Martini, P., Kelson, D.D., Mulchaey, J.S., and Athey, A. 2003, Carnegie Observatories Astrophysics Series, Vol. 3: Clusters of Galaxies: Probes of Cosmological Structure and Galaxy Evolution , ed. J. S. Mulchaey, A. Dressler, and A. Oemler (Pasadena: Carnegie Observatories, available here")
We have analyzed deep, chandra observations of several clusters of galaxies to identify Active Galactic Nuclei (AGN). Comparison of these X-ray observations with ground-based imaging reveals that some of these X-ray sources are associated with optically-bright counterparts. Our spectroscopy of these sources reveals that many are cluster members. These results imply the AGN fraction in clusters is higher than expected and has implications for the impact of the cluster environment on galaxy evolution, the fueling of AGN, the growth of supermassive black holes, and the role of AGN feedback in heating the intracluster medium.
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