J/ApJ/769/107ivo://CDS.VizieR/J/ApJ/769/107doi:10.26093/cds/vizier.17690107CDSLanzoni B.Mucciarelli A.Origlia L.Bellazzini M.Ferraro F.R.,Valenti E.Miocchi P.Dalessandro E.Pallanca C.Massari D.2017-12-05T05:09:36Z2015-01-16T10:47:52ZCDS support team

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

cds-question@unistra.frmetallicityradial-velocityhst-photometryglobular-star-clustersBy combining high spatial resolution and wide-field spectroscopy performed, respectively, with SINFONI and FLAMES at the ESO/VLT we measured the radial velocities of more than 600 stars in the direction of NGC 6388, a Galactic globular cluster which is suspected to host an intermediate-mass black hole. Approximately 55% of the observed targets turned out to be cluster members. The cluster velocity dispersion has been derived from the radial velocity of individual stars: 52 measurements in the innermost 2", and 276 stars located between 18" and 600". The velocity dispersion profile shows a central value of ~13km/s, a flat behavior out to ~60" and a decreasing trend outward. The comparison with spherical and isotropic models shows that the observed density and velocity dispersion profiles are inconsistent with the presence of a central black hole more massive than ~2000M_{sun}_. These findings are at odds with recent results obtained from integrated light spectra, showing a velocity dispersion profile with a steep central cusp of 23-25km/s at r<2" and suggesting the presence of a black hole with a mass of ~1.7x10^4^M_{sun}_. We also found some evidence of systemic rotation with amplitude A_rot_~8km/s in the innermost 2" (0.13pc), decreasing to A_rot_=3.2km/s at 18"<r<160".2013ApJ...769..107Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/769/107CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/eso : ESO Science Archive Catalog (ESO, 1991-2014)B/hst : HST Archived Exposures Catalog (STScI, 2007)J/A+A/563/A80 : WFI ground-based astrometry. V. (Libralato+, 2014)J/A+A/533/A36 : VI phot. and velocity map of NGC 6388 (Luetzgendorf+, 2011)J/ApJ/677/1069 : Blue stragglers in NGC 6388 (Dalessandro+, 2008)J/AJ/134/1298 : CaII EWs in 29 Galactic clusters (Carrera+, 2007)J/AJ/134/229 : CT1T2 Photometry of red giants in 2 globulars (Hughes+, 2007)J/A+A/464/967 : Abundances of red giants in NGC 6388 (Carretta+, 2007)J/AJ/132/447 : Surface Brightness of 38 Gal. GCs (Noyola+, 2006)J/ApJS/161/304 : Clusters in the Milky Way & satellites (McLaughlin+, 2005)J/A+A/391/945 : HST phot. of 74 galactic globular clusters (Piotto+, 2002)J/A+A/324/505 : Core velocity dispersions of globular clusters (Dubath+ 1997)J/AJ/109/218 : Catalogue of globular cluster profiles (Trager+ 1995)J/AJ/107/1764 : RR Lyrae and CMD of NGC 6388 (Silbermann+, 1994)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/769/107https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/769/107http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/769/107https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/769/107https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/769/107http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/769/107GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/769/107/table1 (Parameters for all the stars selected as cluster members and used to compute the rotational velocity and velocity dispersion of NGC 6388)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/769/107/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/769/107/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/769/107/table1?GETtext/xml+votable180.050000true264.07154639-44.734973060.0055555555555555566/42314 42336https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/769/107?format=asciiOpticaldefaultJ/ApJ/769/107/table1Parameters for all the stars selected as cluster members and used to compute the rotational velocity and velocity dispersion of NGC 6388[Fe/H][-0.7/-0.1]? Metallicitylog(Sun)phys.abund.ZfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[20354/10000357] Identification numbermeta.id;meta.mainintprimaryRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainBmag? The B band magnitudemagphot.mag;em.opt.BfloatnullableVmag[14.8/19.3] The V band magnitudemagphot.mag;em.opt.VfloatImag? The I band magnitudemagphot.mag;em.opt.IfloatnullableRVel[-27.6/40.7] Radial velocitykm/sphys.veloc;pos.heliocentricfloate_RVel[0.1/6] Uncertainty in RVelkm/sstat.error;spect.dopplerVelocfloatInst[1/2] Instrument: 1=SINFONI (no metallicity), 2=FLAMESinstrintH07Cross-match with Hughess et al. 2007 (J/AJ/134/229), within 0.5arcsecmeta.ref.urlintnullableSimbadSimbad column added by the CDSmeta.ref.urlchar