X-Ray Study of Temperature and Abundance Profiles of the Cluster of Galaxies Abell 1060 with Suzaku

[摘要] Wecarriedoutobservationsofthecentraland20$$'$$eastoffsetregionsoftheclusterofgalaxiesAbell1060withSuzaku.SpatiallyresolvedX-rayspectralanalysishasrevealedtemperatureandabundanceprofilesofAbell1060outto27$$'simeq380;h_{70}^{-1}$$kpc,whichcorrespondsto$$sim$$0.25$$r_{180}$$.Temperaturedecreaseoftheintra-clustermediumfrom3.4keVatthecenterto2.2keVintheoutskirtregionwasclearlyobserved.TheabundancesofSi,S,andFealsodecreasebymorethan50%fromthecentertotheouterregion,whileMgshowsafairlyconstantabundancedistributionat$$sim0.7$$solarwithin$$rlesssim17'$$.Oshowsalowerabundanceof$$sim0.3$$solarinthecentralregion($$rlesssim6'$$),andindicatesasimilarfeaturewithMg;however,itissensitivetotheestimatedcontributionoftheGalacticcomponentsof$$kT_1sim$$0.15keVand$$kT_2sim$$0.7keVintheouterannuli($$rgtrsim13'$$).Systematiceffectsduetothepoint-spreadfunctiontails,contaminationontheXISfilters,instrumentalbackground,cosmicand/orGalacticX-raybackground,andtheassumedsolarabundancetableswerecarefullyexamined.TheresultsonthetemperatureandabundancesofSi,S,andFeareconsistentwiththosederivedbyXMM-Newtonat$$rlesssim$$13$$'$$.Theformationandmetal-enrichmentprocessoftheclusterarediscussedbasedonthepresentresults.

[学科分类] 天文学(综合)

[关键词] "galaxies: clusters: individual (Abell 1060)";"X-rays: galaxies";"X-rays: ISM"