J/A+A/607/A135ivo://CDS.VizieR/J/A+A/607/A135doi:10.26093/cds/vizier.36070135CDSWang Y.Primas F.Charbonnel C.Van der Swaelmen M.Bono G.,Chantereau W.Zhao G.2017-12-13T19:24:51Z2017-11-28T09:28:53ZCDS support team

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

cds-question@unistra.frglobular-star-clustersgiant-starschemical-abundancesphotometryradial-velocityWe analyze high-resolution spectra of a large sample of asymptotic giant branch AGB and red giant branch (RGB) stars in the Galactic GCs NGC 104, NGC 6121, and NGC 6809 obtained with FLAMES/GIRAFFE at ESO/VLT, and determine their Na abundances. This is the first time that the AGB stars in NGC 6809 are targeted. We find that NGC 104 and NG 6809 have comparable AGB and RGB Na abundance distributions, while NGC 6121 shows a lack of very Na-rich AGB stars. Moreover, to investigate the dependence of AGB Na abundance dispersion on GC parameters, we compare the AGB [Na/H] distributions of a total of nine GCs, with five determined by ourselves with homogeneous method and four from literature, covering a wide range of GC parameters. Their Na abundances and multiple populations of AGB stars form complex picture. In some GCs, AGB stars have similar Na abundances and/or second-population fractions as their RGB counterparts, while some GCs do not have Na-rich second-population AGB stars, and various cases exist between the two extremes. In addition, the fitted relations between fractions of the AGB second population and GC global parameters show that the AGB second-population fraction slightly anticorrelates with GC central concentration, while no robust dependency can be confirmed with other GC parameters.2017A&A...607A.135Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/607/A135CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/592/A66 : NGC 2808 AGB and RGB stars Na abundance (Wang+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/607/A135https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/607/A135http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/607/A135https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/607/A135https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/607/A135http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/607/A135GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/607/A135/sample (Basic informations (table 3), stellar parameters (table 5) and Na abundances (table 7) of our stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/607/A135/sample?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/607/A135/sample?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/607/A135/sample?GETtext/xml+votable180.050000true5.7252083-72.08805560.0055555555555555566/33321 33323 42955 47970-479717.952274030004205e-20 4.920466254354166e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/607/A135?format=asciiOpticaldefaultJ/A+A/607/A135/sampleBasic informations (table 3), stellar parameters (table 5) and Na abundances (table 7) of our stars[Na/H]LTE? LTE [Na/H] (1)phys.abundfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNGCGlobular cluster identificationmeta.id.parentcharStarIDStar identification (1)meta.id;meta.maincharEvolPhEvolutionary phasesrc.classcharInstInstrument used to obtain the spectruminstr.setupcharRAJ2000Right Ascension J2000pos.eq.ra;meta.mainDEJ2000Declination J2000pos.eq.dec;meta.mainBmagApparent B magnitude (2)magphot.mag;em.opt.Bfloate_BmagError of B magnitude (2)magstat.error;phot.mag;em.opt.BfloatVmagApparent V magnitude (2)magphot.mag;em.opt.Vfloate_VmagError of V magnitude (2)magstat.error;phot.mag;em.opt.VfloatImagApparent I magnitude (2)magphot.mag;em.opt.Ifloate_ImagError of I magnitude (2)magstat.error;phot.mag;em.opt.IfloatJmag? J magnitude (3)magphot.mag;em.IR.Jfloatnullablee_Jmag? Error of J magnitude (3)magstat.error;phot.mag;em.IR.JfloatnullableHmag? H magnitude (3)magphot.mag;em.IR.Hfloatnullablee_Hmag? Error of H magnitude (3)magstat.error;phot.mag;em.IR.HfloatnullableKmag? K magnitude (3)magphot.mag;em.IR.Kfloatnullablee_Kmag? Error of K magnitude (3)magstat.error;phot.mag;em.IR.KfloatnullableRVBarycentric radial velocitykm/sphys.veloc;pos.heliocentricfloat2MDisplay the 2MASS data (Cutri et al. 2003, Cat. II/246)meta.ref.urlcharTeffEffective temperatureKphys.temperature.effectiveints_TeffScatter of the temperature (1)Kstat.error;phys.temperaturefloatloggSurface gravityphys.gravityfloatVturbMicroturbulence velocitykm/sphys.veloc.microTurbfloat[FeI/H]LTELTE [FeI/H] ratiophys.abund.Fefloats_FeIlineAbundance dispersion of FeI linesinstr.dispersionfloat[FeII/H]Line ratio [FeII/H]phys.abund.Fefloats_FeIIlineAbundance dispersion of FeII linesinstr.dispersionfloat[FeI/H]NLTENLTE [FeI/H] ratiophys.abund.Fefloat[Na/H]NLTE? NLTE [Na/H] (1)phys.abundfloatnullable[Na/FeI]NLTE? NLTE [Na/FeI] (1)phys.abundfloatnullable