J/AJ/147/150ivo://CDS.VizieR/J/AJ/147/150doi:10.26093/cds/vizier.51470150CDSDowell J.L.Rhode K.L.Bridges T.J.Zepf S.E.Gebhardt K.Freeman K.C.,de Boer E.W.2014-11-22T11:31:54Z2014-11-05T13:54:44ZCDS support team

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

cds-question@unistra.frgalaxiesglobular-star-clustersspectroscopyradial-velocityinfrared-photometryvisible-astronomybroad-band-photometryWe have obtained radial velocity measurements for 51 new globular clusters around the Sombrero galaxy. These measurements were obtained using spectroscopic observations from the AAOmega spectrograph on the Anglo-Australian Telescope and the Hydra spectrograph at WIYN. Combining our own past measurements and velocity measurements obtained from the literature, we have constructed a large database of radial velocities that contains a total of 360 confirmed globular clusters. Previous studies' analyses of the kinematics and mass profile of the Sombrero globular cluster system have been constrained to the inner ~9' (~24kpc or ~5R_e_), but our new measurements have increased the radial coverage of the data, allowing us to determine the kinematic properties of M104 out to ~15' (~41kpc or ~9R_e_). We use our set of radial velocities to study the GC system kinematics and to determine the mass profile and V-band mass-to-light profile of the galaxy. We find that M/L_V_ increases from 4.5 at the center to a value of 20.9 at 41kpc (~9R_e_ or 15'), which implies that the dark matter halo extends to the edge of our available data set. We compare our mass profile at 20kpc (~4R_e_or ~7.4') to the mass computed from X-ray data and find good agreement. We also use our data to look for rotation in the globular cluster system as a whole, as well as in the red and blue subpopulations. We find no evidence for significant rotation in any of these samples.2014AJ....147..150Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/147/150CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/401/1965 : Globular clusters in M104 (Harris+, 2010)J/MNRAS/376/960 : X-ray emission from the Sombrero galaxy (Li+, 2007)J/ApJ/658/980 : New velocities for 62 M104 globular clustersJ/AJ/132/1593 : BVR photometry of NGC 4594 globular clustersJ/MNRAS/327/1116 : VI photometry of Sombrero globular clusters (Larsen+, 2001)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/147/150https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/147/150http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/147/150https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/147/150https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/147/150http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/147/150GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/147/150/table1 (Properties of the target objects with measured velocities)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/147/150/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/147/150/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/147/150/table1?GETtext/xml+votable180.050000true190.1713333-11.51388610.0055555555555555566/25081 25083https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/147/150?format=asciiOpticalInfrareddefaultJ/AJ/147/150/table1Properties of the target objects with measured velocitiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintr_NameReference on Name (1)meta.ref;pos.framecharNameIdentifier of the globular clustermeta.id;meta.mainintRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainVmag? The V band magnitude (2)magphot.mag;em.opt.VfloatnullableB-V? The (B-V) color index (2)magphot.color;em.opt.B;em.opt.VfloatnullableB-R? The (B-R) color index (2)magphot.color;em.opt.B;em.opt.RfloatnullableoRA[-17/19] Right Ascension offset from M104 centerarcminpos.eq.ra;arith.difffloatoDE[-18/19] Declination offset from M104 centerarcminpos.eq.dec;arith.difffloatRad[0.37/25.15] Angular radius from M104 centerarcminpos;arith.difffloatPA[0/360] Position angle of the globular clusterdegpos.posAngfloatHRV[-233/10434] Heliocentric radial velocitykm/sspect.dopplerVeloc;pos.heliocentricfloate_HRV[4.8/203] Uncertainty in HRVkm/sstat.error;spect.dopplerVeloc;pos.heliocentricfloat