J/ApJ/682/135ivo://CDS.VizieR/J/ApJ/682/135doi:10.26093/cds/vizier.16820135CDSLee M.G.Park H.S.Kim E.Hwang H.S.Kim S.C.Geisler D.2018-01-30T07:18:08Z2010-11-23T13:24:18ZCDS support team

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

cds-question@unistra.frglobular-star-clustersccd-photometrygalaxiesvisible-astronomybroad-band-photometryWe present a photometric study of the globular clusters (GCs) in the giant elliptical galaxy M60 in the Virgo Cluster, based on deep, relatively wide field Washington CT_1_ CCD images. The CMD reveals a significant population of GCs in M60 and a large number of young luminous clusters in NGC 4647, a small companion spiral northwest of M60. The color distribution of the GCs in M60 is clearly bimodal, with a blue peak at (C-T_1_)=1.37 and a red peak at (C-T_1_)=1.87. We derive two new transformation relations between the (C-T_1_)_0_ color and [Fe/H] using the data for the GCs in our Galaxy and M49. Using these relations, we derive the metallicity distribution of the GCs in M60, which is also bimodal: a dominant metal-poor component with center at [Fe/H]=-1.2, and a weaker metal-rich component with center at [Fe/H]=-0.2. We estimate the total number of the GCs in M60 to be 3600+/-500 and the specific frequency to be S_N_=3.8+/-0.4.2008ApJ...682..135Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/682/135CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/674/857 : Radial velocities and CT1 magnitudes in M60 galaxy (Lee+,J/MNRAS/355/608 : NGC 4649 (M60) globular clusters (Forbes+, 2004)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/682/135https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/682/135http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/682/135https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/682/135https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/682/135http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/682/135GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/682/135/table3 (CT_1_ photometry of the measured point sources with {sigma}(C-T_1_)<0.3 in M60)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/682/135/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/682/135/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/682/135/table3?GETtext/xml+votable180.050000true190.8006288911.479573890.0055555555555555566/27907 279132.9196443747461696e-19 3.2860540898823595e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/682/135?format=asciiOpticaldefaultJ/ApJ/682/135/table3CT_1_ photometry of the measured point sources with {sigma}(C-T_1_)<0.3 in M60recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqSource ID number (<[LHP2008] NNNNN> in Simbad)meta.id;meta.mainintXpixThe X-coordinate on the chip (1)pixpos.cartesian.x;instr.detfloatYpixThe Y-coordinate on the chip (1)pixpos.cartesian.y;instr.detfloatRAJ2000Right Ascension (J2000) in decimal degreesdegpos.eq.ra;meta.mainDEJ2000Declination (J2000) in decimal degreesdegpos.eq.dec;meta.mainT1magThe T_1_ band magnitudemagphot.mag;em.opt.Rfloate_T1magError in T1magmagstat.error;phot.magfloatC-T1The (C-T_1_) color indexmagphot.color;em.opt.U;em.opt.Rfloate_C-T1Error in C-T1magstat.errorfloat