Physics
Scientific paper
Apr 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aps..oss.b6004r&link_type=abstract
American Physical Society, Ohio Section Spring 2004, April 16-17, 2004, Ohio University, Athens, Ohio, MEETING ID: OSS04, abstra
Physics
Scientific paper
With an analysis of sixteen galaxy clusters, one group, and one galaxy drawn from the Chandra X-ray Observatory's data archive, we evaluate the hypothesis that cooling of the intracluster medium can be quenched with energy injected by rising bubbles created by the radio source. We find that the instantaneous mechanical luminosities in the bubbles required to offset cooling range between 1-20 pV per bubble. Nearly half of the systems in this study may have instantaneous mechanical luminosities large enough to balance cooling, at least for a short period of time, if the bubbles are filled with a relativistic gas. We find a trend or upper envelope in the distribution of central X-ray luminosity versus instantaneous mechanical luminosity with the sense that the most powerful bubbles are found in the most X-ray luminous systems. Such a trend would be expected if many of these systems produce bubbles at a rate that scales in proportion to the cooling rate of the surrounding gas.
Birzan Laura
McNamara Brian
Nulsen Paul E. J.
Rafferty David
Wise Michael Wayne
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