J/A+A/604/A129ivo://CDS.VizieR/J/A+A/604/A129doi:10.26093/cds/vizier.36040129CDSMashonkina L.Jablonka P.Pakhomov YuSitnova TNorth P.2017-09-04T08:07:59Z2017-08-25T08:01:46ZCDS support team

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

cds-question@unistra.frgiant-starschemically-peculiar-starsspectroscopychemical-abundancesastronomical-modelsstellar-atmospheresgalaxiesWe present a homogeneous set of accurate atmospheric parameters for a complete sample of very and extremely metal-poor stars in the dwarf spheroidal galaxies (dSphs) Sculptor, Ursa Minor, Sextans, Fornax, Bootes I, Ursa Major II, and Leo IV. We also deliver a Milky Way (MW) comparison sample of giant stars covering the -4<[Fe/H]<-1.7 metallicity range. We show that, in the [Fe/H]=>-3.7 regime, the non-local thermodynamic equilibrium (NLTE) calculations with non-spectroscopic effective temperature (Teff) and surface gravity (log g) based on the photometric methods and known distance provide consistent abundances of the FeI and FeII lines. This justifies the FeI/FeII ionisation equilibrium method to determine log g for the MW halo giants with unknown distance. The atmospheric parameters of the dSphs and MW stars were checked with independent methods. In the [Fe/H]>-3.5 regime, the TiI/TiII ionisation equilibrium is fulfilled in the NLTE calculations. In the logg-Teff plane, all the stars sit on the giant branch of the evolutionary tracks corresponding to [Fe/H]=-2 to -4, in line with their metallicities. For some of the most metal-poor stars of our sample, we hardly achieve consistent NLTE abundances from the two ionisation stages for both iron and titanium. We suggest that this is a consequence of the uncertainty in the Teff-colour relation at those metallicities. The results of these work provide the base for a detailed abundance analysis presented in a companion paper.2017A&A...604A.129Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/604/A129CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/144/168 : Spectroscopy of Scl 1019417 and UMi 20103 (Kirby+, 2012)J/ApJ/802/93 : Chemical abundance analysis of 5 stars in SculptorJ/Apj/719/931 : Chemical evolution of the UMi dSph (Cohen+, 2010)J/ApJ/763/61 : Abundances of 7 red giant members of BootesI (Gilmore+, 2013)J/ApJ/711/350 : Metal-poor giant Boo-1137 abundances (Norris+, 2010)J/ApJ/826/110 : Boo-127 and Boo-980 high-resolution spectra (Frebel+, 2016)J/ApJ/708/560 : Spectroscopy of UMa II and Coma Ber (Frebel+, 2010)J/ApJ/778/56 : Hamburg/ESO Survey extremely metal-poor stars (Cohen+, 2013)J/A+A/516/A46 : HE 2327-5642 abundance analysis (Mashonkina+, 2010)J/A+A/569/A43 : HE 2252-4225 abundance analysis (Mashonkina+, 2014)J/A+A/608/A89 : Formation of MW halo and its dw satellites. II.https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/604/A129https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/604/A129http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/604/A129https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/604/A129https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/604/A129http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/604/A129GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/604/A129/tablea2 (Iron and titanium NLTE abundances for the investigated sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/604/A129/tablea2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/604/A129/tablea2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/604/A129/tablea2?GETtext/xml+votable180.050000true15.0539833-33.70107220.0055555555555555566/7416-7417 8744-8745 8766 11690-11691 12032 16821 16893 17035 17081 17099 17419 17578 17938 18086 18425 25719 25991 26347 26457 26980 27207 27218 34775 35477 35549 35551 35720 35969 36135 36691 44208 44797 46155 46490https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/604/A129?format=asciiOpticaldefaultJ/A+A/604/A129/tablea1Line dataElAtomphys.atmol.elementcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIonIonphys.atmol.ionStagecharlambdaWavelength0.1nmem.wlfloatEexcExcitation energyeVphys.atmol.excitationfloatloggfAdopted gf-valuephys.absorption.coefffloatG6/NHvan der Waals damping constant log(G6/NH) at 10000Krad.s**-1.cm**-3phys.damping;arith.zpfloatJ/A+A/604/A129/tablea2Iron and titanium NLTE abundances for the investigated sampleSimbadNameSimbad column added by the CDSmeta.idcharIDStar IDmeta.id;meta.maincharo_FeIINumber of FeII linesmeta.numberinto_FeINumber of FeI linesmeta.numberintepsFeIFeI NLTE abundance (log eps(H)=12)phys.abundfloate_FeIFeI NLTE abundance dispersion (sigma(log eps))stat.errorfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTeffEffective temperatureKphys.temperature.effectiveintloggSurface gravitylog(cm.s**-2)phys.gravityfloat[Fe/H]Metallicityphys.abund.ZfloatVtMicroturbulent velocitykm/sphys.velocfloatepsFeIIFeII NLTE abundance (log eps(H)=12)phys.abundfloate_FeIIFeII NLTE abundance dispersion (sigma(log eps))stat.errorfloatepsTiI? TiI NLTE abundance (log eps(H)=12)phys.abundfloatnullablee_TiI? TiI NLTE abundance dispersion (sigma(log eps))stat.errorfloatnullableo_TiI? Number of TiI linesmeta.numberintnullableepsTiIITiII NLTE abundance (log eps(H)=12)phys.abundfloate_TiIITiII NLTE abundance dispersion (sigma(log eps))stat.errorfloato_TiIINumber of TiII linesmeta.numberint_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main