Dwarf galaxies beyond Our doorstep:the Centaurus Group

Crnojevic, D. and Grebel, E. K. and Cole, A. A. and Koch, Andreas and Rejkuba, M. and Costa, Gary Da and Jerjen, H. (2011) Dwarf galaxies beyond Our doorstep:the Centaurus Group. EAS Publications Series, 48. pp. 51-57. ISSN 1633-4760

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Abstract

The study of dwarf galaxies in groups is a powerful tool for investigating galaxy evolution, chemical enrichment and environmental effects on these objects. Here we present results obtained for dwarf galaxies in the Centaurus A complex, a dense nearby (∼4 Mpc) group that contains two giant galaxies and about 60 dwarf companions of different morphologies and stellar contents. We use archival optical (HST/ACS) and near-infrared (VLT/ISAAC) data to derive physical properties and evolutionary histories from the resolved stellar populations of these dwarf galaxies. In particular, for early-type dwarfs we are able to construct metallicity distribution functions, find population gradients and quantify the intermediate-age star formation episodes. For late-type dwarfs, we compute recent (∼1 Gyr) star formation histories and study their stellar distribution. We then compare these results with properties of the dwarfs in our Milky Way and in other groups. Our work will ultimately lead to a better understanding of the evolution of dwarf galaxies.

Item Type:
Journal Article
Journal or Publication Title:
EAS Publications Series
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2200
Subjects:
ID Code:
83613
Deposited By:
Deposited On:
14 Dec 2016 11:12
Refereed?:
No
Published?:
Published
Last Modified:
11 Jun 2020 05:12