J/A+A/674/A102ivo://CDS.VizieR/J/A+A/674/A102doi:10.26093/cds/vizier.36740102CDSWang L.Tozzi P.Yu H.Gaspari M.Ettori S.2024-11-28T20:03:33Z2023-06-08T07:55:50ZCDS support team

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

cds-question@unistra.frgalaxy-clustersx-ray-sourcesgalaxy-kinematicsWe investigate the properties of cool cores in an optimally-selected sample of 37 massive and X-ray-bright galaxy clusters, with regular morphology, observed with Chandra, by measuring the density, temperature, and abundance radial profiles of their intracluster medium (ICM). From these independent quantities we compute the cooling (t_cool_), free-fall (t_ff_), and turbulence (t_eddy_) timescales as a function of radius. By requiring the profile-crossing condition t_cool_/t_eddy_=1, we measure the cool-core condensation radius R_ccc_ within which the balancing feeding and feedback processes generate the turbulent condensation rain and related chaotic cold accretion (CCA). We also constrain the complementary (quenched) cooling flow radius R_qcf_, obtained via the condition t_cool_=25xt_ff_, that encompasses the region of thermally unstable cooling. We find that in our our massive cluster sample and in the limited redshift range considered (1.3x10^14^<M500<16.6x10^14^M_{sun}_, 0.03<z<0.29) the distribution of R_ccc_ is peaked at ~0.01r_500_ and entirely included below ~0.07r_500_, with a very weak increase with redshift and no dependence on the cluster mass.We find that Rqcf is typically 3x larger than R_ccc_, has a wider distribution, and grows slowly with R_ccc according to an average relation R_qcf_~~R_ccc_^0.46^, with a large intrinsic scatter. We suggest that this sub-linear relation can be understood as an effect of the micro rain of pockets of cooled gas flickering in the turbulent ICM, whose dynamical and thermodynamical properties are referred to as "macro weather". Substituting the classical ad-hoc cool-core radius R7.7Gyr, we propose that R_qcf_ is an indicator of the size of global cool cores tied to the long-term macro weather, with the inner R_ccc closely tracing the effective condensation rain and chaotic cold accretion (CCA) zone that feeds the central supermassive black hole (SMBH).2023A&A...674A.102Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/674/A102CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/674/A102https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/674/A102http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/674/A102https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/674/A102https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/674/A102http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/674/A102GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/674/A102/table1 (clusters observed with Chandra and satisfying the criteria defined in Section 3)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/674/A102/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/674/A102/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/674/A102/table1?GETtext/xml+votable180.050000true247.154166739.52444440.0055555555555555566/87 361 4867 5881 7345 8220 8268 8788 8969 9468 9506 16713 17141 17237 19097 20021 20083 22577 23284 24853 26037 26785 27428 28220 31509 31537 34443 38858 40615 40777 44108 44502 44802 45044 45421 46484 48688https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/674/A102?format=asciiX-raydefaultJ/A+A/674/A102/table1clusters observed with Chandra and satisfying the criteria defined in Section 3recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDEJ2000Cluster center declination (J2000)pos.eq.decTexpExposure time after data reductionkstime.duration;obs.exposurefloatSimbadNameSimbad column added by the CDSmeta.idcharnullable_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainzRedshiftsrc.redshiftfloatRAJ2000Cluster center right ascension (J2000)pos.eq.raCountsNet photon counts within 40kpc in the 0.5-7.0 keV bandctphot.count;em.X-raydoubleObsIDObsid used in the analysis (ACIS-S and ACIS-I observations are marked with (S) and (I), separated by comameta.id;obschar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.mainClusterCluster namemeta.id;meta.maincharJ/A+A/674/A102/table2Results of our analysis for all the clusters in our sampleClusterCluster namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintr500Radius at which the average density of a cluster is 500 times the critical density of the Universekpcphys.size.radiusintTCore-excised temperature (for r>40kpc and r<r_500_)keVphys.temperaturefloate_TTemperature lower limit of errorkeVstat.errorfloatE_TTemperature upper limit of errorkeVstat.error;stat.maxfloatM500Total mass within R5001e+14solMassphys.massfloate_M500Mass lower limit of error1e+14solMassstat.errorfloatE_M500Mass upper limit of error1e+14solMassstat.error;stat.maxfloatsigmavVelocity dispersion sigma_v calculated from equation 9km/sphys.veloc.dispersion;meta.modelledfloate_sigmavVelocity dispersion lower limit of errorkm/sstat.errorfloatE_sigmavVelocity dispersion upper limit of errorkm/sstat.error;stat.maxfloatl_RcccLimit flag on Rcccmeta.code.errorcharRcccCool-core condensation radius defined by the condition t_cool_(R_ccc_)/t_eddy_(R_ccc_)=1kpcphys.size.radiusfloate_Rccc? Cool-core condensation radius lower limit of errorkpcstat.errorfloatnullableE_Rccc? Cool-core condensation radius upper limit of errorkpcstat.error;stat.maxfloatnullablel_RqcfLimit flag on Rqcfmeta.code.errorcharRqcfQuenched cooling flow radius defined by the condition t_cool_(R_qcf_)/[25*t_ff_(R_qcf_)]=1kpcphys.size.radiusfloate_Rqcf? Quenched cooling flow radius lower limit of errorkpcstat.errorfloatnullableE_Rqcf? Quenched cooling flow radius upper limit of errorkpcstat.error;stat.maxfloatnullablel_Rccc500Limit flag on Rccc500meta.code.errorcharRccc500Cool-core condensation radius in units of 10^-2^*r_500_phys.size.radius;arith.ratiofloate_Rccc500? Cool-core condensation radius in units of 10^-2^*r_500_ lower limit of errorstat.errorfloatnullableE_Rccc500? Cool-core condensation radius in units of 10^-2^*r_500 _upper limit of errorstat.error;stat.maxfloatnullablel_Rqcfr500Limit flag on Rqcfr500meta.code.errorcharRqcfr500Quenched cooling flow radius in units of 10^-2^*r500phys.size.radius;arith.ratiofloate_Rqcfr500? Quenched cooling flow radius in units of 10^-2^*r_500_ lower limit of errorstat.errorfloatnullableE_Rqcfr500? Quenched cooling flow radius in units of 10^-2^*r_500_ upper limit of errorstat.error;stat.maxfloatnullableRef[abc] A reference of sigma_v measurements to each cluster (1)meta.ref;pos.framecharJ/A+A/674/A102/profileData for cooling (t_cool) and free-fall (t_ff) timescales profiles in the appendixrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClusterCluster namemeta.id;meta.maincharRadiusRadiuskpcphys.size.radiusfloattcoolCooling timescaleGyrtime.scalefloate_tcoolCooling timescale errorGyrstat.errordoubletffFree-fall timescaleGyrtime.scalefloate_tffFree-fall timescale errorGyrstat.errordouble