J/AJ/108/2087ivo://CDS.VizieR/J/AJ/108/2087doi:10.26093/cds/vizier.51082087CDSAjhar E.A.Blakeslee J.P.Tonry J.L.2023-04-06T16:50:08Z1997-12-09T20:20:15ZCDS support team

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

cds-question@unistra.frgalaxiesvisible-astronomyglobular-star-clustersphotometryWe present VRI photometry for the globular cluster systems (GCS's) of ten elliptical and S0 galaxies in Virgo and Leo. We find that the V-I color (metallicity) distributions are quite different from galaxy to galaxy. One extreme is represented by NGC 4374 with a narrow, blue distribution. NGC 4472 has a very broad, uniform distribution in color, corresponding to -1.8 < [Fe/H] < +0.47. At the other extreme is NGC 4365, which is weighted towards red colors, and possibly has a peculiar luminosity function. We suggest that this variation of GCS metallicity depends on environment, with formation of high metallicity globular clusters inhibited in higher density environments. We compare color-color plots of the GCS's of these galaxies with the Milky Way GCS and with integrated isochrones. We find good agreement with the galaxies studied here except that the isochrones predict colors which are slightly too bright in the I band for metal-rich clusters. We also consider the radial GC color distributions in these galaxies. We find evidence for a V-I color gradient only in NGC 4374, in the sense of redder clusters toward the center of the galaxy but warn that possible systematic effects must be ruled out with the new data. Lastly, using the surface brightness fluctuation distances to these galaxies, we find supporting evidence for the universality of the globular cluster luminosity function.1994AJ....108.2087Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/108/2087CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/108/2087https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/108/2087http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/108/2087https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/108/2087https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/108/2087http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/108/2087GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/AJ/108/2087/table3NGC 3379recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDIdentification numbermeta.id;meta.mainintXposX position relative to center of galaxyarcsecpos.projfloatYposY position relative to center of galaxyarcsecpos.projfloatDistRadial distancearcsecpos.angDistancefloatRmagR magnitudemagphot.mag;em.opt.RfloatV-RV-R colormagphot.color;em.opt.V;em.opt.RfloatR-IR-I colormagphot.color;em.opt.R;em.opt.IfloatJ/AJ/108/2087/table4NGC 4365recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDIdentification numbermeta.id;meta.mainintXposX position relative to center of galaxyarcsecpos.projfloatYposY position relative to center of galaxyarcsecpos.projfloatDistRadial distancearcsecpos.angDistancefloatRmagR magnitudemagphot.mag;em.opt.RfloatV-RV-R colormagphot.color;em.opt.V;em.opt.RfloatR-IR-I colormagphot.color;em.opt.R;em.opt.IfloatJ/AJ/108/2087/table5NGC 4374recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDIdentification numbermeta.id;meta.mainintXposX position relative to center of galaxyarcsecpos.projfloatYposY position relative to center of galaxyarcsecpos.projfloatDistRadial distancearcsecpos.angDistancefloatRmagR magnitudemagphot.mag;em.opt.RfloatV-RV-R colormagphot.color;em.opt.V;em.opt.RfloatR-IR-I colormagphot.color;em.opt.R;em.opt.IfloatJ/AJ/108/2087/table6NGC 4406recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDIdentification numbermeta.id;meta.mainintXposX position relative to center of galaxyarcsecpos.projfloatYposY position relative to center of galaxyarcsecpos.projfloatDistRadial distancearcsecpos.angDistancefloatRmagR magnitudemagphot.mag;em.opt.RfloatV-RV-R colormagphot.color;em.opt.V;em.opt.RfloatR-IR-I colormagphot.color;em.opt.R;em.opt.IfloatJ/AJ/108/2087/table7NGC 4458R-IR-I colormagphot.color;em.opt.R;em.opt.IfloatV-RV-R colormagphot.color;em.opt.V;em.opt.RfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDIdentification numbermeta.id;meta.mainintXposX position relative to center of galaxyarcsecpos.projfloatYposY position relative to center of galaxyarcsecpos.projfloatDistRadial distancearcsecpos.angDistancefloatRmagR magnitudemagphot.mag;em.opt.RfloatJ/AJ/108/2087/table8NGC 4468recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDIdentification numbermeta.id;meta.mainintXposX position relative to center of galaxyarcsecpos.projfloatYposY position relative to center of galaxyarcsecpos.projfloatDistRadial distancearcsecpos.angDistancefloatRmagR magnitudemagphot.mag;em.opt.RfloatV-RV-R colormagphot.color;em.opt.V;em.opt.RfloatR-IR-I colormagphot.color;em.opt.R;em.opt.IfloatJ/AJ/108/2087/table9NGC 4472recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDIdentification numbermeta.id;meta.mainintXposX position relative to center of galaxyarcsecpos.projfloatYposY position relative to center of galaxyarcsecpos.projfloatDistRadial distancearcsecpos.angDistancefloatRmagR magnitudemagphot.mag;em.opt.RfloatV-RV-R colormagphot.color;em.opt.V;em.opt.RfloatR-IR-I colormagphot.color;em.opt.R;em.opt.IfloatJ/AJ/108/2087/table10NGC 4489recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDIdentification numbermeta.id;meta.mainintXposX position relative to center of galaxyarcsecpos.projfloatYposY position relative to center of galaxyarcsecpos.projfloatDistRadial distancearcsecpos.angDistancefloatRmagR magnitudemagphot.mag;em.opt.RfloatV-RV-R colormagphot.color;em.opt.V;em.opt.RfloatR-IR-I colormagphot.color;em.opt.R;em.opt.IfloatJ/AJ/108/2087/table11NGC 4552IDIdentification numbermeta.id;meta.mainintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintXposX position relative to center of galaxyarcsecpos.projfloatYposY position relative to center of galaxyarcsecpos.projfloatDistRadial distancearcsecpos.angDistancefloatRmagR magnitudemagphot.mag;em.opt.RfloatV-RV-R colormagphot.color;em.opt.V;em.opt.RfloatR-IR-I colormagphot.color;em.opt.R;em.opt.IfloatJ/AJ/108/2087/table12NGC 4578recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDIdentification numbermeta.id;meta.mainintXposX position relative to center of galaxyarcsecpos.projfloatYposY position relative to center of galaxyarcsecpos.projfloatDistRadial distancearcsecpos.angDistancefloatRmagR magnitudemagphot.mag;em.opt.RfloatV-RV-R colormagphot.color;em.opt.V;em.opt.RfloatR-IR-I colormagphot.color;em.opt.R;em.opt.Ifloat