1.4GHz Survey of Fossil Groups

Details 1.4GHz Survey of Fossil Groups 1.4GHz Survey of Fossil Groups

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21543624h&link_type=abstract

American Astronomical Society, AAS Meeting #215, #436.24; Bulletin of the American Astronomical Society, Vol. 42, p.388

Astronomy and Astrophysics

Astronomy

Scientific paper

Fossil groups, luminous, isolated elliptical galaxies with extended x-ray halos, represent the remnants of galactic cannibalism within galaxy groups. Current research has concentrated primarily on visible and x-ray observations. Here, we report the results of a preliminary survey of 34 fossil groups observed at 1.4Ghz using the VLA. We detect radio sources in many of the groups. Using radio emission as a tracer for nuclear activity, we estimate the frequency of past and current AGN activity in fossil groups and extract information about the age and evolutionary history of the fossil groups. Further observations at multiple radio frequencies may then provide information about the role of minor mergers and AGN as sources of heat in the IGM and as remedies to the cooling flow problem.

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