J/A+A/580/A129ivo://CDS.VizieR/J/A+A/580/A129doi:10.26093/cds/vizier.35800129CDSSkuladottir A.Andrievsky S.M.Tolstoy E.Hill V.Salvadori S.,Korotin S.A.Pettini M.2017-08-07T11:25:44Z2015-12-11T08:06:03ZCDS support team

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

cds-question@unistra.frgalaxieschemical-abundancesIn Galactic halo stars, sulphur has been shown to behave like other {alpha}-elements, but until now, no comprehensive studies have been done on this element in stars of other galaxies. Here, we use high-resolution ESO VLT/FLAMES/GIRAFFE spectra to determine sulphur abundances for 85 stars in the Sculptor dwarf spheroidal galaxy, covering the metallicity range -2.5<=[Fe/H]<=-0.8. The abundances are derived from the SI triplet at 9213, 9228, and 9238{AA}. These lines have been shown to be sensitive to departure from local thermodynamic equilibrium, i.e. NLTE effects. Therefore, we present new NLTE corrections for a grid of stellar parameters covering those of the target stars. The NLTE-corrected sulphur abundances in Sculptor show the same behaviour as other {alpha}-elements in that galaxy (such as Mg, Si, and Ca). At lower metallicities ([Fe/H]<~-2) the abundances are consistent with a plateau at [S/Fe]=~+0.16, similar to what is observed in the Galactic halo, [S/Fe]=~+0.2. With increasing [Fe/H], the [S/Fe] ratio declines, reaching negative values at [Fe/H]>-1.5. The sample also shows an increase in [S/Mg] with [Fe/H], most probably because of enrichment from Type Ia supernovae.2015A&A...580A.129Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/580/A129CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/574/A129 : The First CEMP star in the Sculptor dSph (Skuladottir+, 2015)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/580/A129https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/580/A129http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/580/A129https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/580/A129https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/580/A129http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/580/A129GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/580/A129/tablea1 (Positions and stellar parameters of the target stars in Sculptor, with Fe, Mg, and S abundance measurements, including NLTE corrections for S)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/580/A129/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/580/A129/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/580/A129/tablea1?GETtext/xml+votable180.050000true15.1418333-33.65127780.0055555555555555566/35549 35720https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/580/A129?format=asciidefaultJ/A+A/580/A129/tablea1Positions and stellar parameters of the target stars in Sculptor, with Fe, Mg, and S abundance measurements, including NLTE corrections for SNSNumber of spectrameta.numberintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar name (ETNNNN)meta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000declination (J2000)pos.eq.dec;meta.mainTeffEffective temperatureKphys.temperature.effectiveintloggSurface gravitylog(cm.s**-2)phys.gravityfloatvtTrubulence velocitykm/sphys.velocfloatRVRadial velocitykm/sphys.veloc;pos.heliocentricfloatS/NSignal-to-noise ratiostat.snrint[Fe/H]Metallicityphys.abund.Zfloate_[Fe/H]rms uncertainty on [Fe/H]stat.error;phys.abund.Fefloat[Mg/H]? Abundance [Mg/H]phys.abundfloatnullablee_[Mg/H]? rms uncertainty on [Mg/H]stat.error;phys.abundfloatnullablelogeps(S)Sulfur abundance (LTE)phys.abundfloatdnoiseFinal error of the linestat.errorfloatDNLTENLTE correctionarith.factorfloat[S/Fe]Abundance [S/Fe] (NLTE)phys.abundfloate_[S/Fe]rms uncertainty on [S/Fe]stat.error;phys.abundfloat[S/Mg]? Abundance [S/Mg] (NLTE)phys.abundfloatnullablee_[S/Mg]? rms uncertainty on [S/Mg]stat.errorfloatnullableSimbadSimbad column added by the CDSmeta.ref.urlcharJ/A+A/580/A129/tablea2Abundances for individual sulphur lines with their associated measurement errors and NLTE correctionsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar namemeta.id;meta.maincharlogeps(S)1First line (9213{AA}) sulfur abundancephys.abundfloatdnoise1First line (9213{AA}) final errorstat.errorfloatDNLTE1First line (9213{AA}) NLTE correctionarith.factorfloatlogeps(S)2Second line (9213{AA}) sulfur abundancephys.abundfloatdnoise2Second line (9228{AA}) final errorstat.errorfloatDNLTE2Second line (9228{AA}) NLTE correctionarith.factorfloatlogeps(S)3? Third line (9238{AA}) sulfur abundancephys.abundfloatnullablednoise3? Third line (9238{AA}) final errorstat.errorfloatnullableDNLTE3? Third line (9238{AA}) NLTE correctionarith.factorfloatnullable