J/ApJ/521/577ivo://CDS.VizieR/J/ApJ/521/577doi:10.26093/cds/vizier.15210577CDSHodge P.W.Dolphin A.E.Smith T.R. Mateo M.2000-03-13T12:24:31Z2000-03-13T13:24:28ZCDS support team

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

cds-question@unistra.frmetallicityglobular-star-clusterstwo-color-diagramsgalaxiesWe have obtained V and I images of the lone globular cluster that belongs to the dwarf Local Group irregular galaxy known as WLM. The color-magnitude diagram of the cluster shows that it is a normal old globular cluster with a well-defined giant branch reaching to M_V_=-2.5, a horizontal branch at M_V_=+0.5, and a subgiant branch extending to our photometry limit of M_V_=+2.0. A best fit to theoretical isochrones indicates that this cluster has a metallicity of [Fe/H]=-1.52{+/-}0.08 and an age of 14.8{+/-}0.6 Gyr, thus indicating that it is similar to normal old halo globulars in our Galaxy. From the fit we also find that the distance modulus of the cluster is 24.73{+/-}0.07 and the extinction is A_V_=0.07{+/-}0.06, both values that agree within the errors with data obtained for the galaxy itself by others.1999ApJ...521..577Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/521/577CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/521/577https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/521/577http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/521/577https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/521/577https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/521/577http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/521/577GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapHSTOpticaldefaultJ/ApJ/521/577/table1V and I photometry of the WLM globular clusterrecnoRecord number assigned by the VizieR team. Should Not be used for identification.intXposX coordinate on the chippixfloatYposY coordinate on the chippixfloatVmagV band magnitudemagfloate_Vmaguncertainty in VmagmagfloatImagI band magnitudemagfloate_Imaguncertainty in ImagmagfloatV-IV-I colormagfloate_V-Iuncertainty in the V-I colormagfloat