Mid-Infrared Evidence for Accelerated Evolution in Compact Group Galaxies

Details Mid-Infrared Evidence for Accelerated Evolution in Compact Group Galaxies Mid-Infrared Evidence for Accelerated Evolution in Compact Group Galaxies

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21541017w&link_type=abstract

American Astronomical Society, AAS Meeting #215, #410.17; Bulletin of the American Astronomical Society, Vol. 42, p.237

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Scientific paper

We find evidence for accelerated evolution in compact group galaxies from the mid-infrared distribution in colorspace of 42 galaxies from 12 Hickson Compact Groups (HCGs) and the distributions of several comparison samples including the LVL+SINGS galaxies, interacting galaxies, and galaxies from the Coma Cluster. We find that the HCG galaxies are not uniformly distributed in colorspace, as well as quantitative evidence for a gap. Galaxies in the infall region of the Coma cluster also exhibit a non-uniform distribution and a less well defined gap, which may reflect a similarity with the compact group environment. None of the other samples we studied show evidence of a gap, leading us to speculate that it is unique to the environment present in compact groups and clusters; one of high density where gas has not been fully processed or stripped.

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