J/A+A/616/A112ivo://CDS.VizieR/J/A+A/616/A112doi:10.26093/cds/vizier.36160112CDSSmiljanic R.Donati P.Bragaglia A.Lemasle B.Romano D.2018-09-27T11:58:10Z2018-08-27T08:00:18ZCDS support team

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

cds-question@unistra.fropen-star-clustersvariable-starslate-type-starschemical-abundancesRecent observational results have demonstrated an increase in the surface Na abundance that correlates with stellar mass for red giants between 2 and 3M_{sun}_. This trend supports evolutionary mixing processes as the explanation for Na overabundances seen in some red giants. In this same mass range, the surface Al abundance was shown to be constant. Our main aim was to extend the investigation of the Na and Al surface abundances to giants more massive than 3M_{sun}_. We sought to establish accurately whether the Na abundances keep increasing with stellar mass or a plateau is reached. In addition, we investigated whether mixing can affect the surface abundance of Al in giants more massive than 3M_{sun}_. We obtained new high-resolution spectra of 20 giants in the field of 10 open clusters; 17 of these stars were found to be members of 9 clusters. The giants have masses between 2.5M_{sun}_ and 5.6M_{sun}_. A model atmosphere analysis was performed and abundances of up to 22 elements were derived using equivalent widths. Additionally, abundances of C, N, and O were determined using spectrum synthesis. The abundances of Na and Al were corrected for non-local thermodynamic equilibrium (non-LTE) effects. Moreover, to extend the mass range of our sample, we collected from the literature high-quality C, N, O, and Na abundances of 32 Galactic Cepheids with accurate masses in the range between 3M_{sun}_ and 14M_{sun}_. The surface abundances of C, N, O, Na, and Al were compared to predictions of stellar evolution models with and without the inclusion of rotation-induced mixing. The surface abundances of most giants and Cepheids of the sample can be explained by models without rotation. For giants above ~2.5M_{sun}_, the Na abundances reach a plateau level of about [Na/Fe]~0.20-0.25dex (in non-LTE). This is true for both Cepheids and giants in open clusters. Regarding Al, the non-LTE [Al/Fe] ratios are mostly close to solar and suggest that Al is not affected by the first dredge-up up to ~5.0M_{sun}_. Our results support previous works that found models with rotation to overestimate the mixing effects in intermediate-mass stars.2018A&A...616A.112Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/616/A112CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/616/A112https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/616/A112http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/616/A112https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/616/A112https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/616/A112http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/616/A112GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/616/A112/stars (List of studied stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/616/A112/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/616/A112/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/616/A112/stars?GETtext/xml+votable180.050000true305.833041741.6961750.0055555555555555566/1582 1930 2942 3230 3605 6760 6762 14697 23410 24522 30635https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/616/A112?format=asciidefaultJ/A+A/616/A112/starsList of studied starsSNameSimbad namemeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarIdentifier of the star (1)meta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainJ/A+A/616/A112/table5Atmospheric parametersTeffEffective temperatureKphys.temperature.effectiveintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarIdentifier of the starmeta.id;meta.mainchare_TeffError of the Teff measurementKstat.error;phys.temperature.effectiveintloggLogarithm of the surface gravitylog(cm.s**-2)phys.gravityfloate_loggError of the logg measurementlog(cm.s**-2)stat.errorfloat[Fe/H]Metallicity (1)log(Sun)phys.abund.Zfloate_[Fe/H]Error of the [Fe/H] measurementlog(Sun)stat.error;phys.abund.FefloatXiMicroturbulencekm/sphys.veloc.microTurbfloate_XiError of the Xi measurementkm/sstat.errorfloatJ/A+A/616/A112/tablea1Abundances of other elementsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarIdentifier of the starmeta.id;meta.mainchar[FeI/H]? Abundance of FeI (1)log(Sun)phys.abundfloatnullables_[FeI/H]? Dispersion of [FeI/H]log(Sun)instr.dispersionfloatnullableo_[FeI/H]? Number of lines used for [FeI/H]meta.numberintnullable[FeII/H]? Abundance of FeII (1)log(Sun)phys.abundfloatnullables_[FeII/H]? Dispersion of [FeII/H]log(Sun)instr.dispersionfloatnullableo_[FeII/H]? Number of lines used for [FeII/H]meta.numberintnullable[AlI/Fe]? Abundance of AlI (1)log(Sun)phys.abundfloatnullables_[AlI/Fe]? Dispersion of [AlI/Fe]log(Sun)instr.dispersionfloatnullableo_[AlI/Fe]? Number of lines used for [AlI/Fe]meta.numberintnullable[BaII/Fe]? Abundance of BaII (1)log(Sun)phys.abundfloatnullables_[BaII/Fe]? Dispersion of [BaII/Fe]log(Sun)instr.dispersionfloatnullableo_[BaII/Fe]? Number of lines used for [BaII/Fe]meta.numberintnullable[CaI/Fe]? Abundance of CaI (1)log(Sun)phys.abundfloatnullables_[CaI/Fe]? Dispersion of [CaI/Fe]log(Sun)instr.dispersionfloatnullableo_[CaI/Fe]? Number of lines used for [CaI/Fe]meta.numberintnullable[CeII/Fe]? Abundance of CeII (1)log(Sun)phys.abundfloatnullables_[CeII/Fe]? Dispersion of [CeII/Fe]log(Sun)instr.dispersionfloatnullableo_[CeII/Fe]? Number of lines used for [CeII/Fe]meta.numberintnullable[CoI/Fe]? Abundance of CoI (1)log(Sun)phys.abundfloatnullables_[CoI/Fe]? Dispersion of [CoI/Fe]log(Sun)instr.dispersionfloatnullableo_[CoI/Fe]? Number of lines used for [CoI/Fe]meta.numberintnullable[CrI/Fe]? Abundance of CrI (1)log(Sun)phys.abundfloatnullables_[CrI/Fe]? Dispersion of [CrI/Fe]log(Sun)instr.dispersionfloatnullableo_[CrI/Fe]? Number of lines used for [CrI/Fe]meta.numberintnullable[CrII/Fe]? Abundance of CrII (1)log(Sun)phys.abundfloatnullables_[CrII/Fe]? Dispersion of [CrII/Fe]log(Sun)instr.dispersionfloatnullableo_[CrII/Fe]? Number of lines used for [CrII/Fe]meta.numberintnullable[CuI/Fe]? Abundance of CuI (1)log(Sun)phys.abundfloatnullables_[CuI/Fe]? Dispersion of [CuI/Fe]log(Sun)instr.dispersionfloatnullableo_[CuI/Fe]? Number of lines used for [CuI/Fe]meta.numberintnullable[EuII/Fe]? Abundance of EuII (1)log(Sun)phys.abundfloatnullables_[EuII/Fe]? Dispersion of [EuII/Fe]log(Sun)instr.dispersionfloatnullableo_[EuII/Fe]? Number of lines used for [EuII/Fe]meta.numberintnullable[LaII/Fe]? Abundance of LaII (1)log(Sun)phys.abundfloatnullables_[LaII/Fe]? Dispersion of [LaII/Fe]log(Sun)instr.dispersionfloatnullableo_[LaII/Fe]? Number of lines used for [LaII/Fe]meta.numberintnullable[MgI/Fe]? Abundance of MgI (1)log(Sun)phys.abundfloatnullables_[MgI/Fe]? Dispersion of [MgI/Fe]log(Sun)instr.dispersionfloatnullableo_[MgI/Fe]? Number of lines used for [MgI/Fe]meta.numberintnullable[NaI/Fe]? Abundance of NaI (1)log(Sun)phys.abundfloatnullables_[NaI/Fe]? Dispersion of [NaI/Fe]log(Sun)instr.dispersionfloatnullableo_[NaI/Fe]? Number of lines used for [NaI/Fe]meta.numberintnullable[NiI/Fe]? Abundance of NiI (1)log(Sun)phys.abundfloatnullables_[NiI/Fe]? Dispersion of [NiI/Fe]log(Sun)instr.dispersionfloatnullableo_[NiI/Fe]? Number of lines used for [NiI/Fe]meta.numberintnullable[ScI/Fe]? Abundance of ScI (1)log(Sun)phys.abundfloatnullables_[ScI/Fe]? Dispersion of [ScI/Fe]log(Sun)instr.dispersionfloatnullableo_[ScI/Fe]? Number of lines used for [ScI/Fe]meta.numberintnullable[ScII/Fe]? Abundance of ScII (1)log(Sun)phys.abundfloatnullables_[ScII/Fe]? Dispersion of [ScII/Fe]log(Sun)instr.dispersionfloatnullableo_[ScII/Fe]? Number of lines used for [ScII/Fe]meta.numberintnullable[SI/Fe]? Abundance of SI (1)log(Sun)phys.abundfloatnullables_[SI/Fe]? Dispersion of [SI/Fe]log(Sun)phys.abundfloatnullableo_[SI/Fe]? Number of lines used for [SI/Fe]phys.abundintnullable[SiI/Fe]? Abundance of SiI (1)log(Sun)phys.abundfloatnullables_[SiI/Fe]? Dispersion of [SiI/Fe]log(Sun)instr.dispersionfloatnullableo_[SiI/Fe]? Number of lines used for [SiI/Fe]meta.numberintnullable[SiII/Fe]? Abundance of SiII (1)log(Sun)phys.abundfloatnullables_[SiII/Fe]? Dispersion of [SiII/Fe]log(Sun)instr.dispersionfloatnullableo_[SiII/Fe]? Number of lines used for [SiII/Fe]meta.numberintnullable[SrI/Fe]? Abundance of SrI (1)log(Sun)phys.abundfloatnullables_[SrI/Fe]? Dispersion of [SrI/Fe]log(Sun)instr.dispersionfloatnullableo_[SrI/Fe]? Number of lines used for [SrI/Fe]meta.numberintnullable[TiI/Fe]? Abundance of TiI (1)log(Sun)phys.abundfloatnullables_[TiI/Fe]? Dispersion of [TiI/Fe]log(Sun)instr.dispersionfloatnullableo_[TiI/Fe]? Number of lines used for [TiI/Fe]meta.numberintnullable[TiII/Fe]? Abundance of TiII (1)log(Sun)phys.abundfloatnullables_[TiII/Fe]? Dispersion of [TiII/Fe]log(Sun)instr.dispersionfloatnullableo_[TiII/Fe]? Number of lines used for [TiII/Fe]meta.numberintnullable[VI/Fe]? Abundance of VI (1)log(Sun)phys.abundfloatnullables_[VI/Fe]? Dispersion of [VI/Fe]log(Sun)phys.abundfloatnullableo_[VI/Fe]? Number of lines used for [VI/Fe]phys.abundintnullable[YII/Fe]? Abundance of YII (1)log(Sun)phys.abundfloatnullables_[YII/Fe]? Dispersion of [YII/Fe]log(Sun)instr.dispersionfloatnullableo_[YII/Fe]? Number of lines used for [YII/Fe]meta.numberintnullable[ZnI/Fe]? Abundance of ZnI (1)log(Sun)phys.abundfloatnullables_[ZnI/Fe]? Dispersion of [ZnI/Fe]log(Sun)instr.dispersionfloatnullableo_[ZnI/Fe]? Number of lines used for [ZnI/Fe]meta.numberintnullable[ZrI/Fe]? Abundance of ZrI (1)log(Sun)phys.abundfloatnullables_[ZrI/Fe]? Dispersion of [ZrI/Fe]log(Sun)instr.dispersionfloatnullableo_[ZrI/Fe]? Number of lines used for [ZrI/Fe]meta.numberintnullable[ZrII/Fe]? Abundance of ZrII (1)log(Sun)phys.abundfloatnullables_[ZrII/Fe]? Dispersion of [ZrII/Fe]log(Sun)instr.dispersionfloatnullableo_[ZrII/Fe]? Number of lines used for [ZrII/Fe]meta.numberintnullableJ/A+A/616/A112/table6Abundances of C, N, and OrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarIdentifier of the starmeta.id;meta.mainchar[C/Fe]? Abundance ratio of carbon (1)log(Sun)phys.abund;arith.ratiofloatnullablef_[C/Fe][0/1]? Quality flag of [C/Fe] (2)meta.codeintnullable[N/Fe]? Abundance ratio of nitrogen (1)log(Sun)phys.abund;arith.ratiofloatnullablef_[N/Fe][0/1]? Quality flag of [N/Fe] (2)meta.codeintnullable[O/Fe]? Abundance ratio of oxygen (1)log(Sun)phys.abundfloatnullablef_[O/Fe][0/1]? Quality flag of [O/Fe] (2)meta.codeintnullable