| Type |
Conference Paper |
| Names |
Kelley M. Hess, E. M. Wilcots, M. P. Haynes, R. Giovanelli, ALFALFA Team |
| Proceedings Title |
Bulletin of the American Astronomical Society |
| Conference Name |
American Astronomical Society, AAS Meeting #217, #115.03 |
| Volume |
43 |
| Date |
January 1, 2011 |
| URL |
http://adsabs.harvard.edu/abs/2011AAS...21711503H |
| Library Catalog |
NASA ADS |
| Abstract |
We present the HI content of galaxies and galaxy groups in the
Coma-Abell 1367 Supercluster derived from a 180 square degree strip of
the ALFALFA survey between +24d and +28d from 11h to 14h. We use this
data to present a complete view of the neutral gas content in galaxy
groups as a function of the large scale environment and derive a group
HI mass function. The galaxy groups, derived from SDSS, span a range of
global environments from the highest density sub-clumps falling into the
center of the Coma cluster, to groups that make up the filament between
the Coma and Abell 1367, to poor groups that exist on the edges of
voids. Using the results from ALFALFA as well as widefield imaging and
GALEX UV data we test the idea that the majority of galaxy evolution
happens in groups prior to their in-fall into a galaxy cluster. In
addition we correlate the frequency of low luminosity AGN activities
with the HI properties of the environment. Together these
multi-wavelength observations show how the HI content, the star
formation rate and the AGN frequency change as a function of local
galaxy density and distance from the cluster center and show how the
role of environment affects galaxy evolution. |