J/ApJ/701/1053ivo://CDS.VizieR/J/ApJ/701/1053doi:10.26093/cds/vizier.17011053CDSCohen J.G.Huang W.2018-01-02T13:43:11Z2011-10-04T14:59:13ZCDS support team

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

cds-question@unistra.frline-intensitiesgiant-starsgalaxiesWe present an abundance analysis based on high-resolution spectra of eight stars selected to span the full range in metallicity in the Draco dwarf spheroidal (dSph) galaxy. We find that [Fe/H] for the sample stars ranges from -1.5 to -3.0dex. Combining our sample with previously published work for a total of 14 luminous Draco giants, we show that the abundance ratios [Na/Fe], [Mg/Fe], and [Si/Fe] for the Draco giants overlap those of Galactic halo giants at the lowest [Fe/H] probed, but are significantly lower for the higher Fe-metallicity Draco stars. Using a toy model we compare the behavior of the abundance ratios within the sample of Draco giants with those from the literature of Galactic globular clusters, and the Carina and Sgr dSph galaxies.2009ApJ...701.1053Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/701/1053CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/136/1921 : Variable stars of Draco dSph (Kinemuchi+, 2008)J/MNRAS/375/831 : Draco MegaCam, INT and HST photometry (Segall+, 2007)J/A+A/442/165 : IJKs photometry of late-type stars in Draco dSph (Cioni+,J/ApJS/145/245 : SDSS stars in Draco dwarf spheroidal galaxy (Rave+, 2003)J/AJ/124/3222 : VI photometry of Draco and UMi galaxies (Bellazzini+, 2002)J/MNRAS/330/792 : Radial velocity in Draco (Kleyna+, 2002)J/AJ/123/2511 : RV photometry of Draco dwarf spheroidal galaxy (Piatek+,https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/701/1053https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/701/1053http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/701/1053https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/701/1053https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/701/1053http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/701/1053GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/701/1053/stars (The sample of stars in the Draco dSph and their stellar parameters (table 1 and 2 of the paper))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/701/1053/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/701/1053/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/701/1053/stars?GETtext/xml+votable180.050000true260.142458357.89226110.0055555555555555566/10182 10183https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/701/1053?format=asciidefaultJ/ApJ/701/1053/starsThe sample of stars in the Draco dSph and their stellar parameters (table 1 and 2 of the paper)SimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar identification (1)meta.id;meta.maincharprimaryRAJ2000Hour of right ascension (J2000) (1)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.mainVmagSDSS V-band magnitude (2)magphot.mag;em.opt.VfloatImagSDSS I-band magnitude (2)magphot.mag;em.opt.IfloatDateObservation date in "MM/YYYY" formattime.epoch;obscharn_Date[b] b: the 2hr exposure from 06/2005 is not as good and was not used.meta.notecharExpExposure timestime.duration;obs.exposureintTeffEffective temperature from the spectraKphys.temperature.effectiveintloggSurface gravity from the spectralog(cm.s**-2)phys.gravityfloatVtTurbulent velocity {xi}km/sphys.veloc.microTurbfloatHRVHeliocentric radial velocitykm/sspect.dopplerVeloc;pos.heliocentricfloatJ/ApJ/701/1053/table3Equivalent Widths for eight stars in the Draco dSphrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar identificationmeta.id;meta.maincharWaveWavelength in Angstroms0.1nmem.wlfloatIonSpecies identificationphys.atmol.ionStagecharExPotExcitation potentialeVphys.atmol.excitationfloatlog(gf)Log of the oscillator strengthphys.atmol.oscStrengthfloatl_EW[<=] Limit flag on EWmeta.code.error;spect.line.eqWidthcharEW? Equivalent width (in m{AA})1e-13mspect.line.eqWidthfloatnullableu_EW[a] a: indicates EW is very uncertain, could be an upper limit (concerns XI-2)meta.code.error;spect.line.eqWidthchar