J/ApJ/681/1254ivo://CDS.VizieR/J/ApJ/681/1254doi:10.26093/cds/vizier.16811254CDSZhu Q.Kudritzki R.P.Figer D.F.Najarro F.Merritt D.2018-01-05T08:56:49Z2010-11-23T14:46:18ZCDS support team

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

cds-question@unistra.frlate-type-starsradial-velocitystellar-spectral-typesspectroscopyearly-type-starsline-intensitiesWe present results from K-band slit scan observations of a ~20"x20" region of the Galactic center (GC) in two separate epochs more than 5 years apart. The high-resolution (R={lamda}/{Delta}{lambda}>=14000) observations allow the most accurate radial velocity and acceleration measurements of the stars in the central parsec of the Galaxy. Detected stars can be divided into three groups based on the CO absorption band heads at ~2.2935um and the HeII lines at ~2.0581 and ~2.112, 2.113um: cool, narrow-line hot, and broad-line hot. The radial velocities of the cool, late-type stars have approximately a symmetrical distribution with its center at ~-7.8+/-10.3km/s and a standard deviation ~113.7+/-10.3km/s. Although our statistics are dominated by the brightest stars, we estimate a central black hole mass of (3.9+/-1.1)x10^6^M_{sun}_, consistent with current estimates from complete orbits of individual stars. Our surface density profile and the velocity dispersion of the late-type stars support the existence of a low-density region at the Galactic center suggested by earlier observations.2008ApJ...681.1254Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/681/1254CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/499/483 : NIR observations of sources in galactic center (Buchholz+,J/ApJ/670/1115 : IRS spectra at 38 positions in Galactic center (Simpson+,J/A+A/426/81 : Kinematic analysis of the Minispiral (Paumard+, 2004)J/ApJ/597/323 : Cool stars at the Galactic Center (Blum+, 2003)J/ApJ/523/248 : Variable stars in the Galactic center (Ott+, 1999)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/681/1254https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/681/1254http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/681/1254https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/681/1254https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/681/1254http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/681/1254GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/681/1254/table3 (Cool star velocity)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/681/1254/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/681/1254/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/681/1254/table3?GETtext/xml+votable180.050000true266.4164167-29.00750.005555555555555556Cone search capability for table J/ApJ/681/1254/HeI (Radial velocities of narrow and broad HeI line stars (tables 5 and 6 of paper))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/681/1254/HeI?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/681/1254/HeI?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/681/1254/HeI?GETtext/xml+votable180.050000true266.416875-29.00752780.0055555555555555566/28830https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/681/1254?format=asciiOpticaldefaultJ/ApJ/681/1254/table3Cool star velocityrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSource identification (1)meta.id;meta.maincharoRARight ascension offset from Sagittarius A*arcsecpos.eq.ra;arith.difffloatoDEDeclination offset from Sagittarius A*arcsecpos.eq.dec;arith.difffloatRV99? Radial velocity; epoch 1999 (2)km/sphys.veloc;pos.heliocentricfloatnullablee_RV99? RV99 uncertaintykm/sstat.errorfloatnullableRV05? Radial velocity; epoch 2005 (2)km/sphys.veloc;pos.heliocentricfloatnullablee_RV05? RV05 uncertaintykm/sstat.errorfloatnullable<RV>Mean radial velocitykm/sspect.dopplerVeloc;stat.meanfloate_<RV><RV> uncertaintykm/sstat.errorfloatTeffEffective temperature (3)Kphys.temperature.effectiveintl_SpTLimit flag on SpTypemeta.code.errorcharSpTMK spectral type (3)src.spTypecharRVf? Radial velocity from Figer et al. (2003ApJ...599.1139F) (4)km/sphys.veloc;pos.heliocentricfloatnullablee_RVf? RVFig uncertainty (4)km/sstat.errorfloatnullableSimbadNameSimbad column added by the CDSmeta.idchar_RAPositions calculated from offsets with center = SgrA* at 14:45:40.04-29:00:28.11 (right ascension part)degpos.eq.ra;meta.main_DEPositions calculated from offsets with center = SgrA* at 14:45:40.04-29:00:28.11 (declination part)degpos.eq.dec;meta.mainJ/ApJ/681/1254/HeIRadial velocities of narrow and broad HeI line stars (tables 5 and 6 of paper)NameStar designationmeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSSimbad column added by the CDSmeta.codecharr_Name[ab] Name reference (1)meta.ref;pos.framecharoRARight ascension offset from Sagittarius A*arcsecpos.eq.ra;arith.difffloatoDEDeclination offset from Sagittarius A*arcsecpos.eq.dec;arith.difffloatRV1? Radial velocity 1 (2)km/sphys.veloc;pos.heliocentricfloatnullablee_RV1? RV1 uncertaintykm/sstat.errorfloatnullableRV2? Radial velocity 2 (2)km/sphys.veloc;pos.heliocentricfloatnullablee_RV2? RV2 uncertaintykm/sstat.errorfloatnullableRV3? Radial velocity 3 (2)km/sphys.veloc;pos.heliocentricfloatnullablee_RV3? RV3 uncertaintykm/sstat.errorfloatnullableRV4? Radial velocity 4 (2)km/sphys.veloc;pos.heliocentricfloatnullablee_RV4? RV4 uncertaintykm/sstat.errorfloatnullable<RV>Mean radial velocitykm/sspect.dopplerVeloc;stat.meanfloate_<RV><RV> uncertaintykm/sstat.errorfloatDRV? Radial velocity difference between 1999 and 2005km/sphys.veloc;arith.difffloatnullablee_DRV? DRV uncertaintykm/sstat.errorfloatnullableEWEquivalent width (3)0.1nmspect.line.eqWidthfloatRefPrevious reference(s) (4)meta.ref;pos.framecharSimbadNameSimbad column added by the CDSmeta.idchar_RAPositions calculated from offsets with center = SgrA* at 14:45:40.04-29:00:28.11 (right ascension part)degpos.eq.ra;meta.main_DEPositions calculated from offsets with center = SgrA* at 14:45:40.04-29:00:28.11 (declination part)degpos.eq.dec;meta.main