J/ApJ/829/108ivo://CDS.VizieR/J/ApJ/829/108doi:10.26093/cds/vizier.18290108CDSEadie G.M.Harris W.E.2018-01-05T08:55:30Z2017-01-19T07:15:18ZCDS support team

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

cds-question@unistra.frglobular-star-clustersmilky-way-galaxyproper-motionsWe present mass and mass profile estimates for the Milky Way (MW) Galaxy using the Bayesian analysis developed by Eadie et al. (2015ApJ...806...54E) and using globular clusters (GCs) as tracers of the Galactic potential. The dark matter and GCs are assumed to follow different spatial distributions; we assume power-law model profiles and use the model distribution functions described in Evans et al. (1997MNRAS.286..315E) and Deason et al. (2012MNRAS.424L..44D). We explore the relationships between assumptions about model parameters and how these assumptions affect mass profile estimates. We also explore how using subsamples of the GC population beyond certain radii affect mass estimates. After exploring the posterior distributions of different parameter assumption scenarios, we conclude that a conservative estimate of the Galaxy's mass within 125kpc is 5.22x10^11^M_{sun}_, with a 50% probability region of (4.79,5.63)x10^11^M_{sun}_. Extrapolating out to the virial radius, we obtain a virial mass for the MW of 6.82x10^11^M_{sun}_ with 50% credible region of (6.06,7.53)x10^11^M_{sun}_ (r_vir_=185_-7_^+7^kpc). If we consider only the GCs beyond 10 kpc, then the virial mass is 9.02(5.69,10.86)x10^11^M_{sun}_ (r_vir_=198_-24_^+19^kpc). We also arrive at an estimate of the velocity anisotropy parameter {beta} of the GC population, which is {beta}=0.28 with a 50% credible region (0.21, 0.35). Interestingly, the mass estimates are sensitive to both the dark matter halo potential and visible matter tracer parameters, but are not very sensitive to the anisotropy parameter.2016ApJ...829..108Ehttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/829/108CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/202 : Globular Clusters in the Milky Way (Harris, 1997)J/MNRAS/450/2692 : Param. of galactic globular clusters (Vanderbeke+, 2015)J/A+A/562/A134 : Tracers of the Milky Way mass (Bratek+, 2014)J/ApJ/684/1143 : BHB candidates in the Milky Way (Xue+, 2008)J/A+A/450/105 : Properties of 153 Galactic globular clusters (Bica+, 2006)J/A+A/397/899 : Proper motions of field HB stars (Sakamoto+, 2003)J/A+A/385/67 : HST VI phot. & proper motions in NGC 6528 (Feltzing+, 2002)http://www.astro.yale.edu/dana/gc.html : Globular clusters compilationhttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/829/108https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/829/108http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/829/108https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/829/108https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/829/108http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/829/108GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/829/108/table1 (*Kinematic data of Galactic globular clusters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/829/108/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/829/108/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/829/108/table1?GETtext/xml+votable180.050000true6.0223292-72.08144440.0055555555555555566/1133 3950 4843 6389 9436 9666 10008 10321 10336 12405 12425 12531 12943 14489 16647 16775 17121 17711 19091 20001 21017 24843 25873 27237 27852 27981 27986 28067 28577 28705 28717 28741 28751 28768 28769 28778 28781 28805 28808 28815 28817 28833 28835 28838 28855 28867 28868 28876 28877 28882 28889 28895 28903 28905 28959 28962 28970 28973 28974 29077 29090 29097 29113 29184 29187 29195 29202 29216 29222 29231 29233 29248 29267 29289 29294 29318 29377 29626 29632 29636 29637 29816 29870 30269 30321 30323 30378 30769 30998 31019 31043 31095 31115 31128 31398 31417 31723 32083 33321 33330 33635 34242 34317 36971 37294 38465 39642 39954 41011 41257 41304 41507 41522 41847 41852 42076 42152 42204 42278 42314 42320 42361 42466 42528 42700 42761 42789 42841 42862 42955 42958 42990 43125 43193 43227 43894 44086 44220 44427 47125 47620 47745 47777 47825 47866 47868 47903 47916 47935 47971 48035 48434 48444 48698 48952https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/829/108?format=asciidefaultJ/ApJ/829/108/table1*Kinematic data of Galactic globular clustersSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDMilky Way globular cluster identifiermeta.id;meta.maincharRgc[0.5/125] Harris catalog Galactocentric distancekpcmeta.idfloatpmRA[-12.7/7.4]? Proper motion along Right Ascension times cos(DE)mas/yrpos.pm;pos.eq.rafloatnullablee_pmRA[0.03/2]? Uncertainty in pmRA*cosDEmas/yrstat.error;pos.pm;pos.eq.rafloatnullablepmDE[-19.4/5.4]? Proper motion along Declinationmas/yrpos.pm;pos.eq.decdoublenullablee_pmDE[0.03/1.8]? Uncertainty in pmDEmas/yrstat.error;pos.pm;pos.eq.decfloatnullableVLOS[-411.4/494]? Harris catalog Heliocentric line-of-sight velocitykm/sphys.veloc;pos.heliocentricfloatnullablee_VLOS[0.1/57]? Uncertainty in VLOSkm/sstat.errorfloatnullablecos(xi)[-1/1] Cosine of angle subtended by Sun, GC, and Galactic centerpos.posAngfloatRefProper motion reference (1)meta.ref;pos.pm;pos.framecharIncl?Included in sample; x=Yesmeta.codecharn_Incl?Notemeta.noteH97Display data from Harris, 1997, VII/202meta.ref.urlintnullableNEDSimbad 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