Physics
Scientific paper
Sep 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009cfdd.confe.214y&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
Clusters Of Galaxies
Scientific paper
We report a statistical study of contents of active galactic nuclei (AGNs) in galaxy clusters using the data of 68 galaxy clusters from the Chandra archive. The redshifts of the clusters range from 0.2 to 1.3, with median redshift of 0.38. The ensemble averaged surface density distribution of point sources show clear excess within virial radius (r_{200}) while away from the cluster the surface density of point sources agree with that of non-cluster fields. We found that the average deprojected radial density profile of X-ray selected AGNs have similar shape as normal galaxies rather than radio loud AGNs. On average the normalization of the cluster X-ray luminosity functions (XLFs) within r_{200} are ˜ 324 and 231 times higher than that of the field luminosity function in the 0.5-2 and 2-8 keV bands respectively. This translate to an AGN fraction in clusters is (73 ± 21)% of the field value in the soft band, and (52 ± 18)% in the hard band.
Mohr Joseph John
O'Hara Tim
Yang Yu-xuan
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