AGN triggering in the infall regions of distant X-ray luminous galaxy clusters at 0.9 < z <~ 1.6

Abstract

Observational constraints on the average radial distribution profile of AGN in distant galaxy clusters can provide important clues on the triggering mechanisms of AGN activity in dense environments and are essential for a completeness evaluation of cluster selection techniques in the X-ray and mm-wavebands. The aim of this work is a statistical study with XMM-Newton of the presence and distribution of X-ray AGN in the large-scale structure environments of 22 X-ray luminous galaxy clusters in the redshift range 0.9 < z \lesssim 1.6 compiled by the XMM-Newton Distant Cluster Project (XDCP). To this end, the X-ray point source lists from detections in the soft-band (0.35-2.4 keV) and full-band (0.3-7.5 keV) were stacked in cluster-centric coordinates and compared to average background number counts extracted from three independent control fields in the same observations. A significant full-band (soft-band) excess of \sim78 (67) X-ray point sources is found in the cluster fields within an angular distance of 8' (4Mpc) at a statistical confidence level of 4.0 sigma (4.2 sigma), corresponding to an average number of detected excess AGN per cluster environment of 3.5\pm0.9 (3.0\pm0.7). The data point towards a rising radial profile in the cluster region (r<1Mpc) of predominantly low-luminosity AGN with an average detected excess of about one point source per system, with a tentative preferred occurrence along the main cluster elongation axis. A second statistically significant overdensity of brighter soft-band detected AGN is found at cluster-centric distances of 4'-6' (2-3Mpc), corresponding to about three times the average cluster radius R200 of the systems. If confirmed, these results would support the idea of two different physical triggering mechanisms of X-ray AGN activity in dependence of the radially changing large-scale structure environment of the distant clusters.

arXiv comment18 pages, 7 color figures, accepted for publication in Advances in Astronomy for the special issue 'Seeking for the Leading Actor on the Cosmic Stage: Galaxies versus Supermassive Black Holes'

References in corpus (41)

• The many lives of active galactic nuclei: cooling flows, black holes and the luminosities and colours of galaxies
• The Sloan Digital Sky Survey Quasar Catalog IV. Fifth Data Release
• Stellar and total baryon mass fractions in groups and clusters since redshift 1
• Clusters of Galaxies in the First Half of the Universe from the IRAC Shallow Survey
• Discovery of an X-ray-Luminous Galaxy Cluster at z=1.4
• A mature cluster with X-ray emission at z=2.07
• The XMM Cluster Survey: A Massive Galaxy Cluster at z=1.45
• The XMM-LSS survey: the Class 1 cluster sample over the initial 5 square degrees and its cosmological modelling
• The XMM-Newton wide-field survey in the COSMOS field II: X-ray data and the logN-logS
• Spectroscopic Confirmation of a Massive Red-Sequence-Selected Galaxy Cluster at z = 1.34 in the SpARCS-South Cluster Survey
• Multi-wavelength study of XMMU J2235.3-2557: the most massive galaxy cluster at z > 1
• The XMM Cluster Survey: Active Galactic Nuclei and Starburst Galaxies in XMMXCS J2215.9-1738 at z=1.46
• Chandra and XMM-Newton Observations of RDCS1252.9-2927, A Massive Cluster at z=1.24
• The Evolution of Active Galactic Nuclei in Clusters of Galaxies to Redshift 1.3
• The X-ray luminous galaxy cluster population at 0.9<z<~1.6 as revealed by the XMM-Newton Distant Cluster Project
• The XMM Cluster Survey: Galaxy Morphologies and the Color-Magnitude Relation in XMMXCS J2215.9-1738 at z=1.46
• The Cosmic Evolution of AGN in galaxy clusters
• First Measurement of a Rapid Increase in the AGN Fraction in High-Redshift Clusters of Galaxies
• The Origin of the Spatial Distribution of X-ray luminous AGN in Massive Galaxy Clusters
• An Intensive HST Survey for z>1 Supernovae by Targeting Galaxy Clusters
• Discovery of a massive X-ray luminous galaxy cluster at z=1.579
• The XMM-Newton Serendipitous Survey. II. First results from the AXIS high galactic latitude medium sensitivity survey
• The XMM-LSS survey: optical assessment and properties of different X-ray selected cluster classes
• The distribution of AGN in a large sample of galaxy clusters
• The XMM Cluster Survey: The Dynamical State of XMMXCS J2215.9-1738 at z=1.457
• X-ray source overdensities in Chandra distant cluster fields: a new probe to map the cosmic tapestry?
• The AGN content of the z=0.83 cluster MS1054-0321
• A Chandra view of the z=1.62 galaxy cluster IRC-0218A
• Testing the galaxy cluster mass-observable relations at z = 1 with XMM-Newton and Chandra observations of XLSSJ022403.9-041328
• Multi-wavelength observations of a rich galaxy cluster at z ~ 1: the HST/ACS colour-magnitude diagram
• A pan-chromatic view of the galaxy cluster XMMU J1230.3+1339 at z=0.975 - Observing the assembly of a massive system
• Luminous X-ray AGN in Clusters of Galaxies
• Star Formation Activities of Galaxies in the Large-Scale Structures at z=1.2
• Spectroscopic identifications of Spitzer sources in the SWIRE/XMM-NEWTON/ELAIS-S1 field: a large fraction of Active Galactic Nuclei with high F(24micron)/F(R) ratio
• The XMM-Newton survey of the ELAIS-S1 field II: optical identifications and multiwavelength catalogue of X-ray sources
• XMMU J100750.5+125818: A strong lensing cluster at z=1.082
• The Evolution and Environments of X-ray Emitting Active Galactic Nuclei in High-Redshift Large-Scale Structures
• Chandra point-source counts in distant galaxy clusters
• First simultaneous optical/near-infrared imaging of an X-ray selected, high-redshift cluster of galaxies with GROND: the galaxy population of XMMU J0338.7+0030 at z=1.1
• Indications for 3 Mpc-scale large-scale structure associated with an X-ray luminous cluster of galaxies at z=0.95
• Exploring the galaxy cluster-group transition regime at high redshifts: Physical properties of two newly detected z > 1 systems

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• The Era of Star Formation in Galaxy Clusters
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• An X-ray Detected Group of Quiescent Early-type Galaxies at z=1.6 in the Chandra Deep Field South
• The Massive and Distant Clusters of WISE Survey IV: The Distribution of Active Galactic Nuclei in Galaxy Clusters at $z\sim 1$
• High density of active galactic nuclei in the outskirts of distant galaxy clusters
• X-ray AGN in the XMM-LSS galaxy clusters: no evidence of AGN suppression
• Star formation and quenching among the most massive galaxies at z~1.7
• The XXL Survey: XII. Optical spectroscopy of X-ray-selected clusters and the frequency of AGN in superclusters
• Environmental dependence of AGN activity and star formation in galaxy clusters from Magneticum simulations
• Excess cataloged X-ray and radio sources at galaxy-cluster virial shocks
• XXL-HSC: Host properties of X-ray detected AGNs in XXL clusters
• Spectroscopic characterization of the protocluster of galaxies around 7C 1756+6520 at z ~ 1.4
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