J/AJ/119/1268ivo://CDS.VizieR/J/AJ/119/1268doi:10.26093/cds/vizier.51191268CDSGebhardt K.Pryor C.O'Connell R.D.Williams T.B.Hesser J.E.2023-04-06T16:50:36Z2006-01-16T18:39:59ZCDS support team

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

cds-question@unistra.frglobular-star-clustersradial-velocityWe have used an Imaging Fabry-Perot Spectrophotometer with the Adaptive Optics Bonnette on the Canada-France-Hawaii Telescope to measure stellar radial velocities in the globular cluster M15 (NGC 7078). An average seeing of 0.15'' FWHM, with the best-seeing image having 0.09'', allowed us to measure accurately the velocities for five stars within 1'' of the center of M15. Our estimate of the second moment of the velocity distribution (i.e., the dispersion, ignoring rotation) inside a radius of 2'' is 11.5 km.s^-1^, the same value we find out to a radius of about 6''. However, the projected net rotation does increase dramatically at small radii, as our previous observations led us to suspect. The rotation amplitude inside a radius of 3.4'' is v=10.4+/-2.7 km.s^-1^ and the dispersion after removing the rotation is {sigma}=10.3+/-1.4 km.s^-1^, so v/{sigma} {~} 1 in this region. In addition, the position angle of the projected rotation axis differs by 100 degrees from that of the net cluster rotation at larger radii.2000AJ....119.1268Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/119/1268CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/347/251 : Dynamics of the globular cluster M15 (Peterson+ 1989)J/AJ/106/154 : HST Observations in inner region of M15 (Ferraro+ 1993)J/AJ/107/1745 : HST UVI photometry of M15. II. (Yanny+, 1994)J/AJ/107/2067 : Fabry-Perot measurements of M15 (Gebhardt+, 1994)J/A+AS/119/307 : Position in M15 (Le Campion+, 1996)J/AJ/113/1026 : Fabry-Perot Observations of M15 (Gebhardt+ 1997)J/AJ/115/708 : Radial Velocities in the Field of M15 (Drukier+ 1998)J/AJ/124/3255 : UBV photometry in M15 (van der Marel+, 2002)J/ApJ/595/187 : Proper motions in M15 (McNamara+, 2003)J/ApJ/602/264 : Proper motions and radial velocities in M15 (Mcnamara+, 2004)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/119/1268https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/119/1268http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/119/1268https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/119/1268https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/119/1268http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/119/1268GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/119/1268/table1 (M15 stellar velocity results)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/119/1268/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/119/1268/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/119/1268/table1?GETtext/xml+votable180.050000true322.4914719412.168112780.0055555555555555566/12405 12407https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/119/1268?format=asciiOpticaldefaultJ/AJ/119/1268/table1M15 stellar velocity resultsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintVGGIdentification number from the WFPC2 photometry of Guhathakurta et al. (2000)intprimaryT2[*] when the star is also in table 2.charEWoffEast-West offsetarcminfloatNSoffNorth-South offsetarcminfloatVelMean radial velocitykm/sfloate_VelUncertainty in Velkm/sfloatVmagV band magnitudemagfloatProb? Probability of the chi^2^ from the multiple measurements exceeding the observed value by chance%floatnullableOIDIdentification by Auriere & Cordoni (1981A&A...100..307A)char_RAPosition computed from a comparison with catalog J/AJ/124/3255/table1 ({sigma}<0.2'') (right ascension part)degpos.eq.ra;meta.main_DEPosition computed from a comparison with catalog J/AJ/124/3255/table1 ({sigma}<0.2'') (declination part)degpos.eq.dec;meta.mainJ/AJ/119/1268/table2M15 multiple velocity measurementse_DM94? Uncertainty in MD94km/sfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintVGGIdentification number from the WFPC2 photometry of Guhathakurta et al. (2000)intFP95? Velocity from Fabry-Perot observations obtained in 1995km/sfloatnullablee_FP95? Uncertainty in FP95km/sfloatnullableFP94? Velocity from Fabry-Perot observations obtained in 1994km/sfloatnullablee_FP94? Uncertainty in FP94km/sfloatnullableFP92? Velocity from Fabry-Perot observations obtained in 1992km/sfloatnullablee_FP92? Uncertainty in FP92km/sfloatnullableFP91? Velocity from Fabry-Perot observations obtained in 1991km/sfloatnullablee_FP91? Uncertainty in FP91km/sfloatnullablePSC? Velocity from Peterson et al. (1989ApJ...347..251P)km/sfloatnullablee_PSC? Uncertainty in PSCkm/sfloatnullableFP98? Velocity from Fabry-Perot observations obtained in 1995km/sfloatnullablee_FP98? Uncertainty in FP98km/sfloatnullableD98? Velocity from Drukier et al. (1998AJ....115..708D)km/sfloatnullablee_D98? Uncertainty in D98km/sfloatnullableDM94? Velocity from Dubath & Meylan (1994A&A...290..104D)km/sfloatnullable