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The WaZP galaxy cluster sample of the dark energy survey year 1
- Source :
- Mon.Not.Roy.Astron.Soc., Mon.Not.Roy.Astron.Soc., 2021, 502 (3), pp.4435-4456. ⟨10.1093/mnras/stab264⟩, Digital.CSIC. Repositorio Institucional del CSIC, instname
- Publication Year :
- 2021
- Publisher :
- HAL CCSD, 2021.
-
Abstract
- Aguena, M., et al.<br />We present a new (2+1)D galaxy cluster finder based on photometric redshifts called Wavelet Z Photometric (WaZP) applied to DES first year (Y1A1) data. The results are compared to clusters detected by the South Pole Telescope (SPT) survey and the redMaPPer cluster finder, the latter based on the same photometric data. WaZP searches for clusters in wavelet-based density maps of galaxies selected in photometric redshift space without any assumption on the cluster galaxy populations. The comparison to other cluster samples was performed with a matching algorithm based on angular proximity and redshift difference of the clusters. It led to the development of a new approach to match two optical cluster samples, following an iterative approach to minimize incorrect associations. The WaZP cluster finder applied to DES Y1A1 galaxy survey (1511.13 deg2 up to mi = 23 mag) led to the detection of 60 547 galaxy clusters with redshifts 0.05 < z < 0.9 and richness Ngals ≥ 5. Considering the overlapping regions and redshift ranges between the DES Y1A1 and SPT cluster surveys, all sz based SPT clusters are recovered by the WaZP sample. The comparison between WaZP and redMaPPer cluster samples showed an excellent overall agreement for clusters with richness Ngals (λ for redMaPPer) greater than 25 (20), with 95 per cent recovery on both directions. Based on the cluster cross-match, we explore the relative fragmentation of the two cluster samples and investigate the possible signatures of unmatched clusters.<br />The DES data management system is supported by the National Science Foundation under Grant Numbers AST-1138766 and AST-1536171. The DES participants from Spanish institutions are partially supported by MICINN under grants ESP2017-89838, PGC2018-094773, PGC2018-102021, SEV-2016-0588, SEV-2016-0597, and MDM-2015-0509, some of which include ERDF funds from the European Union. IFAE is partially funded by the CERCA program of the Generalitat de Catalunya. Research leading to these results has received funding from the European Research Council under the European Union’s Seventh Framework Program (FP7/2007-2013) including ERC grant agreements 240672, 291329, and 306478. We acknowledge support from the Brazilian Instituto Nacional de Ciência e Tecnologia (INCT) do e-Universo (CNPq grant 465376/2014-2).
- Subjects :
- Cosmology and Nongalactic Astrophysics (astro-ph.CO)
FOS: Physical sciences
Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
Surveys
Lambda
01 natural sciences
surveys
0103 physical sciences
distances and redshifts [Galaxies]
Cluster (physics)
clusters: general [galaxies]
survey
distances and redshift [galaxies]
data analysis [Methods]
010303 astronomy & astrophysics
Galaxy cluster
Photometric redshift
Physics
010308 nuclear & particles physics
Astrophysics::Instrumentation and Methods for Astrophysics
Astronomy and Astrophysics
methods: data analysis
Galaxy
Redshift
South Pole Telescope
Space and Planetary Science
galaxies: clusters: general
data analysi [methods]
Cluster sampling
galaxies: distances and redshifts
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Astrophysics - Cosmology and Nongalactic Astrophysics
Subjects
Details
- Language :
- English
- ISSN :
- 00358711
- Database :
- OpenAIRE
- Journal :
- Mon.Not.Roy.Astron.Soc., Mon.Not.Roy.Astron.Soc., 2021, 502 (3), pp.4435-4456. ⟨10.1093/mnras/stab264⟩, Digital.CSIC. Repositorio Institucional del CSIC, instname
- Accession number :
- edsair.doi.dedup.....2bf100add5832cf598f9ac7736f86453