Development of the Red Sequence in Galaxy Clusters
Noelia Jim\'enez, Sof\'ia A. Cora, Anal\'ia Smith Castelli, and Lilia, P. Bassino
TL;DR
This paper explores how the color-magnitude relation in galaxy clusters develops, highlighting the role of minor mergers in shaping the properties of bright galaxies through a combination of simulations and galaxy formation models.
Contribution
It introduces a combined simulation and semi-analytic approach to study the origin of the galaxy color-magnitude relation, emphasizing the impact of minor mergers.
Findings
Minor mergers influence the bright end of the CMR.
The color-magnitude relation's shape is affected by galaxy interactions.
Simulation results align with observed galaxy properties.
Abstract
We investigate the origin of the color-magnitude relation (CMR) observed in cluster galaxies by using a combination of a cosmological N-body simulation of a cluster of galaxies and a semi-analytic model of galaxy formation. The departure of galaxies in the bright end of the CMR with respect to the trend defined by less luminous galaxies could be explained by the influence of minor mergers.
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