J/ApJ/813/97ivo://CDS.VizieR/J/ApJ/813/97doi:10.26093/cds/vizier.18130097CDSLapenna E.Mucciarelli A.Ferraro F.R.Origlia L.Lanzoni B.,Massari D.Dalessandro E.2018-01-08T06:58:08Z2016-03-21T15:28:30ZCDS support team

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

cds-question@unistra.frglobular-star-clusterschemical-abundancesradial-velocitygiant-starsWe have collected UVES-FLAMES high-resolution spectra for a sample of 6 asymptotic giant branch (AGB) and 13 red giant branch (RGB) stars in the Galactic globular cluster (GC) M62 (NGC 6266). Here we present the detailed abundance analysis of iron, titanium, and light elements (O, Na, Mg, and Al). For the majority (five out of six) of the AGB targets, we find that the abundances of both iron and titanium determined from neutral lines are significantly underestimated with respect to those obtained from ionized features, the latter being, instead, in agreement with those measured for the RGB targets. This is similar to recent findings in other clusters and may suggest the presence of nonlocal thermodynamic equilibrium (NLTE) effects. In the O-Na, Al-Mg, and Na-Al planes, the RGB stars show the typical correlations observed for GC stars. Instead, all the AGB targets are clumped in the regions where first-generation stars are expected to lie, similar to what was recently found for the AGB population of NGC6752. While the sodium and aluminum abundances could be underestimated as a consequence of the NLTE bias affecting iron and titanium, the oxygen line used does not suffer from the same effects, and the lack of O-poor AGB stars therefore is a solid result. We can thus conclude that none of the investigated AGB stars belongs to the second stellar generation of M62. We also find an RGB star with extremely high sodium abundance ([Na/Fe]=+1.08dex).2015ApJ...813...97Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/813/97CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/801/69 : Iron EWs for NGC3201 giant star members (Mucciarelli+, 2015)J/A+A/564/A60 : NGC 4833 Na-O measured with FLAMES (Carretta+, 2014)J/ApJS/208/27 : Sun and HD 84937 TiII log(gf) and abundances (Wood+, 2013)J/ApJ/775/L27 : Chemical abundances in a metal-poor RGB star (Johnson+, 2013)J/A+A/557/A128 : Stellar [Fe/H] and [Na/H] in NGC6752 (Carretta, 2013)J/other/Nat/498.198 : Na abundances in NGC6752 (Campbell+, 2013)J/AJ/143/70 : Differential reddening in MW globulars (Alonso-Garcia+, 2012)J/ApJ/754/L38 : Abundances & radial velocities of M13 giants (Johnson+, 2012)J/ApJ/750/91 : Metallicities of old stellar systems (Chattopadhyay+, 2012)J/A+A/534/A80 : Bulge clump giant metallicity in Baade's window (Hill+, 2011)J/ApJ/731/64 : Spectroscopy of 300 RGBs in {omega} Cen (Marino+, 2011)J/MNRAS/405/839 : Spectroscopic obs. of globular clusters (Sharina+, 2010)J/A+A/505/139 : Abundances of red giants in 17 GCs (Carretta+, 2009)J/A+A/505/117 : Abundances of red giants in 15 GCs (Carretta+, 2009)J/ApJ/695/L134 : Chemical anomalies in old LMC clusters (Mucciarelli+, 2009)J/A+A/486/177 : Bulge field stars from FLAMES-GIRAFFE sp. (Zoccali+, 2008)J/A+A/354/169 : Metal-poor field stars abundances (Gratton+, 2000)J/A+A/350/955 : Atmospheric param. in metal-poor stars. II (Gratton+, 1999)J/A+A/340/300 : Fe II oscillator strengths (Raassen+ 1998)J/A+A/324/505 : Core velocity dispersions of globular clusters (Dubath+ 1997)J/MNRAS/272/391 : Globular clusters in the Magellanic Clouds (Ferraro+, 1995)http://wwwuser.oats.inaf.it/castelli/linelists.html : Line listshttp://www.nist.gov/pml/data/asd.cfm : NIST atomic spectra databasehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/813/97https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/813/97http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/813/97https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/813/97https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/813/97http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/813/97GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/813/97/giant (Photometric properties and radial velocities and atmospheric parameters and abundances of the RGB and AGB samples (tables 1, 3 and 4))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/813/97/giant?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/813/97/giant?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/813/97/giant?GETtext/xml+votable180.050000true255.2961736-30.11225360.0055555555555555566/42841https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/813/97?format=asciiOpticaldefaultJ/ApJ/813/97/giantPhotometric properties and radial velocities and atmospheric parameters and abundances of the RGB and AGB samples (tables 1, 3 and 4)nNa[3/4] Number of NaI lines usedphys.abundintnTiII[6/15] Number of TiII lines usedphys.abundintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[50/158] Identification numbermeta.id;meta.mainintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainUmag[17.1/17.9] U-band magnitudemagphot.mag;em.opt.UfloatVmag[14/15.2] V-band magnitudemagphot.mag;em.opt.VfloatU0mag[14.3/15.1] U-band magnitude reddening correctedmagphot.mag;em.opt.UfloatV0mag[12.1/13.5] V-band magnitude reddening correctedmagphot.mag;em.opt.VfloatHRV[-110/-53.4] Heliocentric radial velocitykm/sspect.dopplerVeloc;pos.heliocentricfloate_HRV[0.04/0.09] HRV uncertaintykm/sstat.errorfloatTypeType of star (R=RGB, A=AGB)meta.code.classcharTeff[4215/4840] Spectroscopic effective temperatureKphys.temperature.effectiveintlogg[0.8/1.6] Surface gravitylog(cm.s**-2)phys.gravityfloatVturb[1.3/1.8] Microturbulent velocitykm/sphys.velocfloat[FeI/H][-1.3/-1] Abundance of [FeI/H]log(Sun)phys.abundfloate_[FeI/H][0.01] [FeI/H] internal uncertaintylog(Sun)stat.error;phys.abundfloatnFeI[102/146] Number of FeI lines usedmeta.numberint[FeII/H][-1.2/-0.9] Abundance of [FeII/H]log(Sun)phys.abundfloate_[FeII/H][0.01/0.04] [FeII/H] internal uncertaintylog(Sun)stat.error;phys.abundfloatnFeII[7/12] Number of FeII lines usedmeta.numberint[TiI/H][-1.2/-0.7] Abundance of [TiI/H]log(Sun)phys.abundfloate_[TiI/H][0.01/0.03] [TiI/H] internal uncertaintylog(Sun)stat.error;phys.abundfloatnTiI[27/63] Number of TiI lines usedphys.abundint[TiII/H][-1.1/-0.8] Abundance of [TiII/H]log(Sun)phys.abundfloate_[TiII/H][0.03/0.07] [TiII/H] internal uncertaintylog(Sun)stat.error;phys.abundfloatl_[OI/FeII]Upper limit flag on [OI/FeII]meta.code.errorchar[OI/FeII][-0.4/0.4] Abundance of [OI/FeII] (2)log(Sun)phys.abundfloate_[OI/FeII][0.04/0.09]? [OI/FeII] uncertaintylog(Sun)stat.errorfloatnullable[NaI/FeI]L[-0.2/1.1] LTE abundance of [NaI/FeI] (3)log(Sun)phys.abundfloate_[NaI/FeI]L[0.04/0.2] [NaI/FeI]L uncertaintylog(Sun)stat.errorfloat[NaI/FeI]N[-0.08/1.1] NLTE abundance of [NaI/FeI] (3)log(Sun)phys.abundfloate_[NaI/FeI]N[0.02/0.2] [NaI/FeI]N uncertaintylog(Sun)stat.errorfloat[MgI/FeI][0.3/0.6] Abundance of [MgI/FeI]log(Sun)phys.abundfloate_[MgI/FeI][0.01/0.09] [MgI/FeI] uncertaintylog(Sun)stat.errorfloatnMg[2/3] Number of MgI lines usedphys.abundint[AlI/FeI][0.1/1.2] Abundance of [AlI/FeI]log(Sun)phys.abundfloate_[AlI/FeI][0/0.07] [AlI/FeI] uncertaintylog(Sun)stat.errorfloatnAl[1/2] Number of AlI lines usedphys.abundint[TiI/FeI][0.06/0.4] Abundance of [TiI/FeI]log(Sun)phys.abundfloate_[TiI/FeI][0.01/0.04] [TiI/FeI] uncertaintylog(Sun)stat.errorfloat[TiII/FeII][0.05/0.3] Abundance of [TiII/FeII]log(Sun)phys.abundfloate_[TiII/FeII][0.03/0.08] [TiII/FeII] uncertaintylog(Sun)stat.errorfloatSimbadSimbad column added by the CDSphys.abundcharJ/ApJ/813/97/table2Wavelength, element, oscillator strength, excitation potential, and reference source of adopted linesIonIon identifierphys.atmol.ionStagecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambda[4806.3/6750.2] Wavelength; Angstroms0.1nmem.wldoublelog(gf)[-9.8/0.7] Log oscillator strengthphys.atmol.oscStrengthfloatExPot[0/5.2] Excitation potentialeVphys.atmol.excitationfloatRefReference (1)meta.ref;pos.framecharBibCodeBibcode of Reference if relevantmeta.bib.bibcodechar