Compact Groups of Galaxies: Small, Dense, and Elusive

Details Compact Groups of Galaxies: Small, Dense, and Elusive Compact Groups of Galaxies: Small, Dense, and Elusive

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aspc..421..279p&link_type=abstract

Galaxies in Isolation: Exploring Nature Versus Nurture, proceedings of a conference held 12 to 15 May 2009 in Granada, Spain. Ed

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Scientific paper

We have conducted two surveys of compact groups of galaxies in the Southern hemisphere, one at z ≤ 0.03 and another at 0.05 ≤ z ≤ 0.2, with the aim of studying the evolution of the group member galaxies and the groups themselves. Most of the observed targets are physically bound structures with a high density on the sky and a crossing time τ ≤ 1 Gyr. We conclude that either compact groups are stabilized somehow by their dark matter halo or that we observed two distinct generations of compact groups.

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