Radio and X-ray Properties of Cavities in the Hot Atmospheres of Ellipticals, Groups, and Clusters

Details Radio and X-ray Properties of Cavities in the Hot Atmospheres of Ellipticals, Groups, and Clusters Radio and X-ray Properties of Cavities in the Hot Atmospheres of Ellipticals, Groups, and Clusters

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20919701b&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #197.01; Bulletin of the American Astronomical Society,

Astronomy and Astrophysics

Astronomy

Scientific paper

Motivated by the impact that active galactic nuclei (AGN) can have on large scale structure formation and on the intracluster environment, we investigate the properties of the AGN at the cluster core. We present new, high resolution radio images of sources associated with cD galaxies and X-ray cavities located in cluster cores. The cavity properties derived from archival Chandra observations give reliable estimates of the total jet power and age independently of the radio synchrotron flux. We combine the X-ray data and VLA radio images at multiple frequencies to investigate several fundamental properties of cluster radio sources, including their radiative (mechanical) efficiencies, magnetic field contents, and particle contents, and we evaluate the assumption of equipartition in these systems. We show that high radio frequencies probe the current AGN output, while frequencies at or below 327 MHz trace the history of AGN activity in the cores of clusters over the past several hundred million years.

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