AMICO galaxy clusters in KiDS-DR3: Evolution of the luminosity function between z=0.1 and z=0.8

• Published in: arXiv.org
• Main Authors: Puddu, E, Radovich, M, Sereno, M, Bardelli, S, Maturi, M, Moscardini, L, Bellagamba, F, Giocoli, C, Marulli, F, Roncarelli, M
• Format: Paper Journal Article
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 10.11.2020
• Subjects: Galactic clusters; Galactic evolution; Galaxies; Luminosity; Parameters; Physics - Cosmology and Nongalactic Astrophysics; Populations; Red shift; Star formation; Stars & galaxies; Stellar evolution
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.2011.05131

By means of the \(r\)-band luminosity function (LF) of galaxies in a sample of about 4000 clusters detected by the cluster finder AMICO in the KiDS-DR3 area of about 400 deg\(^2\), we studied the evolution with richness and redshift of the passive evolving (red), star-forming (blue), and total galaxy populations. This analysis was performed for clusters in the redshift range [0.1,0.8] and in the mass range [\(10^{13} M_{\odot}\),\(10^{15} M_{\odot}\)]. To compute LFs, we binned the luminosity distribution in magnitude and statistically subtracted the background. Then, we divided the cluster sample in bins of both redshift and richness/mass. We stacked LF counts in each 2D bin for the total, red, and blue galaxy populations; finally, we fitted the stacked LF with a Schechter function and studied the trend of its parameters with redshift and richness/mass. We found a passive evolution with \(z\) for the bright part of the LF for the red and total populations and no significant trends for the faint galaxies. The mass/richness dependence is clear for the density parameter \(\Phi_{\star}\), increasing with richness, and for the total population faint end, which is shallower in the rich clusters.