J/MNRAS/459/4299ivo://CDS.VizieR/J/MNRAS/459/4299doi:10.26093/cds/vizier.74594299CDSde Castro D.BPereira C.BRoig FJilinski EDrake N.AChavero C.,Sales Silva J.V2024-08-16T20:16:59Z2016-06-03T09:08:11ZCDS support team

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

cds-question@unistra.frpeculiar-variable-starschemical-abundancesIn this paper, we present an homogeneous analysis of photospheric abundances based on high-resolution spectroscopy of a sample of 182 barium stars and candidates. We determined atmospheric parameters, spectroscopic distances, stellar masses, ages, luminosities and scaleheight, radial velocities, abundances of the Na, Al, {alpha}-elements, iron-peak elements, and s-process elements Y, Zr, La, Ce, and Nd. We employed the local thermodynamic equilibrium model atmospheres of Kurucz and the spectral analysis code MOOG. We found that the metallicities, the temperatures and the surface gravities for barium stars cannot be represented by a single Gaussian distribution. The abundances of {alpha}-elements and iron peak elements are similar to those of field giants with the same metallicity. Sodium presents some degree of enrichment in more evolved stars that could be attributed to the NeNa cycle. As expected, the barium stars show overabundance of the elements created by the s-process. By measuring the mean heavy-element abundance pattern as given by the ratio [s/Fe], we found that the barium stars present several degrees of enrichment. We also obtained the [hs/ls] ratio by measuring the photospheric abundances of the Ba-peak and the Zr-peak elements. Our results indicated that the [s/Fe] and the [hs/ls] ratios are strongly anticorrelated with the metallicity. Our kinematical analysis showed that 90 per cent of the barium stars belong to the thin disc population. Based on their luminosities, none of the barium stars are luminous enough to be an asymptotic giant branch star, nor to become self-enriched in the s-process elements. Finally, we determined that the barium stars also follow an age-metallicity relation.2016MNRAS.459.4299Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/459/4299CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/326/722 : HIPPARCOS Ba stars (Mennessier+ 1997)J/AZh/79/909 : Chemical abundances in barium stars (Boyarchuk+, 2002)J/AZh/80/704 : Studies of classical barium stars (Antipova+, 2003)J/A+A/372/245 : Infrared properties of barium stars (Chen+, 2001)J/A+A/454/895 : Abundances of 26 barium stars. I. (Allen+, 2006)J/A+A/454/917 : Abundances of 26 barium stars. II. (Allen+, 2006)J/A+A/525/A63 : Abundances in Ba stars (Allen+, 2011)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/459/4299https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/459/4299http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/459/4299https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/459/4299https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/459/4299http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/459/4299GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/459/4299/sample (Basic informations (table1), atmospheric parameters (table3), abundances ratio (table7 and 8) and mass, distance, luminosity (table12) of the stuided stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/459/4299/sample?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/459/4299/sample?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/459/4299/sample?GETtext/xml+votable180.050000true173.6349417-9.33140.0055555555555555566/12289 12533 16989 17020 17049 17091 17705 17726 18497 18506 18543 18575 18659 19060 19271 19466 20740 20787 20997 21011 21029 21035 21136 21310 21690 21744 22023 22154 22214 22221 22233 22288 22328 22331 22462 22902 23122 23224 23657 24640 24844 25323 25455 25509 25574 25631 25647 25829 25835 25950 25984 26029 26630 26632 26852 27106 27491 29015 29117 29932 30300 30659 30730 30873 32784 32847 32980 33101 33185 33208 33837 33849 33919 34127 34131 34139 34216 34445 34462 34540 34659 34683 34870 34961 35286 35361 35549 35600 35759 36069 36189 36839 36841 36986 37500-37501 38061 38117 38364 38398 38525 38545 38604 38640 38711 38734 38748 38858 38882 38893 38996 39195 39342 39391 39425 39447 39499 39560 39766 39774 39977 40004 40271 40311 40742 40964 40999 41278-41279 41382 41453 41511 42004 42023 42915 43009 43301 43509 43542 43665 43685 43860 43912 43961 44389 44488 44686 44693 44899 45001 45045 45248 45346 45429 45461 45616 45695 45736 45900 46352 46790 46891 46994 47050 47071 47207 47247 47252 47329 47473 47522 47537 47629 47757 47794 47996 48516 48546 48800 49005https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/459/4299?format=asciidefaultJ/MNRAS/459/4299/sampleBasic informations (table1), atmospheric parameters (table3), abundances ratio (table7 and 8) and mass, distance, luminosity (table12) of the stuided starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar namemeta.id;meta.maincharprimaryYearYear of observationyrtime.epochintExpTimeExposure timestime.duration;obs.exposureintVmagV magnitudemagphot.mag;em.opt.VfloatSpTypeMK spectral Typesrc.spTypecharRefSource from which the star have been selected (G1)meta.bibcharMassStellar masssolMassphys.massfloatBcBolometric correctionphot.mag.bcfloatAv? Interstellar absorptionmagphys.absorptionfloatnullablerspec? Spectroscopic distancespcpos.distanceintnullablee_rspec? Uncertainty on rspecpcstat.errorintnullablerHIP? Distance given by Hipparcos parallaxpcpos.distanceintnullablee_rHIP? Uncertainty on rHIPpcstat.errorintnullableVMAGAbsolute visual magnitudemagphys.magAbs;em.opt.VfloatlogLlogarithm of luminositylog(solLum)phys.luminosityfloatlogAgelogarithm of agelog(yr)time.agefloatTeffEffective temperatureKphys.temperature.effectiveintlogglogarithm of surface gravitylog(cm.s**-2)phys.gravityfloat[FeI/H]Metallicity using FeI absorption linesphys.abund.Zfloate_[FeI/H]Uncertainty on [FeI/H]stat.error;phys.abundfloato_[FeI/H]Number of absorption lines of FeImeta.numberint[FeII/H]Metallicity using FeII absorption linesphys.abund.Zfloate_[FeII/H]Uncertainty on [FeII/H]stat.error;phys.abundfloato_[FeII/H]Number of absorption lines of FeIImeta.numberintvtMicroturbulent velocitykm/sphys.velocfloatSourceSource from which the star have been selected (G1)meta.bibchar[Na/Fe]? Na abundance derivedphys.abundfloatnullable[Mg/Fe]Mg abundance derivedphys.abundfloat[Al/Fe]? Al abundance derivedphys.abundfloatnullable[Si/Fe]Si abundance derivedphys.abundfloat[Ca/Fe]? Ca abundance derivedphys.abundfloatnullable[Ti/Fe]Ti abundance derivedphys.abundfloat[Cr/Fe]? Cr abundance derivedphys.abundfloatnullable[Ni/Fe]Ni abundance derivedphys.abundfloat[Y/Fe]Y abundance derivedphys.abundfloat[Zr/Fe]? Zr abundance derivedphys.abundfloatnullable[La/Fe]? La abundance derivedphys.abundfloatnullable[Ce/Fe]Ce abundance derivedphys.abundfloat[Nd/Fe]? Nd abundance derivedphys.abundfloatnullable[s/Fe]Abundance [s/Fe] (2)phys.abundfloat[hs/ls]Abundance [hs/ls]phys.abundfloatSimbadSimbad column added by the CDSphys.abundchar_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.mainJ/MNRAS/459/4299/table2Atomic lines used to derive the abundancesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIonAtomic lines used to derive the abundancesphys.atmol.ionStagecharlambdaWavelength of each atomic linenmem.wl;spect.linefloatEPExcitation potential of each atomic lineeVphys.atmol.excitation;spect.linefloatloggfloggf for each atomic linephys.absorption.coefffloatRefReference for the loggf values used (1)meta.ref;pos.framecharJ/MNRAS/459/4299/table4Atmospheric parameters from the literaturerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar namemeta.id;meta.maincharTeffEffective temperatureKphys.temperature.effectiveintlogglogarithm of surface gravitylog(cm.s**-2)phys.gravityfloat[FeI/H]? Metallicity using FeI absorption linesphys.abund.Zfloatnullablevt? Microturbulent velocitykm/sphys.velocfloatnullableRefSource from which the atmosphere parameters selected (1)meta.bibintJ/MNRAS/459/4299/table16Kinematical data for the true barium starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar namemeta.id;meta.maincharRVRadial velocitykm/sphys.veloc;pos.heliocentricfloate_RVUncertainty on ervkm/sstat.errorfloatUlsrSpatial velocity U relative to the local standard restkm/sphys.veloc;pos.cartesian.xfloate_UlsrUncertainty on Ulsrkm/sstat.errorfloatVlsrSpatial velocity V relative to the local standard restkm/sphys.veloc;pos.cartesian.y;pos.lsrfloate_VlsrUncertainty on Ulsrkm/sstat.error;phys.veloc;pos.lsrfloatWlsrSpatial velocity W relative to the local standard restkm/sphys.veloc;pos.cartesian.zfloate_WlsrUncertainty on Wlsrkm/sstat.errorfloatp1Probability of star being member of thin diskstat.fit.goodnessfloatp2Probability of star being member of thick diskstat.fit.goodnessfloatp3Probability of star being member of halostat.fit.goodnessfloatVspaSpatial velocitykm/sphys.velocfloat