J/ApJ/681/1505ivo://CDS.VizieR/J/ApJ/681/1505doi:10.26093/cds/vizier.16811505CDSJohnson C.I.Pilachowski C.A.Simmerer J.Schwenk D.2018-01-30T07:18:08Z2010-12-06T13:59:34ZCDS support team

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

cds-question@unistra.frgiant-starsmetallicityradial-velocityglobular-star-clustersline-intensitiesphotometryspectroscopyWe present radial velocities and Fe and Al abundances for 180 red giant branch (RGB) stars in the Galactic globular cluster Omega Centauri ({omega} Cen). The majority of our data lie in the range 11.0<V<13.5, which covers the RGB from about 1mag above the horizontal branch to the RGB tip. The selection procedures are biased toward preferentially observing the more metal-poor and luminous stars of {omega} Cen. Abundances were determined using equivalent width measurements and spectrum synthesis analyses of moderate resolution spectra (R~13000) obtained with the Blanco 4m telescope and Hydra multifiber spectrograph. Our results are in agreement with previous studies as we find at least four different metallicity populations with [Fe/H]=-1.75, -1.45, -1.05, and -0.75, with a full range of -2.20<~[Fe/H]<~-0.70. Results seem to fit in the adopted scheme that star formation occurred in {omega} Cen over >1Gyr.2008ApJ...681.1505Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/681/1505CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/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/A+A/445/503 : Radial velocities in Omega Cen (NGC5139) (Reijns+, 2006)J/ApJ/647/1075 : Age-metallicity relation of {omega} Cen (Stanford+, 2006)J/ApJ/661/L155 : Radial velocities Rgb stars in omega Cen (Pancino+, 2007)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/681/1505https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/681/1505http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/681/1505https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/681/1505https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/681/1505http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/681/1505GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/681/1505/RGBdata (180 RGB data in {omega} Cen)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/681/1505/RGBdata?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/681/1505/RGBdata?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/681/1505/RGBdata?GETtext/xml+votable180.050000true201.6021667-47.15313890.0055555555555555566/43225 43227https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/681/1505?format=asciiOpticaldefaultJ/ApJ/681/1505/table4Line listrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIonElement namemeta.id;phys.atmol.elementcharWaveWavelength in Angstroms0.1nmem.wlfloatExPotExcitation PotentialeVphys.atmol.excitationfloatlog(gf)Log of oscillator strengthphys.atmol.oscStrengthfloatJ/ApJ/681/1505/RGBdata180 RGB data in {omega} CenrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarVan Leeuwen et al. (2000, Cat. J/A+A/360/472) identification (G1)meta.id;meta.mainintOName? Woolley (1966ROAn....2....1W) identification number (G2)meta.idintnullableHRVHeliocentric radial velocitykm/sspect.dopplerVeloc;pos.heliocentricfloate_HRVError in HRVkm/sstat.errorfloatsigmaThe 1{sigma} deviation from meanstat.stdevfloatMm? van Leeuwen et al. (2000, Cat. J/A+A/360/472) membership probability%stat.fit.goodnessintnullableVmagvan Leeuwen et al. (2000, Cat. J/A+A/360/472) V band magnitudemagphot.mag;em.opt.VfloatB-VThe (B-V) color indexmagphot.color;em.opt.B;em.opt.VfloatV-KThe (V-Ks) color index (1)magphot.color;em.opt.V;em.IR.KfloatVMAGExtinction corrected absolute V band magnitudemagphys.magAbs;em.opt.VfloatTeffEffective temperatureKphys.temperature.effectiveintlog(g)Log of surface gravitylog(cm.s**-2)phys.gravityfloatVturbMicroturbulent velocitykm/sphys.velocfloatW6516? Equivalent width at 6516 Angstroms (1)0.1pmspect.line.eqWidthintnullableW6533? Equivalent width at 6533 Angstroms (1)0.1pmspect.line.eqWidthintnullableW6546? Equivalent width at 6546 Angstroms (1)0.1pmspect.line.eqWidthintnullableW6551? Equivalent width at 6551 Angstroms (1)0.1pmspect.line.eqWidthintnullableW6574? Equivalent width at 6574 Angstroms (1)0.1pmspect.line.eqWidthintnullableW6592Equivalent width at 6592 Angstroms (1)0.1pmspect.line.eqWidthintW6593? Equivalent width at 6593 Angstroms (1)0.1pmspect.line.eqWidthintnullableW6597? Equivalent width at 6597 Angstroms (1)0.1pmspect.line.eqWidthintnullableW6608? Equivalent width at 6608 Angstroms (1)0.1pmspect.line.eqWidthintnullableW6609? Equivalent width at 6609 Angstroms (1)0.1pmspect.line.eqWidthintnullableW6625? Equivalent width at 6625 Angstroms (1)0.1pmspect.line.eqWidthintnullableW6627? Equivalent width at 6627 Angstroms (1)0.1pmspect.line.eqWidthintnullableW6633? Equivalent width at 6633 Angstroms (1)0.1pmspect.line.eqWidthintnullableW6646? Equivalent width at 6646 Angstroms (1)0.1pmspect.line.eqWidthintnullableW6648? Equivalent width at 6648 Angstroms (1)0.1pmspect.line.eqWidthintnullableW6677? Equivalent width at 6677 Angstroms (1)0.1pmspect.line.eqWidthintnullableW6696? Equivalent width at 6696 Angstroms (1)0.1pmspect.line.eqWidthintnullablef_W6696[S] Flag on W6696 (2)meta.codecharW6698? Equivalent width at 6698 Angstroms (1)0.1pmspect.line.eqWidthintnullablef_W6698[S] Flag on W6698 (2)meta.codecharW6703? Equivalent width at 6703 Angstroms (1)0.1pmspect.line.eqWidthintnullableW6710? Equivalent width at 6710 Angstroms (1)0.1pmspect.line.eqWidthintnullableW6726? Equivalent width at 6726 Angstroms (1)0.1pmspect.line.eqWidthintnullableW6733? Equivalent width at 6733 Angstroms (1)0.1pmspect.line.eqWidthintnullableW6739? Equivalent width at 6739 Angstroms (1)0.1pmspect.line.eqWidthintnullablelogFeLog of Fe number {epsilon} abundance (1)meta.idfloat[Fe/H]Log of Fe/H number abundance relative to solar (2)log(Sun)meta.idfloato_[Fe/H]Number of lines used to derive [Fe/H]meta.numberinte_[Fe/H]The {sigma}/N^0.5^ deviation of [Fe/H]log(Sun)stat.error;phys.abund.FefloatlogAl? Log of Al number abundance (1)phys.abundfloatnullable[Al/H]? Log of Al/H number abundance relative to solar (3)log(Sun)phys.abundfloatnullableo_[Al/H]? Number of lines used to derive [Al/H]meta.numberintnullablee_[Al/H]? The {sigma}/N^0.5^ deviation of [Al/H]log(Sun)stat.error;phys.abundfloatnullableSimbadSimbad column added by the CDSchar_RAPositions from Simbad and van Leeuven et al. 2000, Cat. J/A+A/360/472 for 6 objects not in Simbad (right ascension part)degpos.eq.ra;meta.main_DEPositions from Simbad and van Leeuven et al. 2000, Cat. J/A+A/360/472 for 6 objects not in Simbad (declination part)degpos.eq.dec;meta.main