Development of the Red Sequence in Galaxy Clusters

JIMÉNEZ, NOELIA; CORA, SOFIA; SMITH CASTELLI, ANALÍA; BASSINO, LILIA

Río de Janeiro, Brasil

Simposio; XXVII Asamblea General de la IAU, Simposio No. 267: “Evolution of Galaxies and Central Black Holes: Feeding and Feedback”; 2009

Union Astronomica Internacional (IAU)

    ABSTRACT We investigate the origin of the colour-magnitude relation (CMR) observed in cluster galaxies by using a combination of cosmological N-body simulations of cluster of galaxies and a semi-analytic model of galaxy formation (Lagos, Cora & Padilla 2008). Simulated results are compared with the photometric properties of early-type galaxies in the Antlia cluster (Smith Castelli et al. 2008). The good agreement obtained between observations and simulations allows us to use the information provided by the model for investigating the physical processes behind the development of the CMR.