Evolution of dwarf galaxies in the Centaurus A group

Details Evolution of dwarf galaxies in the Centaurus A group Evolution of dwarf galaxies in the Centaurus A group

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009an....330.1001c&link_type=abstract

Astronomische Nachrichten, Vol.330, Issue , p.1001

Astronomy and Astrophysics

Astronomy

Galaxies: Dwarf, Galaxies: Evolution, Galaxies: Photometry, Galaxies: Stellar Content

Scientific paper

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.

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