J/ApJ/797/44ivo://CDS.VizieR/J/ApJ/797/44doi:10.26093/cds/vizier.17970044CDSFishlock C.K.Karakas A.I.Lugaro M.Yong D.2017-09-18T12:52:50Z2017-08-22T13:17:03ZCDS support team

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

cds-question@unistra.frgiant-starsstellar-masseseffective-temperaturechemical-abundancesstellar-evolutionary-modelsWe present stellar evolutionary tracks and nucleosynthetic predictions for a grid of stellar models of low- and intermediate-mass asymptotic giant branch (AGB) stars at Z=0.001 ([Fe/H]=-1.2). The models cover an initial mass range from 1 M_{sun}_ to 7 M_{sun}_. Final surface abundances and stellar yields are calculated for all elements from hydrogen to bismuth as well as isotopes up to the iron group. We present the first study of neutron-capture nucleosynthesis in intermediate-mass AGB models, including a super-AGB model, of [Fe/H]=-1.2. We examine in detail a low-mass AGB model of 2 M_{sun}_ where the ^13^C({alpha},n)^16^O reaction is the main source of neutrons. We also examine an intermediate-mass AGB model of 5 M_{sun}_ where intershell temperatures are high enough to activate the ^22^Ne neutron source, which produces high neutron densities up to ~10^14^ n/cm^3^. Hot bottom burning is activated in models with M>=3 M_{sun}_. With the 3 M_{sun}_ model, we investigate the effect of varying the extent in mass of the region where protons are mixed from the envelope into the intershell at the deepest extent of each third dredge-up. We compare the results of the low-mass models to three post-AGB stars with a metallicity of [Fe/H]~-1.2. The composition is a good match to the predicted neutron-capture abundances except for Pb and we confirm that the observed Pb abundances are lower than what is calculated by AGB models.2014ApJ...797...44Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/797/44CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/ApJ/696/797 : Evolution and yields of low-mass AGB starsJ/MNRAS/403/1413 : Updated stellar yields from AGB models (Karakas, 2010)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/797/44https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/797/44http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/797/44https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/797/44https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/797/44http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/797/44GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/ApJ/797/44/table2Model structural properties for each thermal pulserecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMass[1.0/7.0] Initial model mass (G1)solMassphys.mass;meta.modelledfloatPulse[1/135] Pulse numbermeta.numberintMcoreCore masssolMassphys.massdoubleMcshMaximum mass of intershell convection zonesolMassphys.massdoubletcshDuration of intershell convectionyrtime.durationdoubleMDredMass dredged into envelopesolMassphys.massdoublelambThird dredge-up efficiencystat.paramdoubleTHeshMaximum He-shell temperatureKphys.temperaturedoubleTbceMaximum temperature at base of convective envelope (2)Kphys.temperaturedoubleTHshMaximum H-shell temperature (2)Kphys.temperaturedoubletipInterpulse periodyrtime.perioddoubleMtotTotal masssolMassphys.massdoubleLmaxMaximum radiated luminosity (2)solLumphys.luminositydoubleLHemaxMaximum He-luminosity during a thermal pulsesolLumphys.luminositydoubleRmaxMaximum radius (2)solRadphys.size.radius;stat.maxdoublemBolBolometric magnitudemagphot.mag.boldoubleTeffEffective temperature at maximum radiusKphys.temperature.effectivedoubleJ/ApJ/797/44/table8The isotopic yieldsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMass[1.0/7.0] Initial model mass (G1)solMassphys.mass;meta.modelledfloatEl? Element identifiermeta.id;phys.atmol.elementcharZ[0/84]? Atomic numbermeta.id;meta.mainintnullableSpecies? Species identifiermeta.idcharA[1/70]? Atomic mass numberphys.atmol.numberintnullableMNet stellar yield (2)solMassphys.composition.yield;src.netdoubleMlostAmount lost from stellar windsolMassphys.massdoubleM0Total mass expelled (3)solMassphys.massdouble<X>Average mass fraction in the windphys.mass;stat.meandoubleX0Initial mass fractionphys.mass;arith.ratiodoublefProduction factor (4)arith.factordoubleJ/ApJ/797/44/table9The elemental yieldsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMass[1.0/7.0] Initial model mass (G1)solMassphys.mass;meta.modelledfloatEl? Element identifiermeta.id;phys.atmol.elementcharZ[0/84]? Atomic numbermeta.id;meta.mainintnullableSpecies? Species identifiermeta.idcharA[1/70]? Atomic mass numberphys.atmol.numberintnullableMNet stellar yield (2)solMassphys.composition.yield;src.netdoubleMlostAmount lost from stellar windsolMassphys.massdoubleM0Total mass expelled (3)solMassphys.massdouble<X>Average mass fraction in the windphys.mass;stat.meandoubleX0Initial mass fractionphys.mass;arith.ratiodoublefProduction factor (4)arith.factordoubleJ/ApJ/797/44/table10The final surface abundances for each isotoperecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSpeciesSpecies identifiermeta.id;meta.maincharA[1/70] Atomic mass numberphys.atmol.numberintAbd-1Surface abundance in 1 solar mass model (1)phys.abunddoubleAbd-1.25Surface abundance in 1.25 solar mass model (1)phys.abunddoubleAbd-1.5Surface abundance in 1.5 solar mass model (1)phys.abunddoubleAbd-2Surface abundance in 2 solar mass model (1)phys.abunddoubleAbd-2.25Surface abundance in 2.25 solar mass model (1)phys.abunddoubleAbd-2.5Surface abundance in 2.5 solar mass model (1)phys.abunddoubleAbd-2.75Surface abundance in 2.75 solar mass model (1)phys.abunddoubleAbd-3Surface abundance in 3 solar mass model (1)phys.abunddoubleAbd-3.25Surface abundance in 3.25 solar mass model (1)phys.abunddoubleAbd-3.5Surface abundance in 3.5 solar mass model (1)phys.abunddoubleAbd-4Surface abundance in 4 solar mass model (1)phys.abunddoubleAbd-4.5Surface abundance in 4.5 solar mass model (1)phys.abunddoubleAbd-5Surface abundance in 5 solar mass model (1)phys.abunddoubleAbd-5.5Surface abundance in 5.5 solar mass model (1)phys.abunddoubleAbd-6Surface abundance in 6 solar mass model (1)phys.abunddoubleAbd-7Surface abundance in 7 solar mass model (1)phys.abunddoubleJ/ApJ/797/44/table11The final surface abundance of each elementXMass fractionphys.mass;arith.ratiodoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMass[1.0/7.0] Initial model mass (G1)solMassphys.mass;meta.modelledfloatElElement identifiermeta.id;phys.atmol.elementcharZ[1/84] Atomic numbermeta.id;meta.mainintlogeLog abundance (2)phys.abunddouble[X/H]Log abundance relative to hydrogen (3)phys.abund;arith.zpdouble[X/Fe]Log abundance relative to iron (3)phys.abunddouble[X/O]Log abundance relative to oxygen (3)phys.abunddouble