de España. ESP2017-89838-C3-1-R; Gobierno de España. PGC2018-094773-B-C33; Gobierno de España. PGC2018-102021-B-I00; Gobierno de España. SEV-2016-0588; Gobierno de España. SEV-2016-0597; info:eu-repo/grantAgreement/EC/FP7/240672/EU//COGS; info:eu-repo/grantAgreement/EC/FP7/291329/EU//TESTDE; info:eu-repo/grantAgreement/EC/FP7/306478/EU//COSMICDAWN; Gobierno de España. AYA2017-84061-P; Gobierno de España. ESP2017-84272-C2-1-R; info:eu-repo/grantAgreement/EC/FP7/713366/EU//InterTalentumEditor's Version
https://doi.org/10.1093/mnras/stab2995Subjects
Catalogues; Surveys; Cosmology: Observations; Cosmology: Large-Scale Structure of Universe; FísicaNote
Artículo escrito por un elevado número de autores, solo se referencian el que aparece en primer lugar, los autores pertenecientes a la UAM y el nombre del grupo de colaboración, si lo hubiereThis is a pre-copyedited, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The version of record Monthly Notices of the Royal Astronomical Society 509.1 (2022): 778-799 is available online at: https://academic.oup.com/mnras/article-abstract/509/1/778/6412531?redirectedFrom=fulltext
Rights
© 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical SocietyAbstract
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) Y3 data. The definition is based on a colour and redshift-dependent magnitude cut optimized to select galaxies at redshifts higher than 0.5, while ensuring a high-quality determination. The sample covers ~4100 deg2 to a depth of i = 22.3 (AB) at 10s. It contains 7031 993 galaxies in the redshift range from z = 0.6 to 1.1, with a mean effective redshift of 0.835. Redshifts are estimated with the machine learning algorithm DNF, and are validated using the VIPERS PDR2 sample. We find a mean redshift bias of zbias~0.01 and a mean uncertainty, in units of 1 + z, of σ68~0.03. We evaluate the galaxy population of the sample, showing it is mostly built upon Elliptical to Sbc types. Furthermore, we find a low level of stellar contamination of ≤ 4 per cent. We present the method used to mitigate the effect of spurious clustering coming from observing conditions and other large-scale systematics.We apply it to the BAO sample and calculate weights that are used to get a robust estimate of the galaxy clustering signal. This paper is one of a series dedicated to the analysis of the BAO signal in DES Y3. In the companion papers, we present the galaxy mock catalogues used to calibrate the analysis and the angular diameter distance constraints obtained through the fitting to the BAO scale
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Google Scholar:Rosell, A. Carnero
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Avila, S.
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García-Bellido Capdevila, Juan
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DES Collaboration
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