J/ApJ/698/2048ivo://CDS.VizieR/J/ApJ/698/2048doi:10.26093/cds/vizier.16982048CDSJohnson C.I.Pilachowski C.A.Rich R.M.Fulbright J.P.2017-06-21T08:21:44Z2011-07-19T12:32:16ZCDS support team

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

cds-question@unistra.frgiant-starsline-intensitiesmetallicityglobular-star-clustersinfrared-photometryWe present abundances of several light, {alpha}, Fe-peak, and neutron-capture elements for 66 red giant branch (RGB) stars in the Galactic globular cluster Omega Centauri ({omega} Cen). Our observations lie in the range 12.0<V<13.5 and focus on the intermediate and metal-rich RGBs. Abundances were determined using equivalent width measurements and spectrum synthesis analyses of moderate resolution (R~18000) spectra obtained with the Blanco 4m telescope and Hydra multifiber spectrograph. Combining these data with previous work, we find that there are at least four peaks in the metallicity distribution function at [Fe/H]=-1.75, -1.45, -1.05, and -0.75, which correspond to about 55%, 30%, 10%, and 5% of our sample, respectively. We conclude that the metal-rich population must be at least 1-2Gyr younger than the metal-poor stars, owing to the long timescales needed for strong s-process enrichment and the development of a large contingent of mass transfer binaries.2009ApJ...698.2048Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/698/2048CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)J/ApJS/99/637 : Equivalent widths for 54 red giants (Norris+ 1995)J/ApJ/462/241 : Ca abundance for Omega Cen red giants (Norris+ 1996)J/A+A/360/472 : Proper motions in omega Centauri (van Leeuwen+, 2000)J/MNRAS/357/265 : BVI photometry of omega Cen red giants (Sollima+, 2005)J/ApJ/681/1505 : Abundances of red giants in {omega} Cen (Johnson+, 2008)J/MNRAS/396/2183 : Radial velocities of red giants in {omega} Cen (Sollima+https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/698/2048https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/698/2048http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/698/2048https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/698/2048https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/698/2048http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/698/2048GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/698/2048/stars (Photometry, membership, atmospheric parameters, and abundances of the 66 giants)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/698/2048/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/698/2048/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/698/2048/stars?GETtext/xml+votable180.050000true201.6021428-47.15314140.0055555555555555566/43225 432278.650015785639275e-20 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/698/2048?format=asciiInfrareddefaultJ/ApJ/698/2048/ewEquivalent WidthsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLEIDvan Leeuwen et al. identification number (G1)meta.id;meta.mainintlambdaWavelength in Angstroms0.1nmem.wlfloatIonIon identificationmeta.id;phys.atmol.ionStagecharExPotExcitation potentialeVphys.atmol.excitationfloatlog(gf)Log of the oscillator strengthphys.atmol.oscStrengthfloatEW? Equivalent width, in m{AA} = 10^-13^m (1)0.1pmspect.line.eqWidth;em.radio.20-100MHzintnullablef_EW[s] Flag indicating synthetic valuemeta.codecharJ/ApJ/698/2048/starsPhotometry, membership, atmospheric parameters, and abundances of the 66 giantsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLEIDvan Leeuwen et al. identification number (G1)meta.id;meta.mainintprimaryROA? Woolley (1966ROAn....2....1W) identification numbermeta.id.crossintnullableVmagThe V band magnitudemagphot.mag;em.opt.VfloatB-VThe (B-V) color indexmagphot.color;em.opt.B;em.opt.VfloatJmag2MASS Johnson J band magnitudemagphot.mag;em.IR.JfloatHmag2MASS Johnson H band magnitudemagphot.mag;em.IR.HfloatKsmag2MASS Johnson Ks band magnitudemagphot.mag;em.IR.KfloatVMAGAbsolute V band magnitudemagphys.magAbs;em.opt.VfloatProbvan Leeuwen et al. 2000, Cat. J/A+A/360/472 membership probability%statintTeffEffective temperatureKphys.temperature.effectiveintlog(g)Log surface gravitylog(cm.s**-2)phys.gravityfloat[Fe/H]Average metallicitylog(Sun)phys.abund.Z;stat.meanfloatVtTurbulent velocity {xi}km/sphys.veloc.microTurbfloatSN6125? Signal-to-Noise at 612.5nmstat.snrintnullableSN6670? Signal-to-Noise at 667.0nmstat.snrintnullable[Fe1/H]Derived [FeI/H] abundancelog(Sun)phys.abundfloatnullable[Fe2/H]? Derived [FeII/H] abundancelog(Sun)phys.abundfloatnullable[Na1/Fe]? Derived [NaI/Fe] abundancelog(Sun)phys.abundfloatnullable[Al1/Fe]? Derived [AlI/Fe] abundancelog(Sun)phys.abundfloatnullable[Ca1/Fe]? Derived [CaI/Fe] abundancelog(Sun)phys.abundfloatnullable[Sc1/Fe]? Derived [ScI/Fe] abundancelog(Sun)phys.abundfloatnullable[Sc2/Fe]? Derived [ScII/Fe] abundancelog(Sun)phys.abundfloatnullable[Sc/Fe]? Average derived [Sc/Fe] abundancelog(Sun)phys.abundfloatnullable[Ti1/Fe]? Derived [TiI/Fe] abundancelog(Sun)phys.abundfloatnullable[Ti2/Fe]? Derived [TiII/Fe] abundancelog(Sun)phys.abundfloatnullable[Ti/Fe]? Average derived [Ti/Fe] abundancelog(Sun)phys.abundfloatnullable[Ni1/Fe]? Derived [NiI/Fe] abundancelog(Sun)phys.abundfloatnullable[La2/Fe]? Derived [LaII/Fe] abundancelog(Sun)phys.abundfloatnullable[Eu2/Fe]? Derived [EuII/Fe] abundancelog(Sun)phys.abundfloatnullablevL00Display the data from van Leeuwen et al. 2000 (Cat. J/A+A/360/472) for this starmeta.ref.urlchar2MDisplay the 2MASS data (Cutri et al. 2003, Cat. II/246)meta.ref.urlcharSimbadSimbad column added by the CDSchar_RAPositions from van Leeuwen et al. (2000, Cat. J/A+A/360/472) (right ascension part)degpos.eq.ra;meta.main_DEPositions from van Leeuwen et al. (2000, Cat. J/A+A/360/472) (declination part)degpos.eq.dec;meta.main