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Evolution of dwarf galaxies in the Centaurus A group

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<mark>Journal publication date</mark>4/11/2009
<mark>Journal</mark>Astronomical Notes / Astronomische Nachrichten
Issue number9-10
Volume330
Number of pages3
Pages (from-to)1001-1003
Publication StatusPublished
<mark>Original language</mark>English

Abstract

The study of (dwarf) galaxies in nearby groups is one among the most powerful tools that can be used to investigate galaxy evolution, chemical enrichment and environmental effects on these objects. The Centaurus A group (at a distance of ∼4 Mpc) is dynamically evolved and contains about 30 dwarf companions of different morphologies and stellar contents. Here we present the first results for the dwarf spheroidal galaxy population in this group. We use archival HST/ACS data to study their resolved stellar content. The resulting metallicity distribution functions reveal metal-poor populations and wide metallicity spreads for each galaxy. We find no clear trend of the derived physical properties as a function of galaxy position in the group. Finally, we compare our results to the dwarf population of the Local Group, and find no outstanding differences.