Paper

The PSZ-MCMF catalogue of Planck clusters over the DES region

da Costa, L N, Gruendl, R A, A Carnero Rosell, J -B Melin, Frieman, J, Palmese, A, García-Bellido, J, Miquel, R, Romer, A K, Pratt, G W, Melchior, P, Tarrío, P, Pereira, M E S, Andrade-Oliveira, F, Diehl, H T, Tarle, G, Arnaud, M, Weaverdyck, N, Gruen, D, Kuehn, K, Bacon, D, Burke, D L, M Carrasco Kind, Bertin, E, Menanteau, F, Hinton, S R, Mena-Fernández, J, Suchyta, E, Alves, O, Honscheid, K, Grandis, S, Carretero, J, Gschwend, J, Paz-Chinchón, F, James, D J, Scarpine, V, Brooks, D, Doel, P, Hollowood, D L, Smith, M, Flaugher, B, Costanzi, M, Thomas, D, Rodriguez-Monroy, M, Ferrero, I, Lahav, O, Raveri, M, Plazas Malagón, A A, Desai, S, Gutierrez, G, Kuropatkin, N, Mohr, J J, Abbott, T M C, Aguena, M, Sevilla-Noarbe, I, Hernández-Lang, D, Lidman, C, Pieres, A, Klein, M, Castander, F J, Everett, S

2023

Overview

We present the first systematic follow-up of Planck Sunyaev-Zeldovich effect (SZE) selected candidates down to signal-to-noise (S/N) of 3 over the 5000 deg\\(^2\\) covered by the Dark Energy Survey. Using the MCMF cluster confirmation algorithm, we identify optical counterparts, determine photometric redshifts and richnesses and assign a parameter, \\(f_{\\rm cont}\\), that reflects the probability that each SZE-optical pairing represents a random superposition of physically unassociated systems rather than a real cluster. The new PSZ-MCMF cluster catalogue consists of 853 MCMF confirmed clusters and has a purity of 90%. We present the properties of subsamples of the PSZ-MCMF catalogue that have purities ranging from 90% to 97.5%, depending on the adopted \\(f_{\\rm cont}\\) threshold. Halo mass estimates \\(M_{500}\\), redshifts, richnesses, and optical centers are presented for all PSZ-MCMF clusters. The PSZ-MCMF catalogue adds 589 previously unknown Planck identified clusters over the DES footprint and provides redshifts for an additional 50 previously published Planck selected clusters with S/N>4.5. Using the subsample with spectroscopic redshifts, we demonstrate excellent cluster photo-\\(z\\) performance with an RMS scatter in \\(\\Delta z/(1+z)\\) of 0.47%. Our MCMF based analysis allows us to infer the contamination fraction of the initial S/N>3 Planck selected candidate list, which is ~50%. We present a method of estimating the completeness of the PSZ-MCMF cluster sample. In comparison to the previously published Planck cluster catalogues. this new S/N>3 MCMF confirmed cluster catalogue populates the lower mass regime at all redshifts and includes clusters up to z\\(\\sim\\)1.3.

• Publisher: Cornell University Library, arXiv.org
• Subject: Algorithms / Clusters / Dark energy / Optical counterparts (astronomy) / Red shift / Sky surveys (astronomy) / Sunyaev-Zeldovich effect