AGN Heating in Fossil Galaxy Groups -- A Joint Chandra and GMRT Study.

Details AGN Heating in Fossil Galaxy Groups -- A Joint Chandra and GMRT Study. AGN Heating in Fossil Galaxy Groups -- A Joint Chandra and GMRT Study.

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009cfdd.confe.121j&link_type=abstract

Chandra's First Decade of Discovery, Proceedings of the conference held 22-25 September, 2009 in Boston, MA. Edited by Scott Wo

Physics

Galaxies

Scientific paper

We present a sample of fossil galaxy groups with pre-existing Chandra and/or XMM-Newton X-ray observations and new low frequency GMRT data. Fossil galaxy groups are ideal laboratories for studying feedback mechanisms and how energy injection affects the IGM, since due to the lack of recent merging activity, we expect the IGM to be relatively pristine and affected only by any AGN activity that has occurred in the group. Our Chandra X-ray observations reveal features resembling AGN-inflated bubbles, whilst our GMRT radio data show evidence of extended emission from the central AGN that may be filling the bubble. This has enabled us to estimate the work done by the central AGN, place limits on the rates of energy injection and discuss the nature of the plasma filling the bubble.

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