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arXiv · 2011.05131

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

E. Puddu·M. Radovich·M. Sereno·S. Bardelli·M. Maturi·L. Moscardini·F. Bellagamba·C. Giocoli·F. Marulli·M. Roncarelli
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Abstract

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.

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E. Puddu, M. Radovich, M. Sereno, S. Bardelli, M. Maturi, L. Moscardini, F. Bellagamba, C. Giocoli, F. Marulli, M. Roncarelli. 2020-11-10. AMICO galaxy clusters in KiDS-DR3: Evolution of the luminosity function between z=0.1 and z=0.8. https://doi.org/10.1051/0004-6361/202039259

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