Measuring the Effects of AGN Activity on the Intergalactic Medium

Type Conference Paper
Names Hanna Herbst, K. Hess, E. Wilcots
Proceedings Title Bulletin of the American Astronomical Society
Conference Name American Astronomical Society, AAS Meeting #217, #149.07
Volume 43
Pages 14907
Date January 1, 2011
Library Catalog NASA ADS
Abstract Our current understanding of the formation and evolution of galaxy groups and clusters is impeded by a major problem. Models of gravitational collapse predict that the cores of galaxy groups should have had sufficient time to cool, but no observations have shown evidence of the cool gas that should reside in the cores. This means there must be some source of non-gravitational energy that is heating the intergalactic medium (IGM) and hindering the cooling flows. The two most likely sources are starburst driven galactic outflows or galactic outflows from active galactic nuclei (AGN). Here, we study AGN powered galactic outflows in NGC 1052 and NGC 741 as a possible source of the excess non-gravitational heating seen in x-ray observations. VLA data is used to estimate the total output of the radio jets, which is then compared the observed x-ray luminosity of the IGM, in order to determine to what extent AGN outflows could be responsible for the heating of the IGM.
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