J/ApJ/483/826ivo://CDS.VizieR/J/ApJ/483/826doi:10.26093/cds/vizier.14830826CDSPhelps R.L.1998-03-15T14:46:36Z1998-03-15T15:46:26ZCDS support team

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

cds-question@unistra.fropen-star-clustersccd-photometryFaint magnitude BVI CCD photometry of the central region of the old open cluster Berkeley 17 (Be 17) has been undertaken to investigate the claim that it is the oldest open cluster yet discovered (Phelps, Janes, & Montgomery, 1994AJ....107.1079P). This study reveals Be 17 to have a metallicity -0.30<=[Fe/H]<=0.00; a reddening 0.52<=E(B-V)<=0.68 or 0.61<=E(V-I)<=0.71; a distance modulus, (m-M)_0_=12.15+/-0.10, corresponding to a distance of 2.7+/-0.1kpc; a diameter of ~10pc; a minimum mass of 400 Msun; and an age of 10-13Gyr. With an adopted age of 12(+1)(-2)Gyr, these results suggest that Be 17 is indeed the oldest open cluster yet discovered. The inferred old age for Be 17 indicates that the cluster is an important one for studies of the differences between open and globular clusters, the transition from the halo/thick disk to the thin disk of the Galaxy, and even for establishing the minimum age of the universe.1997ApJ...483..826Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/483/826CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/483/826https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/483/826http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/483/826https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/483/826https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/483/826http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/483/826GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/ApJ/483/826/fig1aV, B-V color-magnitude diagram data for Be 17IDIdentification numbermeta.id;meta.mainintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintXposX coordinate (1)pixpos.cartesian.x;instr.detfloatYposY coordinate (1)pixpos.cartesian.y;instr.detfloatVmagV magnitudemagphot.mag;em.opt.VfloatB-VB-V colormagphot.color;em.opt.B;em.opt.Vfloate_VmagError in Vmagmagstat.errorfloate_B-VError in B-Vmagstat.errorfloatJ/ApJ/483/826/fig1bV, V-I color-magnitude diagram data for Be 17recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDIdentification numbermeta.id;meta.mainintXposX coordinate (1)pixpos.cartesian.x;instr.detfloatYposY coordinate (1)pixpos.cartesian.y;instr.detfloatVmagV magnitudemagphot.mag;em.opt.VfloatV-IV-I colormagphot.color;em.opt.V;em.opt.Ifloate_VmagError in Vmagmagstat.errorfloate_V-IError in V-Imagstat.errorfloatJ/ApJ/483/826/fig2V, V-I color magnitude diagram data for the Be 17 off-cluster control fieldrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDIdentification numbermeta.id;meta.mainintXposX coordinate (1)pixpos.cartesian.x;instr.detfloatYposY coordinate (1)pixpos.cartesian.y;instr.detfloatVmagV magnitudemagphot.mag;em.opt.VfloatV-IV-I colormagphot.color;em.opt.V;em.opt.Ifloate_VmagError in Vmagmagstat.errorfloate_V-IError in V-Imagstat.errorfloat