J/MNRAS/482/1690ivo://CDS.VizieR/J/MNRAS/482/1690doi:10.26093/cds/vizier.74821690CDSBotelho R.B.Milone A. de C.Melendez J.Bedell M.Spina L.,Asplund M.dos Santos L.Bean J.L.Ramirez I.Yong D.Dreizler S.,Alves-Brito A.Yana Galarza J.2024-08-19T20:14:44Z2022-08-02T08:23:17ZCDS support team

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

cds-question@unistra.frchemical-abundancesmultiple-starsexoplanetsvisible-astronomyWe have investigated the thorium (Th) abundance in a sample of 53 thin disc solar twins covering a wide range of ages. These data provide constrains on the mantle energy budget of terrestrial planets that can be formed over the evolution of the Galaxy's thin disc. We have estimated Th abundances with an average precision of 0.025dex (in both [Th/H] and [Th/Fe]) through comprehensive spectral synthesis of a ThII line present at 4019.1290{AA}, using very high resolution (R=115000) high quality HARPS spectra obtained at the ESO La Silla Observatory. We have confirmed that there is a large energy budget from Th decay for maintaining mantle convection inside potential rocky planets around solar twins, from the Galactic thin disc formation until now, because the pristine [Th/H]_ZAMS_ is super-solar on average under a uniform dispersion of 0.056dex (varying from +0.037 up to +0.138dex based on linear fits against isochrone stellar age). Comparing to neodymium (Nd) and europium (Eu), two others neutron-capture elements, the stellar pristine abundance of Th follows Eu along the Galactic thin disc evolution, but it does not follow Nd, probably because neodymium has a significant contribution from the s-process (about 60 per cent).2019MNRAS.482.1690Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/482/1690CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/482/1690https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/482/1690http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/482/1690https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/482/1690https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/482/1690http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/482/1690GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/482/1690/table3 (Thorium abundance measured in this work relatively to the Sun for 67 solar twins)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/482/1690/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/482/1690/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/482/1690/table3?GETtext/xml+votable180.050000true6/222 548 4128 4206 4313 4665 8244 8286 8614 8792 12890 17301 17572 17721 17929 18209 18373 19491 21114 21177 21516 23583 23780 23873 25854 26160 26496 26888 27254 29422 29900 30878 30894 31029 31433 31945 33252 36453 36517 36590 36635 37515 37944 38279 39557 39570 39576 39801 40105 40892 41935 42157 42228 42887 43105 43327 43845 43929 46056 46193 46734 46933 47137 47194 48310 48607 49114https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/482/1690?format=asciiOpticaldefaultJ/MNRAS/482/1690/table1Stellar parameters of the stars collected from previous published works (covering 58 solar twins)[Si/H]Silicon to Hydrogen abundance ratio (3)phys.abundfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar ID (HIP NNNNNN)meta.id;meta.maincharTeffEffective temperature (1)Kphys.temperature.effectiveinte_TeffError on Teff (1)Kstat.error;phys.temperature.effectiveintloggSurface gravity (1)log(cm.s**-2)phys.gravityfloate_loggError on logg (1)log(cm.s**-2)stat.errorfloat[Fe/H]Iron to Hydrogen abundance ratio (1)phys.abund.Fe;arith.ratiofloate_[Fe/H]Error on [Fe/H] (1)stat.error;phys.abund.FefloatVmicroMicro-turbulence velocity (1)km/sphys.veloc.microTurbfloate_VmicroError on Vmicro (1)km/sstat.errorfloatVmacroMacro-turbulence velocity (2)km/sphys.velocfloatVsiniLine-of-sight rotational velocity (2)km/sphys.veloc.rotatfloatAgeIsochrone stellar age (1)Gyrtime.agefloate_AgeError on Age (1)Gyrstat.error;time.agefloate_[Si/H]Error on [Si/H] (3)stat.error;phys.abundfloat[Nd/H]Neodymium to Hydrogen abundance ratio (3)phys.abundfloate_[Nd/H]Error on [Nd/H] (3)stat.error;phys.abundfloat[Eu/H]Europium to Hydrogen abundance ratio (3)phys.abundfloate_[Eu/H]Error on [Eu/H] (3)stat.error;phys.abundfloatJ/MNRAS/482/1690/table2Line list after the gf calibration to the solar spectrumrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelenght (1)0.1nmem.wl;phys.atmol.transitiondoublespcodeSpecies code (2)meta.codedoubleXeExcitation potential of transition inferior leveleVphys.atmol.excitation;phys.atmol.level;phys.atmol.transitionfloatgfLog of the oscillator strength (3)phys.atmol.oscStrengthdoublespidSpecies identificationmeta.id;meta.maincharJ/MNRAS/482/1690/table3Thorium abundance measured in this work relatively to the Sun for 67 solar twinsSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar ID (HIP NNNNNN)meta.id;meta.maincharprimaryPrevindicates previous measurementsmeta.ref.urlchar[Th/H]Thorium to Hydrogen abundancephys.abundfloate_[Th/H]Error on [Th/H]stat.error;phys.abundfloat[Th/Fe]Thorium to Iron abundancephys.abundfloate_[Th/Fe]Error on [Th/Fe]stat.error;phys.abundfloatSNRSignal to noise ratiostat.snrintChi2minMinimized chi-squared (1)stat.fit.chi2double_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.mainnullable_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainnullable