A multiwavelength study of active galactic nuclei in clusters of galaxies

Details A multiwavelength study of active galactic nuclei in clusters of galaxies A multiwavelength study of active galactic nuclei in clusters of galaxies

Nov 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010phdt........89h&link_type=abstract

ProQuest Dissertations And Theses; Thesis (Ph.D.)--University of Colorado at Boulder, 2010.; Publication Number: AAT3419466; ISB

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Clusters of galaxies offer a unique laboratory for studying the effects of environment on the properties of Active Galactic Nuclei (AGN), and conversely, the feedback effects of AGN on their environment. Recent observations of cluster cores reveal cavities in the X-ray emission of the intracluster medium (ICM). With obvious signs of altering the gas properties of the ICM, cluster AGN can be used to investigate feedback mechanisms in dense cluster environments. This thesis incorporates multiwavelength observations of clusters of galaxies to identify radio galaxies and X-ray points sources (XPSs) within 1 Mpc of the cluster center and presents a first look at the evolution of these objects in a consistent manner. Guided by the results of cosmological simulations, 23 clusters of galaxies between 0.21042 erg s-1. Except for one XPS, the cluster radio galaxies and XPSs are hosted by passive galaxies that are more centrally concentrated than their parent population. We suggest that cluster XPSs are low-luminosity BL Lac objects, similar in nature to the radio galaxies. We estimate that all L>L* cluster red sequence galaxies are radio-loud and possess jets. We suggest that >50% of the lower-power radio sources below our detection limits supply the majority of the heat to the ICM. The radio luminosity function of cluster radio galaxies reveals number and luminosity evolution in Coma Cluster progenitors from 0.4

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