The dwarf galaxy population in the outer regions of the Antlia Cluster

JUAN PABLO CALDERÓN; LILIA P. BASSINO; ANALÍA V. SMITH CASTELLI; SERGIO A. CELLONE; TOM RICHTLER; MARTIN GÓMEZ

Santiago de Chile

Workshop; Dynamics of Low-Mass Stellar Systems: From Star Clusters to Dwarf Galaxies; 2011

European Southern Observatory (ESO)

We present a photometric study of early-type dwarf galaxies located in the outer regions of the Antlia cluster. The integrated  color-magnitude (CMR) and luminosity-mean surface brightness (LSBR) relations} that they follow are compared to the ones obtained at the cluster center by Smith Castelli et al.(2008).They all share the same CMR, ranging from the two central giant ellipticals NGC 3258 and NGC 3268 at the bright end down to the faintest dwarfs. The surface brightness profiles of a subsample of dwarfs are fitted with Sérsic models and the resulting parameters and scaling relations are also analyzed. The results presented here correspond to the first stages of J.P. Calderón PhD Thesis.