We investigate the origin of the colour-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
denoted by less luminous galaxies could be explained by the influence of minor
mergersComment: ASP Conference, Galaxies in Isolation; Exploring Nature vs. Nurture;
201