J/ApJ/602/264ivo://CDS.VizieR/J/ApJ/602/264doi:10.26093/cds/vizier.16020264CDSMcNamara B.J.Harrison T.E.Baumgardt H.2014-11-12T14:43:34Z2005-12-28T16:13:06ZCDS support team

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

cds-question@unistra.frglobular-star-clustersproper-motionsradial-velocityNewly determined high-precision relative proper motions determined from the Hubble Space Telescope Wide Field Planetary Camera 2 are used along with radial velocity measurements to determine the dynamical distance to the globular cluster M15. A comparison of the proper motion and radial velocity dispersions from a sample of 237 stars, located at an average radial distance of about 10" from the cluster center, yields a cluster distance of 9.98+/-0.47kpc. This distance agrees to within the stated errors to other distance estimates but places this object about 5% closer than the currently adopted value of 10.4kpc. Using this new distance, we estimate that RR Lyrae stars having [Fe/H]=-2.15 have a value of Mv(RR)=0.51+/-0.11. We also estimate that M15 has an age of about 13.2Gyr, which places it among the oldest of the Galactic globular clusters. From a comparison of the observed velocity dispersion with results from recent N-body calculations, we derive a total cluster mass for M15 of M_C_=4.5x10^5^M_{sun}_.2004ApJ...602..264Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/602/264CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+AS/119/307 : Position in M15 (Le Campion+, 1996)J/AJ/106/154 : HST Observations in inner region of M15 (Ferraro+ 1993)J/AJ/107/1745 : HST UVI photometry of M15. II. (Yanny+, 1994)J/AJ/110/704 : RR Lyrae Variables in M15 (Silbermann+ 1995)J/AJ/115/708 : Radial Velocities in the Field of M15 (Drukier+ 1998)J/AJ/119/1268 : CFHT adaptive optics observations of M15 (Gebhardt+, 2000)J/AJ/124/3255 : UBV photometry in M15 (van der Marel+, 2002)J/ApJ/595/187 : Proper motions in M15 (McNamara+, 2003)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/602/264https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/602/264http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/602/264https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/602/264https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/602/264http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/602/264GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/602/264/table1 (Proper motion and radial velocity data)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/602/264/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/602/264/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/602/264/table1?GETtext/xml+votable180.050000true322.493028912.17184580.0055555555555555566/12405https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/602/264?format=asciiOpticaldefaultJ/ApJ/602/264/table1Proper motion and radial velocity datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintXposX pixel location (1)pixpos.cartesian.xfloatYposY pixel location (1)pixpos.cartesian.yfloatpmXProper motion in X direction10mas/yrpos.pm;pos.dirCosfloatpmYProper motion in Y direction10mas/yrpos.pm;pos.dirCosfloate_pmXX proper motion error10mas/yrstat.errorfloate_pmYY proper motion error10mas/yrstat.errorfloatVGGID given in Gebhardt et al. (2000, Cat. <J/AJ/119/1268>), Cl* NGC 7078 VGG NNNNNmeta.idintRVRadial velocity in Gebhardt et al. (2000, Cat. <J/AJ/119/1268>)km/sphys.veloc;pos.heliocentricfloate_RVError in RVkm/sstat.errorfloat_RAPositions (as computed from van der Marel et al., J/AJ/124/3255 (right ascension part)degpos.eq.ra;meta.main_DEPositions (as computed from van der Marel et al., J/AJ/124/3255 (declination part)degpos.eq.dec;meta.main