New Results on the AGN Population in Clusters of Galaxies

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Scientific paper

We have analyzed archival Chandra observations of ten low-redshift (z < 0.3) clusters of galaxies to identify AGN in cluster members. Spectroscopy of X-ray sources with optically-bright counterparts reveals that a significant fraction are cluster members and suggests the fraction of AGN in bright cluster galaxies is ~ 5%. The fraction of AGN in any given cluster, however, appears to vary considerably from cluster to cluster and may depend on a cluster's properties. The host galaxy population in clusters also varies significantly, ranging from galaxies dominated by old stellar populations in some clusters, to starforming and poststarburst populations in others.

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