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We present a study of the population of bright early-type dwarf galaxies inthe multiple-cluster system Abell 901/902. We use data from the STAGES surveyand COMBO-17 to investigate the relation between the color and structuralproperties of the dwarfs and their location in the cluster. The definition ofthe dwarf sample is based on the central surface brightness and includesgalaxies in the luminosity range -16 >= M_B >~-19 mag. Using a fit to the colormagnitude relation of the dwarfs, our sample is divided into a red and bluesubsample. We find a color-density relation in the projected radialdistribution of the dwarf sample: at the same luminosity dwarfs with reddercolors are located closer to the cluster centers than their bluer counterparts.Furthermore, the redder dwarfs are on average more compact and rounder than thebluer dwarfs. These findings are consistent with theoretical expectationsassuming that bright early-type dwarfs are the remnants of transformedlate-type disk galaxies involving processes such as ram pressure stripping andgalaxy harassment. This indicates that a considerable fraction of dwarfelliptical galaxies in clusters are the results of transformation processesrelated to interactions with their host cluster.

Relating basic properties of bright early-type dwarf galaxies to their location in Abell 901/902