J/MNRAS/474/2580ivo://CDS.VizieR/J/MNRAS/474/2580doi:10.26093/cds/vizier.74742580CDSSpina L.Melendez J.Karakas A.I.dos Santos L.Bedell M.Asplund M.,Ramirez I.Yong D.Alves-Brito A.Bean J.L.Dreizler S.2024-08-18T20:17:17Z2018-03-29T14:21:39ZCDS support team

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

cds-question@unistra.frg-starschemical-abundancesImportant insights into the formation and evolution of the Galactic disc(s) are contained in the chemical compositions of stars. We analysed high-resolution and high signal-to-noise HARPS spectra of 79 solar twin stars in order to obtain precise determinations of their atmospheric parameters, ages ({sigma}~0.4Gyr) and chemical abundances ({sigma}<0.01dex) of 12 neutron-capture elements (Sr, Y, Zr, Ba, La, Ce, Pr, Nd, Sm, Eu, Gd and Dy). This valuable data set allows us to study the [X/Fe]-age relations over a time interval of ~10Gyr and among stars belonging to the thin and thick discs. These relations show that (i) the s-process has been the main channel of nucleosynthesis of n-capture elements during the evolution of the thin disc; (ii) the thick disc is rich in r-process elements which suggests that its formation has been rapid and intensive. In addition, the heavy (Ba, La, Ce) and light (Sr, Y, Zr) s-process elements revealed details on the dependence between the yields of AGB stars and the stellar mass or metallicity. Finally, we confirmed that both [Y/Mg] and [Y/Al] ratios can be employed as stellar clocks, allowing ages of solar twin stars to be estimated with an average precision of ~0.5Gyr.2018MNRAS.474.2580Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/474/2580CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/508/L17 : Abundances in solar analogs (Ramirez+, 2009)J/ApJ/790/L23 : Solar analogs & twins rotation by Kepler (do Nascimento+ 2014)J/A+A/574/A124 : Spectroscopy of solar twins and analogues (Datson+, 2015)J/A+A/587/A131 : Solar twins in the ELODIE archive (Mahdi+, 2016)J/A+A/592/A156 : The Solar Twin Planet Search. IV. (dos Santos+, 2016)J/ApJ/839/94 : Abundances of solar twins from Keck/HIRES (Bedell+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/474/2580https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/474/2580http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/474/2580https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/474/2580https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/474/2580http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/474/2580GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/474/2580/table1 (The list of the 79 solar twins stars analysed in this paper)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/474/2580/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/474/2580/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/474/2580/table1?GETtext/xml+votable180.050000true32.7169958313.6832750.005555555555555556Cone search capability for table J/MNRAS/474/2580/table2 (Atmospheric parameters determined through our analysis)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/474/2580/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/474/2580/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/474/2580/table2?GETtext/xml+votable180.050000true32.7169958313.6832750.005555555555555556Cone search capability for table J/MNRAS/474/2580/table3 (Chemical abundances of the n-capture elements determined for the 79 solar twin stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/474/2580/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/474/2580/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/474/2580/table3?GETtext/xml+votable180.050000true32.7169958313.6832750.005555555555555556Cone search capability for table J/MNRAS/474/2580/table4 (Stellar ages and masses determined for the 79 solar twins)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/474/2580/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/474/2580/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/474/2580/table4?GETtext/xml+votable180.050000true32.7169958313.6832750.0055555555555555566/222 548 4128 4206 4313 4665 8244 8286 8614 8792 12890 17301 17341 17572 17587 17721 17929 18209 18373 19491 21114 21177 21516 23583 23661 23780 23873 25854 26160 26496 26888 27254 29422 29900 30878 30894 31029 31433 31945 33252 34983 35954 36453 36517 36590 36635 37515 37944 38279 38562 39557 39570 39576 39693 39801 39854 40105 40892 41935 42157 42228 42887 43105 43327 43845 43929 44131 45182 46056 46193 46487 46681 46734 46933 47137 47194 48310 48607 491143.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/474/2580?format=asciidefaultJ/MNRAS/474/2580/table1The list of the 79 solar twins stars analysed in this paperrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintAllDisplay data of the 4 tablesmeta.ref.urlcharHIPHIP identification numbermeta.id;meta.mainintHDHD namemeta.idcharRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainVmagV magnitude (Johnson)magphot.mag;em.opt.Vfloate_VmagError V magnitude (Johnson)magstat.error;phot.mag;em.opt.VfloatplxParallaxmaspos.parallax.trigfloate_plxError parallaxmasstat.error;pos.parallaxfloatr_plxReference parallaxmeta.ref;pos.framecharBinBinaritymeta.code.multipcharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/MNRAS/474/2580/table2Atmospheric parameters determined through our analysisSNRSignal-to-noise ratiopixel**-1stat.snrintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintAllDisplay data of the 4 tablesmeta.ref.urlcharHIPHIP identification numbermeta.id;meta.mainintRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainTeffEffective temperatureKphys.temperature.effectiveinte_TeffError of effective temperatureKstat.error;phys.temperature.effectiveintloggSurface gravitylog(cm.s**-2)phys.gravityfloate_loggError of Surface gravitylog(cm.s**-2)stat.errorfloat[Fe/H]Iron abundancephys.abund.Fefloate_[Fe/H]Error of iron abundancestat.error;phys.abund.FefloatXiMicroturbulencekm/sphys.veloc.microTurbfloate_XiError of microturbulencekm/sstat.errorfloatJ/MNRAS/474/2580/table3Chemical abundances of the n-capture elements determined for the 79 solar twin stars[DyII/H]DyII abundancephys.abundfloate_[DyII/H]Error on [DyII/H]stat.error;phys.abundfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintAllDisplay data of the 4 tablesmeta.ref.urlcharHIPHIP identification numbermeta.id;meta.mainintRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.main[SrI/H]SrI abundancephys.abundfloate_[SrI/H]Error on [SrI/H]stat.error;phys.abundfloat[YII/H]YII abundancephys.abundfloate_[YII/H]Error on [YII/H]stat.error;phys.abundfloat[ZrII/H]ZrII abundancephys.abundfloate_[ZrII/H]Error on [ZrII/H]stat.error;phys.abundfloat[BaII/H]BaII abundancephys.abundfloate_[BaII/H]Error on [BaII/H]stat.error;phys.abundfloat[LaII/H]LaII abundancephys.abundfloate_[LaII/H]Error on [LaII/H]stat.error;phys.abundfloat[CeII/H]CeII abundancephys.abundfloate_[CeII/H]Error on [CeII/H]stat.error;phys.abundfloat[PrII/H]PrII abundancephys.abundfloate_[PrII/H]Error on [PrII/H]stat.error;phys.abundfloat[NdII/H]NdII abundancephys.abundfloate_[NdII/H]Error on [NdII/H]stat.error;phys.abundfloat[SmII/H]SmII abundancephys.abundfloate_[SmII/H]Error on [SmII/H]stat.error;phys.abundfloat[EuII/H]EuII abundancephys.abundfloate_[EuII/H]Error on [EuII/H]stat.error;phys.abundfloat[GdII/H]GdII abundancephys.abundfloate_[GdII/H]Error on [GdII/H]stat.error;phys.abundfloatJ/MNRAS/474/2580/table4Stellar ages and masses determined for the 79 solar twinsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintAllDisplay data of the 4 tablesmeta.ref.urlcharHIPHIP identification numbermeta.id;meta.mainintRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainAgempPeak of age probability distributionGyrtime.age;stat.maxfloatAgeLL1sLower limit of the 68% confidence interval in the age probability distributionGyrtime.age;stat.minfloatAgeUL1sUpper limit of the 68% confidence interval in the age probability distributionGyrtime.age;stat.maxfloatAgeLL2sLower limit of the 95% confidence interval in the age probability distributionGyrtime.age;stat.minfloatAgeUL2sUpper limit of the 95% confidence interval in the age probability distributionGyrtime.age;stat.maxfloatAgemeanMean ageGyrtime.age;stat.meanfloatAgestdStandard deviationGyrtime.age;stat.stdevfloatMassmpPeak of mass probability distributionsolMassphys.mass;stat.maxfloatMassLL1sLower limit of the 68% confidence interval in the mass probability distributionsolMassphys.mass;stat.minfloatMassUL1sUpper limit of the 68% confidence interval in the mass probability distributionsolMassphys.mass;stat.maxfloatMassLL2sLower limit of the 95% confidence interval in the mass probability distributionsolMassphys.mass;stat.minfloatMassUL2sUpper limit of the 95% confidence interval in the mass probability distributionsolMassphys.mass;stat.maxfloatMassMeanMean masssolMassphys.mass;stat.meanfloatMassStdStandard deviationsolMassphys.mass;stat.stdevfloat