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Dwarf galaxies beyond our doorstep: the Centaurus A group

Citation

Crnojevic, D and Grebel, E and Cole, AA and Koch, A and Rejkuba, M and Da Costa, G and Jerjen, H, Dwarf galaxies beyond our doorstep: the Centaurus A group, Proceedings of CRAL2010: A Universe of Dwarf Galaxies, 14-18 June 2010, Lyon, France, pp. 1-7. (2011) [Non Refereed Conference Paper]


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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 30 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 Details

Item Type:Non Refereed Conference Paper
Research Division:Physical Sciences
Research Group:Astronomical and Space Sciences
Research Field:Galactic Astronomy
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Physical Sciences
Author:Cole, AA (Dr Andrew Cole)
ID Code:71084
Year Published:2011
Deposited By:Physics
Deposited On:2011-07-07
Last Modified:2014-07-10
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