J/AJ/135/1117ivo://CDS.VizieR/J/AJ/135/1117doi:10.26093/cds/vizier.51351117CDSMeszaros Sz.Dupree A.K.Szentgyorgyi A.2017-06-27T06:38:04Z2010-07-29T09:34:46ZCDS support team

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

cds-question@unistra.frgiant-starsinfrared-photometryvisible-astronomybroad-band-photometryradial-velocityspectroscopyglobular-star-clustersHigh-resolution spectra of 110 selected red giant stars in the globular cluster M15 (NGC 7078) were obtained with Hectochelle at the MMT telescope in 2005 May, 2006 May, and 2006 October. Echelle orders containing H{alpha} and CaII H&K are used to identify emission and line asymmetries characterizing motions in the extended atmospheres. Emission in H{alpha} is detected to a luminosity of log(L/L_{sun}_)=2.36, in this very metal-deficient cluster, comparable to other studies, suggesting that the appearance of emission wings is independent of stellar metallicity. The faintest stars showing H{alpha} emission appear to lie on the asymptotic giant branch (AGB) in M15. A line-bisector technique for H{alpha} reveals outflowing velocities in all stars brighter than log(L/L_{sun}_)=2.5, and this outflow velocity increases with stellar luminosity, indicating the mass outflow increases smoothly with luminosity. Many stars lying low on the AGB show exceptionally high outflow velocities (up to 10-15km/s) and more velocity variability (up to 6-8km/s) than red giant branch (RGB) stars of similar apparent magnitude. High velocities in M15 may be related to the low cluster metallicity. Dusty stars identified from Spitzer Space Telescope infrared photometry as AGB stars are confirmed as cluster members by radial velocity measurements, yet their H{alpha} profiles are similar to those of RGB stars without dust. If substantial mass loss creates the circumstellar shell responsible for infrared emission, such mass loss must be episodic.2008AJ....135.1117Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/135/1117CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/137/4282 : Red giant stars in clusters. II. M13 and M92 (Meszaros+, 2009)J/ApJ/602/264 : Proper motions and radial velocities in M15 (Mcnamara+, 2004)J/AJ/124/3255 : UBV photometry in M15 (van der Marel+, 2002)J/AJ/119/1268 : CFHT adaptive optics observations of M15 (Gebhardt+, 2000)J/AJ/119/2274 : JK Photometry of globular clusters M15 + M56 (Ivanov+, 2000)J/AJ/113/1026 : Fabry-Perot Observations of M15 (Gebhardt+ 1997)J/A+AS/46/347 : BV photometry of M15 central part (Auriere+, 1981)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/135/1117https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/135/1117http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/135/1117https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/135/1117https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/135/1117http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/135/1117GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/135/1117/stars (Stars studied in M51: photometry, physical parameters, and velocities)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/135/1117/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/135/1117/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/135/1117/stars?GETtext/xml+votable180.050000true322.28512512.15327780.0055555555555555566/124058.650015785639275e-20 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/135/1117?format=asciiOpticalInfrareddefaultJ/AJ/135/1117/starsStars studied in M51: photometry, physical parameters, and velocitiesDEJ20002MASS Degree of Declination (J2000)pos.eq.dec;meta.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDIdentification number (G1)meta.id;meta.maincharprimaryr_ID[def] Reference used (1)meta.ref;pos.framecharBmagCudworth, 1976AJ.....81..519C B band magnitudemagphot.mag;em.opt.Bfloatr_Bmag[g] Reference used for Bmag (1)meta.ref;pos.framecharVmagCudworth, 1976AJ.....81..519C V band magnitudemagphot.mag;em.opt.Vfloatr_Vmag[g] Reference used for Vmag (1)meta.ref;pos.framecharJmag2MASS J band magnitudemagphot.mag;em.IR.JfloatHmag2MASS H band magnitudemagphot.mag;em.IR.HfloatKsmag2MASS Ks band magnitudemagphot.mag;em.IR.KfloatB-VThe (B-V) color indexmagphot.color;em.opt.B;em.opt.VfloatV-KThe (V-K) color indexmagphot.color;em.opt.V;em.IR.KfloatObsObservation code (2)meta.code;obscharVMAGAbsolute V band magnitudemagphys.magAbs;em.opt.VfloatB-ViIntrinsic (B-V) color indexmagphot.color;em.opt.B;em.opt.VfloatV-KiIntrinsic (V-K) color indexmagphot.color;em.opt.V;em.IR.KfloatMm? Membership probability (1)%meta.code.memberintnullableTeffEffective temperatureKphys.temperature.effectiveintlogLLog of the luminositylog(solLum)phys.luminosityfloatRadStar radiussolRadmeta.idfloatRV1? Radial velocity obtained 2005 May 22km/sphys.veloc;pos.heliocentricfloatnullablee_RV1? Uncertainty in RVel1km/sstat.errorfloatnullableRV2? Radial velocity obtained 2006 May 11 (3)km/sphys.veloc;pos.heliocentricfloatnullablee_RV2? Uncertainty in RVel2 (3)km/sstat.errorfloatnullableRV3? Radial velocity obtained 2006 Oct. 4km/sphys.veloc;pos.heliocentricfloatnullablee_RV3? Uncertainty in RVel3km/sstat.errorfloatnullableRV4? Radial velocity obtained 2006 Oct. 7 (3)km/sphys.veloc;pos.heliocentricfloatnullablee_RV4? Uncertainty in RVel4 (3)km/sstat.errorfloatnullableRVmMean radial velocitykm/sphys.veloc;pos.heliocentricfloatnullableVa1? H{alpha} bisector velocity from 2005 May 22km/sphys.velocfloatnullablee_Va1? Uncertainty in Va1km/sstat.errorfloatnullableVa2? H{alpha} bisector velocity from 2006 May 11km/sphys.velocfloatnullablee_Va2? Uncertainty in Va2km/sstat.errorfloatnullableVa3? H{alpha} bisector velocity from 2006 Oct. 4km/sphys.velocfloatnullablee_Va3? Uncertainty in Va3km/sstat.errorfloatnullableVa4? H{alpha} bisector velocity from 2006 Oct. 7km/sphys.velocfloatnullablee_Va4? Uncertainty in Va4km/sstat.errorfloatnullableVamSimbad column added by the CDSkm/sphys.velocfloatnullable2MDisplay the 2MASS data (Cutri et al. 2003, Cat. II/246)meta.ref.urlcharRAJ20002MASS Hour of Right Ascension (J2000)pos.eq.ra;meta.main