| |
 |
| Paper: |
Mid-Infrared Evidence for Accelerated Evolution in Compact Group Galaxies |
| Volume: |
423, Galaxy Wars: Star Formation and Stellar Populations in Interacting Galaxies |
| Page: |
88 |
| Authors: |
Walker, L. M.; Johnson, K. E.; Gallagher, S. C.; Hibbard, J. E.; Hornschemeier, A. E.; Charlton, J. C.; Jarrett, T. H. |
| Abstract: |
We find evidence for accelerated evolution in compact group galaxies from the distribution in mid-infrared colorspace of 42 galaxies from 12 Hickson Compact Groups (HCGs) compared to the distributions of several other 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. Neither the Coma Center or interacting samples show evidence of a gap, leading us to speculate that the gap is unique to the environment of high galaxy density where gas has not been fully processed or stripped. |
|
|
|
|
|
