J/ApJ/703/42ivo://CDS.VizieR/J/ApJ/703/42doi:10.26093/cds/vizier.17030042CDSPeng E.W.Jordan A.Blakeslee J.P.Mieske S.Cote P.Ferrarese L.,Harris W.E.Madrid J.P.Meurer G.R.2017-10-12T12:59:39Z2011-11-09T13:44:54ZCDS support team

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

cds-question@unistra.frglobular-star-clustersinfrared-photometryvisible-astronomyphotometryhst-photometrygalaxiesWe present a study of the M87 GC system using deep, archival HST/ACS imaging with the F606W and F814W filters, in which we find a significant color-magnitude relation for the metal-poor globular clusters (GCs). The slope of this relation in the I versus V-I color-magnitude diagram ({gamma}_I_=-0.024+/-0.006) is perfectly consistent with expectations based on previously published results using data from the ACS Virgo Cluster Survey. We show that previously measured half-light radii of M87 GCs from best-fit PSF-convolved King models are consistent with the more accurate measurements in this study, and we also explain how the color-magnitude relation for metal-poor GCs is real and cannot be an artifact of the photometry. We fit Gaussian and evolved Schechter functions to the luminosity distribution of GCs across all colors, as well as divided into blue and red subpopulations, finding that the blue GCs have a brighter mean luminosity and a narrower distribution than the red GCs. Finally, we present a catalog of astrometry and photometry for 2250 M87 GCs.2009ApJ...703...42Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/703/42CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/hst : HST Archived Exposures Catalog (STScI, 2007)J/ApJ/671/1624 : NGC 1533 globular cluster candidates (Degraaff+, 2007)J/AJ/131/866 : Hot populations in M87 globular clusters (Sohn+, 2006)J/ApJ/613/279 : ACS Virgo Cluster Survey. III. M87 (Jordan+, 2004)J/ApJ/559/812 : Globular cluster system in M87 (Hanes+, 2001)J/ApJ/513/733 : Globular cluster system in M87 (Kundu+, 1999)J/AJ/115/1801 : VRI photometry of M87 globular clusters (Harris+ 1998)J/AJ/106/493 : Globular clusters in M87 (Lee+, 1993)J/ApJS/73/671 : M87 globular clusters BVI photometry (Couture+, 1990)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/703/42https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/703/42http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/703/42https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/703/42https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/703/42http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/703/42GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/703/42/table1 (Positions and KINGPHOT photometry for M87 GCs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/703/42/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/703/42/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/703/42/table1?GETtext/xml+votable180.050000true187.7432502812.405200280.0055555555555555566/277652.367228618189496e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/703/42?format=asciiOpticalInfrareddefaultJ/ApJ/703/42/table1Positions and KINGPHOT photometry for M87 GCsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[PJB2009]Running identification numbermeta.id;meta.mainintRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainVmagConverted V band magnitude (Vega) (1)magphot.mag;em.opt.Vfloate_VmagThe 1{sigma} uncertainty in Vmagmagstat.error;phot.mag;em.opt.VfloatImagConverted I band magnitude (Vega) (1)magphot.mag;em.opt.Ifloate_ImagThe 1{sigma} uncertainty in Imagmagstat.error;phot.mag;em.opt.IfloatNEDSimbad column added by the CDSchar