J/ApJ/717/277ivo://CDS.VizieR/J/ApJ/717/277doi:10.26093/cds/vizier.17170277CDSMucciarelli A.Origlia L.Ferraro F.R.2017-06-20T13:17:11Z2011-05-10T09:37:34ZCDS support team

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

cds-question@unistra.frchemical-abundancesgiant-starsradial-velocityglobular-star-clustersmetallicityThis paper presents the chemical abundance analysis of a sample of 18 giant stars in three old globular clusters in the Large Magellanic Cloud (LMC), NGC 1786, NGC 2210, and NGC 2257. The derived iron content is [Fe/H]=-1.75+/-0.01dex ({sigma}=0.02dex), -1.65+/-0.02dex ({sigma}=0.04dex), and -1.95+/-0.02dex ({sigma}=0.04dex) for NGC 1786, NGC 2210, and NGC 2257, respectively. All the clusters exhibit similar abundance ratios, with enhanced values (~+0.30dex) of [{alpha}/Fe], consistent with the Galactic halo stars, thus indicating that these clusters have formed from a gas enriched by Type II supernovae. We also found evidence that r-process is the main channel of production of the measured neutron capture elements (Y, Ba, La, Nd, Ce, and Eu). In particular, the quite large enhancement of [Eu/Fe] (~+0.70dex) found in these old clusters clearly indicates a relevant efficiency of the r-process mechanism in the LMC environment.2010ApJ...717..277Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/717/277CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/183 : The Cluster System of the LMC (Kontizas+ 1990)J/ApJ/695/L134 : Chemical anomalies in three old LMC clusters (Mucciarelli+,J/AJ/136/375 : Chemical composition of LMC red giants (Mucciarelli+, 2008)J/AJ/132/1630 : CaII spectroscopy in Magellanic Cloud clusters (Grocholski+,J/ApJ/611/270 : Magellanic star clusters IR fluctuations (Gonzalez+, 2004)J/A+A/404/187 : Equivalent widths for metal-poor stars (Gratton+, 2003)J/AJ/98/2086 : CCD photometry of NGC 2257 RR Lyrae (Walker 1989)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/717/277https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/717/277http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/717/277https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/717/277https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/717/277http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/717/277GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/717/277/stars (Atmospherical parameters and abundance ratios of giant stars in LMC globular clusters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/717/277/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/717/277/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/717/277/stars?GETtext/xml+votable180.050000true6/33123 37514 375507.952274030004205e-20 1.0188844282367877e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/717/277?format=asciiOpticaldefaultJ/ApJ/717/277/starsAtmospherical parameters and abundance ratios of giant stars in LMC globular clustersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDGiant star name (NNNN-NNNN)meta.id;meta.maincharS/N? Signal/Noise ratio (1)stat.snrcharHRV? Heliocentric velocitykm/sspect.dopplerVeloc;pos.heliocentricfloatnullableK0mag? Dereddened K_0_-band magnitudemagphot.mag;em.IR.Kfloatnullable(J-K)0? Dereddeded J-K color indexmagphot.color;em.IR.J;em.IR.KfloatnullableInst[UG]? Adopted instrumental configuration (U for UVES and G for GIRAFFE spectra)phys.atmol.configuration;instr.setupcharTeff? Spectroscopic effective temperatureKphys.temperature.effectiveintnullableTeffp? Photometric effective temperatureKphys.temperature.effectiveintnullablelogg? Surface gravitylog(cm.s**-2)phys.gravityfloatnullable[A/H]? Metallicityphys.abundfloatnullableVt? Microturbulent velocitykm/sphys.velocfloatnullableN? Number of used linesmeta.numberintnullable[Fe/H]? Fe/H metallicity (1)log(Sun)phys.abund.Zfloatnullablee_[Fe/H]? Fe/H internal error (2)log(Sun)stat.error;phys.abund.FefloatnullableNO? Number of line(s) used for [O/Fe]meta.numberintnullablel_[O/Fe]Limit flag in [O/Fe]phys.abundchar[O/Fe]O/Fe abundance ratiophys.abundfloate_[O/Fe]? [O/Fe] internal errorphys.abundfloatnullableNNa? Number of line(s) used for [Na/Fe]meta.numberintnullable[Na/Fe]Na/Fe abundance ratiophys.abundfloate_[Na/Fe]? [Na/Fe] internal errorphys.abundfloatnullableNMg? Number of line(s) used for [Mg/Fe]meta.numberintnullable[Mg/Fe]Mg/Fe abundance ratiophys.abundfloate_[Mg/Fe]? [Mg/Fe] internal errorphys.abundfloatnullableNAl? Number of line(s) used for [Al/Fe]meta.numberintnullablel_[Al/Fe]Limit flag in [Al/Fe]phys.abundchar[Al/Fe]? Al/Fe abundance ratiophys.abundfloatnullablee_[Al/Fe]? [Al/Fe] internal errorphys.abundfloatnullableNSi? Number of line(s) used for [Si/Fe]meta.numberintnullable[Si/Fe]Si/Fe abundance ratiophys.abundfloate_[Si/Fe]? [Si/Fe] internal errorphys.abundfloatnullableNCa? Number of line(s) used for [Ca/Fe]meta.numberintnullable[Ca/Fe]Ca/Fe abundance ratiophys.abundfloate_[Ca/Fe]? [Ca/Fe] internal errorphys.abundfloatnullableNTi? Number of line(s) used for [Ti/Fe]meta.numberintnullable[Ti/Fe]? Ti/Fe abundance ratiophys.abundfloatnullablee_[Ti/Fe]? [Ti/Fe] internal errorphys.abundfloatnullableNSc? Number of line(s) used for [Sc/Fe]meta.numberintnullable[Sc/Fe]IIAbundance ratio of [Sc/Fe]IIphys.abundfloate_[Sc/Fe]II? [Sc/Fe]II internal errorphys.abundfloatnullableNV? Number of line(s) used for [V/Fe]meta.numberintnullable[V/Fe]? V/Fe abundance ratiophys.abundfloatnullablee_[V/Fe]? [V/Fe] internal errorphys.abundfloatnullableNCr? Number of line(s) used for [Cr/Fe]meta.numberintnullable[Cr/Fe]? Cr/Fe abundance ratiophys.abundfloatnullablee_[Cr/Fe]? [Cr/Fe] internal errorphys.abundfloatnullableNNi? Number of line(s) used for [Ni/Fe]meta.numberintnullable[Ni/Fe]Ni/Fe abundance ratiophys.abundfloate_[Ni/Fe]? [Ni/Fe] internal errorphys.abundfloatnullableNY? Number of line(s) used for [Y/Fe]IImeta.numberintnullable[Y/Fe]II? Abundance ratio of [Y/Fe]IIphys.abundfloatnullablee_[Y/Fe]II? [Y/Fe]II internal errorphys.abundfloatnullableNBa? Number of line(s) used for [Ba/Fe]IImeta.numberintnullable[Ba/Fe]IIAbundance ratio of [Ba/Fe]IIphys.abundfloate_[Ba/Fe]II? [Ba/Fe]II internal errorphys.abundfloatnullableNLa? Number of line(s) used for [La/Fe]IImeta.numberintnullablel_[La/Fe]IILimit flag in [La/Fe]IIphys.abundchar[La/Fe]II? Abundance ratio of [La/Fe]IIphys.abundfloatnullablee_[La/Fe]II? [La/Fe]II internal errorphys.abundfloatnullableNCe? Number of line(s) used for [Ce/Fe]meta.numberintnullablel_[Ce/Fe]IILimit flag in [Ce/Fe]IIphys.abundchar[Ce/Fe]II? Abundance ratio of [Ce/Fe]IIphys.abundfloatnullablee_[Ce/Fe]II? [Ce/Fe]II internal errorphys.abundfloatnullableNNd? Number of line(s) used for [Nd/Fe]IImeta.numberintnullable[Nd/Fe]II? Abundance ratio of [Nd/Fe]IIphys.abundfloatnullablee_[Nd/Fe]II? [Nd/Fe]II internal errorphys.abundfloatnullableNEu? Number of line(s) used for [Eu/Fe]IImeta.numberintnullable[Eu/Fe]II? Abundance ratio of [Eu/Fe]IIphys.abundfloatnullablee_[Eu/Fe]II? [Eu/Fe]II internal errorphys.abundfloatnullableSimbadSimbad column added by the CDSmeta.refcharRAJ2000? Right ascension in decimal degrees onto 2MASS astrometric system (J2000)degpos.eq.ra;meta.mainnullableDEJ2000? Declination in decimal degrees onto 2MASS astrometric system (J2000)degpos.eq.dec;meta.mainnullable