J/ApJ/682/1217ivo://CDS.VizieR/J/ApJ/682/1217doi:10.26093/cds/vizier.16821217CDSKirby E.N.Guhathakurta P.Sneden C.2010-12-22T20:54:55Z2010-12-08T14:41:42ZCDS support team

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

cds-question@unistra.frglobular-star-clustersmetallicityinfrared-photometryvisible-astronomybroad-band-photometrygiant-starsspectroscopyWe present a technique that applies spectral synthesis to medium-resolution spectroscopy (MRS; R~6000) in the red (6300{AA}<{lambda}<9100{AA}) to measure [Fe/H] and [{alpha}/Fe] of individual red giant stars over a wide metallicity range. We apply our technique to 264 red giant stars in seven Galactic globular clusters and demonstrate that it reproduces the metallicities and {alpha}-enhancements derived from high-resolution spectroscopy (HRS). The MRS technique excludes the three CaII triplet lines and instead relies on a plethora of weaker lines. Unlike empirical metallicity estimators, such as the equivalent width of the CaII triplet, the synthetic method presented here is applicable over an arbitrarily wide metallicity range and is independent of assumptions about the {alpha}-enhancement.2008ApJ...682.1217Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/682/1217CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/248 : UBV photometry and proper motions in M13 (Kadla, 1966)J/A+A/505/117 : Abundances of red giants in 15 globular clusters (Carretta+,J/A+A/505/139 : Abundances of red giants in 17 globular clusters (Carretta+,J/A+A/486/941 : Abundances in M71 (NGC 6838) (Alves-Brito+, 2008)J/AJ/129/1607 : Equivalent widths of 4 RGB in NGC 7492 (Cohen+, 2005)J/PASP/117/37 : BVRI photometry in NGC 2419, Pal 4, and Pal 14 (Saha+, 2005)J/A+AS/144/227 : BV photometry of M71 (Geffert+, 2000)J/AJ/112/601 : UV photometry in M79 (Hill+ 1996)J/AJ/107/230 : BVRI CCD photometry of NGC 1904 (Alcaino+, 1994)J/A+AS/26/353 : UBV observations in globular NGC 1904 (Alcaino+, 1976)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/682/1217https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/682/1217http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/682/1217https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/682/1217https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/682/1217http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/682/1217GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/682/1217/table6 (Abundances for individual stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/682/1217/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/682/1217/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/682/1217/table6?GETtext/xml+votable180.050000true80.96375-24.5194440.0055555555555555566/6389 9436 12405 12531 12943 17121 21017https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/682/1217?format=asciiOpticalInfrareddefaultJ/ApJ/682/1217/table6Abundances for individual starsTeffEffective temperatureKphys.temperature.effectiveintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClusterCluster namemeta.id.parentcharBmag? B band magnitude (1)magphot.mag;em.opt.Bfloatnullablee_Bmag? Uncertainty in Bmag (1)magstat.error;phot.mag;em.opt.BfloatnullableVmagV band magnitude (1)magphot.mag;em.opt.Vfloate_VmagUncertainty in Vmag (1)magstat.error;phot.mag;em.opt.VfloatImag? I band magnitude (1)magphot.mag;em.opt.Ifloatnullablee_Imag? Uncertainty in Imag (1)magstat.error;phot.mag;em.opt.Ifloatnullablelog(g)Log of surface gravitylog(cm.s**-2)phys.gravityfloat[Fe/H]MMetallicity from Medium resolution spectroscopylog(Sun)meta.number;phys.abund.Zfloate_[Fe/H]MUncertainty in [Fe/H]Mlog(Sun)stat.error;phys.abund.Fefloat[a/Fe]M{alpha} enhancement from Medium resolution spectroscopylog(Sun)phys.abundfloate_[a/Fe]MUncertainty in [a/Fe]Mlog(Sun)stat.error;phys.abundfloat[Fe/H]H? Metallicity from High resolution spectroscopylog(Sun)meta.number;phys.abund.Zfloatnullablee_[Fe/H]H? Uncertainty in [Fe/H]Hlog(Sun)stat.error;phys.abund.Fefloatnullable[a/Fe]H? {alpha} enhancement from High resolution spectroscopy (2)log(Sun)phys.abundfloatnullablee_[a/Fe]H? Uncertainty in [a/Fe]Hlog(Sun)stat.error;phys.abundfloatnullableHRSautHigh resolution spectroscopy author's referencemeta.bib.authorcharBibCodeHigh resolution spectroscopy bibcodemeta.bib.bibcodecharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainJ/ApJ/682/1217/table4Line listrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength in Angstroms0.1nmem.wldoubleIonSpecies identification (1)meta.id;meta.mainfloatExPotExcitation potential (2)eVphys.atmol.excitationfloatlog(gf)Log of oscillator strength (3)phys.atmol.oscStrengthfloat