J/ApJ/805/3ivo://CDS.VizieR/J/ApJ/805/3doi:10.26093/cds/vizier.18050003CDSElkholy T.Y.Bautz M.W.Canizares C.R.2023-12-19T10:20:16Z2015-09-29T09:36:53ZCDS support team

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

cds-question@unistra.frgalaxy-clustersx-ray-sourcesredshiftedchemical-abundancesA sample of 46 nearby clusters observed with Chandra is analyzed to produce radial density, temperature, entropy, and metallicity profiles, as well as other morphological measurements. The entropy profiles are computed to larger radii than in previous Chandra cluster sample analyses. We find that the iron mass fraction measured in the inner 0.15R_500_ shows a larger dispersion across the sample of low-mass clusters than it does for the sample of high-mass clusters. We interpret this finding as the result of the mixing of more halos in large clusters than in small clusters, leading to an averaging of the metallicity in the large clusters, and thus less dispersion of metallicity. This interpretation lends support to the idea that the low-entropy, metal-rich gas of merging halos reaches the clusters' centers, which explains observations of core-collapse supernova product metallicity peaks, and which is seen in hydrodynamical simulations. The gas in these merging halos would have to reach cluster centers without mixing in the outer regions. On the other hand, the metallicity dispersion does not change with mass in the outer regions of the clusters, suggesting that most of the outer metals originate from a source with a more uniform metallicity level, such as during pre-enrichment. We also measure a correlation between the metal content in low-mass clusters and the morphological disturbance of their intracluster medium, as measured by centroid shift. This suggests an alternative interpretation, whereby transitional metallicity boosts in the center of low-mass clusters account for the larger dispersion of their metallicities.2015ApJ...805....3Ehttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/805/3CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/chandra : The Chandra Archive Log (CXC, 1999-2014)VIII/76 : Leiden/Argentine/Bonn (LAB) Survey of Galactic HI (Kalberla+ 2005)J/A+A/575/A30 : HIFLUGCS XMM/Chandra cross-calibration (Schellenberger+, 2015)J/ApJ/774/23 : Chandra observations of SPT-SZ clusters (McDonald+, 2013)J/ApJS/199/23 : IR and UV star formation in ACCEPT BCGs (Hoffer+, 2012)J/ApJS/182/12 : ICM entropy profiles (ACCEPT) (Cavagnolo+, 2009)J/ApJS/174/117 : Properties and metal abundances of clusters (Maughan+, 2008)ftp://space.mit.edu/pub/tamer/ebc2015/ : This article available datahttp://astro.uni-bonn.de/~reiprich/act/gcs/ : T.H. Reiprich HIFLUGCS home pagehttp://www.pa.msu.edu/astro/MC2/accept : Archive of Chandra Clusterhttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/805/3https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/805/3http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/805/3https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/805/3https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/805/3http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/805/3GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/805/3/clusters (Chandra observations, cluster masses, scales, best-fit parameters of the electron density and temperature radial profiles, morphological parameters and global metallicity measures (tables1, 6-10))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/805/3/clusters?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/805/3/clusters?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/805/3/clusters?GETtext/xml+votable180.050000true14.06413333-1.254938890.0055555555555555566/50 206 306 7004 8220 8268 8271 8520 9036 9354 9506 10312 10527 12121 15112 16434 16492 16543 18016 19608 20481 21766 23027 23451 24943 25981 26135 26189 26302 28430 30946 31537 32693 32798 33628 34443 39079 40615 40777 40809 43849 43977 45421 45543 45562 45984https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/805/3?format=asciiX-raydefaultJ/ApJ/805/3/clustersChandra observations, cluster masses, scales, best-fit parameters of the electron density and temperature radial profiles, morphological parameters and global metallicity measures (tables1, 6-10)e_Zin[0.005/0.08] Lower uncertainty in Zinstat.errorfloatS15Sources within 1' from Schellenberger+, 2015, J/A+A/575/A30meta.ref.urlintnullableSimbadSimbad column added by the CDSmeta.ref.urlcharNEDNED column added by the CDSmeta.ref.urlcharLabelLabel used to denote clustermeta.idcharObsIDChandra ObsID(s) used in this work (1)meta.id;obscharf_<w>[d] Incomplete coverage (5)meta.codecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDCluster identifiermeta.id;meta.maincharRAJ2000Cluster Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Cluster Degree of Declination (J2000)pos.eq.dec;meta.mainz[0.02/0.3] Cluster redshiftsrc.redshiftfloatTexp[8/437] Total exposure time for spectral analysiskstime.duration;obs.exposureintkT[2.1/23.4] X-ray temperature measured between 0.15 and 1*R500keVphys.temperaturefloatE_kT[0.01/2] Upper uncertainty in kxkeVstat.error;stat.maxfloate_kT[0.01/1] Lower uncertainty in kTkeVstat.error;phys.energyfloatR500[0.6/2.2] Radius enclosing 500 times critical density (2)Mpcphys.size.radiusfloatE_R500[0.004/0.07] Upper uncertainty in R500Mpcstat.error;stat.maxfloate_R500[0.002/0.10] Lower uncertainty in R500Mpcstat.errorfloatM500[0.9/35.1] Total gravitational mass within R5001e+14solMassphys.massfloatE_M500[0.03/4] Upper uncertainty in M5001e+14solMassstat.error;stat.maxfloate_M500[0.03/6] Lower uncertainty in M5001e+14solMassstat.errorfloatMgas[0.7/43.2] Gass mass within R5001e+13solMassphys.massfloatE_Mgas[0.03/2] Upper uncertainty in Mgas1e+13solMassstat.error;stat.maxfloate_Mgas[0.02/4] Lower uncertainty in Mgas1e+13solMassstat.errorfloatn0? Density profile normalization n_0_ (3)cm**-3stat.fit.paramdoublenullablealpha[0/5]? Best-fit {alpha} parameter (3)stat.fit.paramdoublenullablebeta[0.01/5]? Best-fit {beta} parameter (3)stat.fit.paramfloatnullablerc[0.001/27.3]? Best-fit r_c_ parameter (3)Mpcstat.fit.paramdoublenullablers[0.01/2.2]? Best-fit r_s_ parameter (3)Mpcstat.fit.paramdoublenullableeps[0.4/5]? Best-fit {epsilon} parameter (3)stat.fit.paramfloatnullablert[0.002/19.5]? Best-fit r_t_ parameter (4)Mpcstat.fit.paramdoublenullablea[-1.6/0.72]? Best-fit {alpha} parameter (4)stat.fit.paramdoublenullableb[-0.53/7.9]? Best-fit b parameter (4)stat.fit.paramdoublenullablec[-1.8/12]? Best-fit c parameter (4)stat.fit.param;meta.modelleddoublenullableacool[-1.9/13]? Best-fit {alpha}_cool_ parameter (4)stat.fit.paramfloatnullablercool[0.004/0.52]? Best-fit r_cool_ parameter (4)Mpcstat.fit.paramdoublenullableTmin[0.3/19.3]? Best-fit T_min_ parameter (4)keVstat.fit.paramfloatnullableT0[1.9/83.5]? Best-fit T_0_ parameter (4)keVstat.fit.paramfloatnullablecSB[1.8/29.3] Surface brightness concentrationphys.size;arith.ratiofloate_cSB[0.01/0.27] Uncertainty in cSBstat.errorfloatS40[40.5/550] Entropy at 40 kpc radiuskeV.cm**2stat.fit.paramfloatE_S40[0.2/69] Upper uncertainty in S40keV.cm**2stat.error;stat.maxfloate_S40[0.3/65] Lower uncertainty in S40keV.cm**2stat.errorfloat<w>[0.5/19] Median centroid shift (5)stat.stdevfloatZmid[0.1/0.5] Gas-mass-weighted metallicity (6)phys.abund.ZfloatE_Zmid[0.009/0.1] Upper uncertainty in Zmidstat.error;stat.maxfloate_Zmid[0.009/0.1] Lower uncertainty in Zmidstat.errorfloatZin[0.2/0.6] Bulk core cluster metallicity (7)phys.abund.ZfloatE_Zin[0.005/0.09] Upper uncertainty in Zinstat.error;stat.maxfloat