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2006•Proceedings of the International Astronomical UnionOpen access

The many faces of early-type dwarf galaxies

T. Lisker, E. K. Grebel, B. Binggeli, M. Vodička, K. Glatt, P. Westera

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Abstract

Abstract We present a study of 413 early-type dwarf (dE) galaxies in the Virgo Cluster with SDSS multicolour imaging. Several dE subclasses show systematic differences in shape, clustering properties, and stellar content. We find different colour-magnitude relations for nucleated and non-nucleated dEs, as well as for dE samples populating regions of different densities.

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Abstract We present a study of 413 early-type dwarf (dE) galaxies in the Virgo Cluster with SDSS multicolour imaging. Several dE subclasses show systematic differences in shape, clustering properties, and stellar content. We find different colour-magnitude relations for nucleated and non-nucleated dEs, as well as for dE samples populating regions of different densities.

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Available abstract

Abstract We present a study of 413 early-type dwarf (dE) galaxies in the Virgo Cluster with SDSS multicolour imaging. Several dE subclasses show systematic differences in shape, clustering properties, and stellar content. We find different colour-magnitude relations for nucleated and non-nucleated dEs, as well as for dE samples populating regions of different densities.

Key concepts: Virgo Cluster, Astrophysics, Physics, Dwarf galaxy, Galaxy, Cluster analysis, Elliptical galaxy, Astronomy

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