The WaZP galaxy cluster sample of the dark energy survey year 1

Aguena, M.; Benoist, C.; da Costa, L. N.; Ogando, R. L. C.; Gschwend, J.; Sampaio-Santos, H. B.; Lima, M.; Maia, M. A. G.; Allam, S.; Avila, S.; Bacon, D.; Bertin, E.; Bhargava, S.; Brooks, D.; Carnero Rosell, A.; Carrasco Kind, M.; Carretero, J.; Costanzi, M.; De Vicente, J.; Desai, S.; Diehl, H. T.; Doel, P.; Everett, S.; Evrard, A. E.; Ferrero, I.; Ferté, A.; Flaugher, B.; Fosalba, P.; Frieman, J.; García-Bellido, J.; Giles, P.; Gruendl, R. A.; Gutierrez, G.; Hinton, S. R.; Hollowood, D. L.; Honscheid, K.; James, D. J.; Jeltema, T.; Kuehn, K.; Kuropatkin, N.; Lahav, O.; Melchior, P.; Miquel, R.; Morgan, R.; Palmese, A.; Paz-Chinchón, F.; Plazas, A. A.; Romer, A. K.; Sanchez, E.; Santiago, B.; Schubnell, M.; Serrano, S.; Sevilla-Noarbe, I.; Smith, M.; Soares-Santos, M.; Suchyta, E.; Tarle, G.; To, C.; Tucker, D. L.; Wilkinson, R. D.
Bibliographical reference

Monthly Notices of the Royal Astronomical Society

Advertised on:
4
2021
Number of authors
60
IAC number of authors
1
Citations
27
Refereed citations
23
Description
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.
Related projects
Galaxy proto-cluster
Molecular Gas and Dust in Galaxies Across Cosmic Time
Two of the most fundamental questions in astrophysics are the conversion of molecular gas into stars and how this physical process is a function of environments on all scales, ranging from planetary systems, stellar clusters, galaxies to galaxy clusters. The main goal of this internal project is to get insight into the formation and evolution of
Helmut
Dannerbauer