J/A+A/585/A64ivo://CDS.VizieR/J/A+A/585/A64doi:10.26093/cds/vizier.35850064CDSSharma K.PrugnielP.Singh H.P.2017-06-28T06:58:34Z2015-12-18T08:55:18ZCDS support team

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

cds-question@unistra.frstellar-atmospheresstar-atlaseseffective-temperaturemetallicityThe full spectrum fitting of stellar spectra against a library of empirical spectra is a well-established approach to measure the atmospheric parameters of FGK stars with a high internal consistency. Extending it towards cooler stars still remains a challenge. We address this question by improving the MILES interpolator (Prugniel et al., 2011, Cat. J/A+A/531/A165; hereafter PVK) in the low effective temperature regime (Teff<4800K). We measure the biases of the determined parameters with respect to our updated compilation of parameters. After correcting some systematic effects, we compute a new interpolator that we finally use to redetermine the atmospheric parameters homogeneously and assess the biases. Based on an updated literature compilation, we determine Teff in a more accurate and unbiased manner compared to those determined with the original interpolator. The validity range is extended downwards to about Teff=2900K compared to 3500K previously. The measured parameters are restricted to the current sub sample of MILES, and we have shown that they are generally more reliable than those presented in PVK. But the small discontinuity between the PVK and new measurements is significant, in particular for Teff, and should be corrected if one needs to join the two series.2016A&A...585A..64Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/585/A64CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/531/A165 : MILES atmospheric parameters (Prugniel+, 2011)http://ulyss.univ-lyon1.fr/ : ULySS packagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/585/A64https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/585/A64http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/585/A64https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/585/A64https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/585/A64http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/585/A64GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/585/A64/table11Mean measured metallicities of the clustersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClusterName of the clustermeta.id.parentcharNstarNumber of stars studied from the clustermeta.numberint[Fe/H]Mean measured metallicityphys.abund.Z;stat.meanfloate_[Fe/H]Mean errors of measured metallicitystat.error;phys.abund.Fefloats_[Fe/H]? Dispersion of measured metallicities for the stars from the same cluster.instr.dispersionfloatnullabled[Fe/H]Difference between the compiled and mean measured metallicityobs.param;arith.difffloatJ/A+A/585/A64/table1Literature compilation and measured parameters keeping the metallicity fixed at the cluster metallicity value for the cluster starsSimbadNameSimbad column added by the CDSmeta.idcharMilesInternal number in MILESmeta.idintprimary[Fe/H]Metallicity (this work) (2)phys.abund.ZfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameDesignation of the starmeta.id;phys.atmol.configurationcharmoreindicates informations in tables 7 and/or 10meta.ref.urlcharTeffCCompiled effective temperatureKphys.temperature.effectiveintloggCCompiled log of surface gravitylog(cm.s**-2)phys.gravityfloat[Fe/H]C? Compiled metallicityphys.abund.FefloatnullableFlagC[0/2] Compilation quality flag (1)meta.code.errorintTeffEffective temperature (this work)Kphys.temperature.effectiveinte_TeffError on Teff (this work)Kstat.error;phys.temperature.effectiveintloggLog of the surface gravity (this work)log(cm.s**-2)phys.gravityfloate_loggError on logg (this work)log(cm.s**-2)stat.errorfloate_[Fe/H]? Error on [Fe/H] (this work)stat.error;phys.abund.Fefloatnullableu_[Fe/H]Uncertainty flag on [Fe/H] (3)meta.code.error;phys.abund.FecharFlagW[0/2] Wavelength consistency flag (4)meta.code.errorintFlagS[0/2] Stability flag (5)meta.code.errorintJ/A+A/585/A64/table7Remarkable stars discussed in the paperMilesInternal MILES numbermeta.idintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar identificationmeta.id;meta.maincharJ/A+A/585/A64/table10Derived parameters of cluster stars leaving the metallicity freerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordinte_[Fe/H]Error on [Fe/H]stat.error;phys.abund.FefloatNameDesignation of the cluster starmeta.id;phys.atmol.configurationcharMilesInternal MILES numbermeta.idint[Fe/H]lCluster [Fe/H] adopted from literaturephys.abund.FefloatTeffDerived effective temperatureKphys.temperature.effectiveintloggDerived log of surface gravitylog(cm.s**-2)phys.gravityfloat[Fe/H]Derived [Fe/H]phys.abund.Fefloat