J/ApJ/812/149ivo://CDS.VizieR/J/ApJ/812/149doi:10.26093/cds/vizier.18120149CDSWatkins L.L.van der Marel R.P.Bellini A.Anderson J.2017-11-28T13:21:07Z2016-03-04T11:37:44ZCDS support team

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

cds-question@unistra.frglobular-star-clustersgalaxy-kinematicsstellar-distancestellar-massesWe present dynamical distance estimates for 15 Galactic globular clusters (GCs) and use these to check the consistency of dynamical and photometric distance estimates. For most of the clusters, this is the first dynamical distance estimate ever determined. We extract proper-motion (PM) dispersion profiles using cleaned samples of bright stars from the Hubble Space Telescope PM catalogs recently presented in Bellini et al. (Paper I, 2014, J/ApJ/797/115) and compile a set of line of sight (LOS) velocity-dispersion profiles from a variety of literature sources. Distances are then estimated by fitting spherical, non-rotating, isotropic, constant mass-to-light ratio (M/L) dynamical models to the PM and LOS dispersion profiles together. We compare our dynamical distance estimates with literature photometric estimates from the Harris GC catalog (VII/202) and find that the mean fractional difference between the two types is consistent with zero at just -1.9+/-1.7%. This indicates that there are no significant biases in either estimation method and provides an important validation of the stellar-evolution theory that underlies photometric distance estimates. The analysis also estimates dynamical M/Ls for our clusters; on average, the dynamically inferred M/Ls agree with existing stellar-population-based M/Ls that assume a Chabrier initial mass function (IMF) to within -8.8+/-6.4%, implying that such an IMF is consistent with our data. Our results are also consistent with a Kroupa IMF, but strongly rule out a Salpeter IMF. We detect no correlation between our M/L offsets from literature values and our distance offsets from literature values, strongly indicating that our methods are reliable and our results are robust.2015ApJ...812..149Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/812/149CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/202 : Globular Clusters in the Milky Way (Harris, 1997)J/ApJ/803/29 : HSTPROMO catalogs. II. Kinematic profiles (Watkins+, 2015)J/AJ/149/53 : RVs of 12 Milky Way globular clusters (Kimmig+, 2015)J/ApJ/798/23 : Radial velocities of giant stars in NGC 6388 (Lapenna+, 2015)J/A+A/573/A115 : Radial velocities in seven globular clusters (Lardo+, 2015)J/ApJ/797/115 : HSTPROMO I. Observations and NGC7078 results (Bellini+, 2014)J/A+A/566/A58 : Radial velocities in M3, M13, and M92 (Kamann+, 2014)J/ApJ/769/107 : RVs and [Fe/H] of star members of NGC 6388 (Lanzoni+, 2013)J/A+A/552/A49 : ARGUS images of 6 Galactic GCs (Lutzgendorf+, 2013)J/AcA/62/357 : Proper motions in 6 globular clusters (Zloczewski+, 2012)J/ApJ/754/91 : Abundances and velocities of NGC 6397 stars (Lovisi+, 2012)J/A+A/542/A129 : NGC 2808 central kinematics (Luetzgendorf+, 2012)J/A+A/533/A69 : Spectroscopy of 124 RGB stars in NGC 1851 (Carretta+, 2011)J/A+A/533/A36 : VI photometry & velocity map of NGC 6388 (Luetzgendorf+, 2011)J/MNRAS/414/888 : ATLAS3D project. III. (Emsellem+, 2011)J/A+A/525/A148 : Radial velocities in two globular clusters (Scarpa+, 2011)J/A+A/520/A95 : Abundances of red giants in M54 and Sgr dSph (Carretta+, 2010)J/ApJ/710/1032 : Proper motions in {omega} Cen (Anderson+, 2010)J/MNRAS/398/1757 : RR Lyraes in SDSS stripe 82 (Watkins+, 2009)J/MNRAS/396/2183 : RVs of red giants in {omega} Cen (Sollima+ 2009)J/AJ/137/4282 : Red giant stars in clusters. II. M13 and M92 (Meszaros+, 2009)J/AJ/133/1041 : Velocities & CMT2 photometry in globular M92 (Drukier+, 2007)J/A+A/464/927 : Abundances of red giants in NGC 6752 (Carretta+, 2007)J/ApJS/166/249 : Stellar dynamics & proper motions in 47Tuc (McLaughlin+, 2006)J/ApJS/161/304 : Star clusters in Milky Way and satellites (McLaughlin+, 2005)J/ApJ/602/264 : Proper motions and radial velocities in M15 (McNamara+, 2004)J/ApJ/595/187 : Proper motions in M15 (McNamara+, 2003)J/AJ/115/708 : Radial Velocities in the Field of M15 (Drukier+ 1998)J/AJ/110/1699 : F-P observations of globular clusters (Gebhardt+ 1995)J/AJ/109/218 : Catalogue of globular cluster profiles (Trager+ 1995)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/812/149https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/812/149http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/812/149https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/812/149https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/812/149http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/812/149GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/812/149/table2 (Results: distance and mass-to-light ratio estimates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/812/149/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/812/149/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/812/149/table2?GETtext/xml+votable180.050000true6.0223292-72.08144440.0055555555555555566/9666 12405 16647 28973 31417 33321 34242 37294 41852 42076 42314 42841 43227 47125 48035https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/812/149?format=asciidefaultJ/ApJ/812/149/table4Compilation of literature dispersion profilesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNGCGlobular Cluster Namemeta.id;meta.mainintRad[0.4/2904] Radiusarcsecphys.angSize;srcdoublee_Rad[0/164.2] Uncertainty in Radarcsecstat.errorfloatsigma[0.2/25.7] Velocity dispersion (1)km/sphys.veloc.dispersionfloatE_sigma[0.1/4.6] Upper uncertainty in sigma (1)km/sstat.error;stat.maxfloate_sigma[0.06/3.8] Lower uncertainty in sigma (1)km/sstat.errorfloatTypeVelocity dispersion data type (2)meta.notecharRefText of bibliographic data source referencemeta.bibcharBibCodeBibcode of data source referencemeta.bib.bibcodecharJ/ApJ/812/149/table2Results: distance and mass-to-light ratio estimatesNGCGlobular Cluster Namemeta.id;meta.mainintprimaryH97Display data from Harris, 1997, VII/202meta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintONameOther namesmeta.idcharNdist[517/16519] Number of PM stars used for the distance estimationmeta.numberintfpar[2.3/6.7] f parameter used in fitting procedure (f=(D{gamma})^0.5^; eq. 6)(kpc.solMass/solLum)0.5stat.fit.paramfloate_fparLower 1{sigma} uncertainty in fpar(kpc.solMass/solLum)0.5stat.errorfloatE_fpar[0.05/0.4] Upper 1{sigma} uncertainty in fpar(kpc.solMass/solLum)0.5stat.error;stat.maxfloatgpar[0.2/1] g parameter used in fitting procedure (g=({gamma}/D)^0.5^; eq. 8)(solMass/solLum/kpc)0.5stat.fit.paramfloate_gparLower 1{sigma} uncertainty in gpar(solMass/solLum/kpc)0.5stat.errorfloatE_gparUpper 1{sigma} uncertainty in gpar(solMass/solLum/kpc)0.5stat.error;stat.maxfloatDist[2.3/22.6] Heliocentric distance estimatekpcpos.distancefloate_Dist[0.08/0.9] Lower 1{sigma} uncertainty in Distkpcstat.errorfloatE_DistUpper 1{sigma} uncertainty in Distkpcstat.error;stat.maxfloatM/L[1.4/2.7] V-band mass-to-light ratio estimatesolMass/solLumphys.composition.massLightRatiofloate_M/LLower 1{sigma} uncertainty in M/LsolMass/solLumstat.errorfloatE_M/LUpper 1{sigma} uncertainty in M/LsolMass/solLumstat.error;stat.maxfloatMcl[0.7/34.6] Total cluster mass estimate100000solMassphys.massfloate_MclLower 1{sigma} uncertainty in Mclus100000solMassstat.errorfloatE_MclUpper 1{sigma} uncertainty in Mclus100000solMassstat.error;stat.maxfloatDistl[2.3/26.5] Literature heliocentric distance (1)kpcpos.distancefloatM/L-l[1.8/3] Literature V-band mass-to-light ratio (2)solMass/solLumphys.composition.massLightRatiofloatNpNumber of profile measures for this GC (link to table 4)meta.ref.urlintnullablepPapDisplay data from Paper I (Bellini et al. 2014, Cat. J/ApJ/797/115) and Paper II (Watkins+, 2015, J/ApJ/803/29)meta.ref.urlcharProfRadial velocity-dispersion profilesmeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlcharNEDSimbad column added by the CDSmeta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main