J/MNRAS/446/2709ivo://CDS.VizieR/J/MNRAS/446/2709doi:10.26093/cds/vizier.74462709CDSEhlert S.Allen S.W.Brandt W.N.Canning R.E.A.Luo B.Mantz A.,Morris R.G.von der Linden A.Xue Y.Q.2024-08-14T20:18:54Z2015-11-09T11:11:48ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frgalaxy-clustersx-ray-sourcesactive-galactic-nucleigalaxy-classification-systemsWe present the results of a new analysis of the X-ray selected active galactic nuclei (AGN) population residing in and behind 135 of the most massive galaxy clusters in the redshift range of 0.2<z<0.9 observed with Chandra. With a sample of more than 11000 X-ray point sources, we are able to measure, for the first time, evidence for evolution in the cluster AGN population beyond the expected evolution of field AGN. Our analysis shows that overall number density of cluster AGN scales with the cluster mass as ~M_500_-1.2. There is no evidence for the overall number density of cluster member X-ray AGN depending on the cluster redshift in a manner different than field AGN, nor is there any evidence that the spatial distribution of cluster AGN (given in units of the cluster overdensity radius r_500_) strongly depends on the cluster mass or redshift. The M^-1.2+/-0.7^ scaling relation we measure is consistent with theoretical predictions of the galaxy merger rate in clusters, which is expected to scale with the cluster velocity dispersion, {sigma}, as ~{sigma}^-3^ or ~M^-1^. This consistency suggests that galaxy mergers may be an important contributor to the cluster AGN population, a result that is further corroborated by visual inspection of Hubble images for 23 spectroscopically confirmed cluster member AGN in our sample. A merger-driven scenario for the triggering of X-ray AGN is not strongly favoured by studies of field galaxies, however, suggesting that different mechanisms may be primarily responsible for the triggering of cluster and field X-ray AGN.2015MNRAS.446.2709Ehttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/446/2709CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIX/29 : ROSAT All-Sky Survey Faint Source Catalog (Voges+ 2000)J/MNRAS/301/881 : The ROSAT brightest cluster sample - I. (Ebeling+, 1998)J/A+A/425/367 : REFLEX Galaxy Cluster Survey catalogue (Boehringer+, 2004)J/ApJS/172/561 : The 400d cluster Survey (Burenin+, 2007)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/446/2709https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/446/2709http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/446/2709https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/446/2709https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/446/2709http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/446/2709GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/446/2709/table1 (*Summary of the cluster sample and Chandra observations (either ACIS-I or ACIS-S) listed in order of cluster redshift)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/446/2709/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/446/2709/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/446/2709/table1?GETtext/xml+votable180.050000true243.9415-6.14819720.0055555555555555566/821 4406 4512 4859 4867 4965 5099-5100 5299 5305 5569 5701 5731 5795 5881 5985 6383 6539 7242 7604 7904 8033 8282 8921 8969 9052 9466 9476 9498 9632 9764 9997 10607 10664 10694 10743 10992 11042 11080 11194 11467 11596 11806-11807 11974 12642 13314 13384 16486 16609 16702 16787 17171 17222 17457 17472 17499 17618 18328 18475 18534 18746 18894 19009 19097 19542 19848 19950 20292 20536 21211 22607 22661 22771 22915 22949 22972 23173 23176 23195 23324 23349 23366 23474 25188 25451 25675 26037 26177 26707 27075 27428 27476 27740 28086 28376 28448 28512 28535 28622 30946 32379 34139 34159 34165 34416 34512 34726 35147 35271 35310 35683 35696 35853 35950 36028 36082 36089 36131 36231 36423 36547 36826 38973 39067 44563 44697 45044 45962 47043 48076 48174 48272 48423 49012https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/446/2709?format=asciiX-rayOpticaldefaultJ/MNRAS/446/2709/table1*Summary of the cluster sample and Chandra observations (either ACIS-I or ACIS-S) listed in order of cluster redshiftSimbadNameSimbad column added by the CDSmeta.idcharDetPrimary detector array usedinstr.setup;instr.detcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClusterCluster namemeta.id;meta.maincharn_Cluster[a] a: Clusters included in Paper I (Ehlert et al., 2013MNRAS.428.3509E)meta.notecharzRedshiftsrc.redshiftfloatRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainObsIDChandra observation numbermeta.numberintObsDateObservation datetime.epoch;obsnullableTexpExposure time, after cleaningkstime.duration;obs.exposurefloatM500M500 for the cluster1e+14solMassphys.massfloatr500r500Mpcphys.size.radiusfloatNHEquivalent Galactic hydrogen column density in the direction of the cluster1e+20cm**-2phys.columnDensity;pos.galacticfloatr12'Equivalent radius of 12 arcmin for each cluster in units of r500, which denotes the maximum radius sampledphys.size.radius;arith.ratiofloat