Dwarf galaxies in Hickson Compact Groups

Details Dwarf galaxies in Hickson Compact Groups Dwarf galaxies in Hickson Compact Groups

2006-08-07

arxiv.org/abs/astro-ph/0608147v1

Astronomy and Astrophysics

Astrophysics

5 pages, 4 figures, to appear in the proceedings of the ESO Astrophysics Symposium: "Groups of Galaxies in the Nearby Universe

Scientific paper

We observed 5 Hickson Compact Groups with the ESO/MPI 2.2m telescope and WFI to investigate the dwarf galaxy content and distribution in these galaxy groups. Our deep imaging and careful selection of the candidate galaxies revealed a rich population of mainly passively evolving dwarf galaxies, which is spatially much more extended than the originally defined Hickson Compact groups. The composite luminosity function of the 5 groups shows a bimodal structure with a very steep rise in the low luminosity regime. The faint end slope is close to the predictions of CDM theory for the slope of the Dark Matter halo mass function.

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