J/A+A/486/437ivo://CDS.VizieR/J/A+A/486/437doi:10.26093/cds/vizier.34860437CDSKayser A.Hilker M.Grebel E.K.Willemsen P.G.2008-12-17T11:52:01Z2008-12-17T12:24:17ZCDS support team

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

cds-question@unistra.frglobular-star-clusterschemical-abundancesOur work focuses on the understanding of the origin of CNO-anomalies, which have been detected in several Galactic globular clusters. The novelty and advantage of this study is that it is based on a homogeneous data set of hundreds of medium-resolution spectra of stars in eight Galactic globular clusters (M 15, M 22, M 55, NGC 288, NGC 362, NGC 5286, Palomar 12, and Terzan 7). Two of the clusters (Palomar 12 and Terzan 7) are believed to be former members of the Sagittarius dwarf spheroidal (Sgr dSph) galaxy. The large homogeneous data set allows for a detailed differential study of the line strengths in the stellar spectra of the observed clusters. Our sample comprises stars in different evolutionary states, namely the main-sequence turn-off (MSTO) region, the subgiant branch (SGB) and the base of the red giant branch (RGB). We compare the relative CN and CH line strengths of stars in the same evolutionary states (with similar logg and T_eff_).2008A&A...486..437Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/486/437CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/103 : Galactic Globular Clusters (Monella 1985)VII/151 : Galactic Globular Clusters Structure Parameters (Webbink 1985)J/AJ/106/154 : HST Observations in inner region of M15 (Ferraro+ 1993)J/PASP/109/883 : Globular metallicity scale. I. (Rutledge+ 1997)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/486/437https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/486/437http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/486/437https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/486/437https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/486/437http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/486/437GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/486/437/tablea1 (List of spectroscopic sample stars, ordered by increasing V magnitude)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/486/437/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/486/437/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/486/437/tablea1?GETtext/xml+votable180.050000true13.23449-26.531420.0055555555555555566/12405 16647 28972-28973 33330 43125 47916 48444https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/486/437?format=asciiOpticaldefaultJ/A+A/486/437/tablea1List of spectroscopic sample stars, ordered by increasing V magnituderecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName of star observed (Cluster-NN) (1)meta.id;meta.maincharRAJ2000Right ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainVmagApparent V magnitude as determined by PSF photometry with DAOPHOT II under IRAFmagphot.mag;em.opt.VfloatB-VB-V color from PSF photometrymagphot.color;em.opt.B;em.opt.VfloatCNMeasured CN strength index S3839magspect.indexfloate_CNrms uncertainty on CNmagstat.errorfloatCHMeasured CH band strength index CH4300magspect.indexfloate_CHrms uncertainty on CHmagstat.errorfloatdCNCalculated CN-excess parameter {delta}CNmagspect.indexfloatRVRadial velocity (2)km/sphys.velocfloatTypeStar position on HR diagram (3)src.classcharSNameSimbad name of the starmeta.idchar