A Multi-wavelength Survey of AGN in Massive Clusters: AGN Detection and Cluster AGN Fraction

Abstract

We aim to study the effect of environment on the presence and fuelling of Active Galactic Nuclei (AGN) in massive galaxy clusters. We explore the use of different AGN detection techniques with the goal of selecting AGN across a broad range of luminosities, AGN/host galaxy flux ratios, and obscuration levels. From a sample of 12 galaxy clusters at redshifts 0.5 < z < 0.9, we identify AGN candidates using optical variability from multi-epoch HST imaging, X-ray point sources in Chandra images, and mid-IR SED power-law fits through the Spitzer IRAC channels. We find 178 optical variables, 74 X-ray point sources, and 64 IR power law sources, resulting in an average of ~25 AGN per cluster. We find no significant difference between the fraction of AGN among galaxies in clusters and the percentage of similarly-detected AGN in field galaxy studies (~2.5%). This result provides evidence that galaxies are still able to fuel accretion onto their supermassive black holes, even in dense environments. We also investigate correlations between the percentage of AGN and cluster physical properties such as mass, X-ray luminosity, size, morphology class and redshift. We find no significant correlations among cluster properties and the percentage of AGN detected.

68 pages, 22 figures, 15 tables

References in corpus (15)

• The Mass Distribution of SDSS J1004+4112 Revisited
• A complete sample of twelve very X-ray luminous galaxy clusters at z>0.5
• Optical spectroscopy and X-ray detections of a sample of quasars and AGN selected in the mid-infrared from two Spitzer wide-area surveys
• A Wide-field Survey of Two Z~0.5 Galaxy Clusters: Identifying the Physical Processes Responsible for the Observed Transformation of Spirals into S0s
• Spitzer's Contribution to the AGN Population
• The Evolution of Active Galactic Nuclei in Clusters of Galaxies to Redshift 1.3
• Spectroscopic Confirmation of a Large AGN Population in Clusters of Galaxies
• The AGN fraction - velocity dispersion relation in clusters of galaxies
• The Type Ia Supernova Rate in Redshift 0.5--0.9 Galaxy Clusters
• Variability-selected active galactic nuclei from supernova search in the Chandra deep field south
• Variability and Multiwavelength Detected AGN in the GOODS Fields
• The DEEP Groth Strip Survey VI. Spectroscopic, Variability, and X-ray Detection of AGN
• Optical Variability of Infrared Power Law-Selected Galaxies & X-ray Sources in the GOODS-South Field
• A Multi-Wavelength Study of Low Redshift Clusters of Galaxies I. Comparison of X-ray and Mid-Infrared Selected AGNs
• The colour-magnitude relations of ClJ1226.9+3332, a massive cluster of galaxies at z=0.89

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• The Evolution of Active Galactic Nuclei in Clusters of Galaxies from the Dark Energy Survey
• Hidden Starbursts and Active Galactic Nuclei at 0<z<4 from the Herschel-VVDS-CFHTLS-D1 Field: Inferences on Coevolution and Feedback
• The Variable Sky of Deep Synoptic Surveys
• Effect of richness on AGN and star formation activities in SDSS galaxy groups
• A Multiwavelength Study of the Massive Cool Core Cluster MACS J1447.4+0827
• A Multi-wavelength Survey of AGN in Massive Clusters: AGN Distribution and Host Galaxy Properties
• The AGN fraction in high-redshift protocluster candidates selected by Planck and Herschel
• Environmental Effects on AGN activity via Extinction-free Mid-Infrared Census
• Enhanced AGN Activity in Overdense Galactic Environments at $2<z<4$
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