J/A+A/690/A107ivo://CDS.VizieR/J/A+A/690/A107doi:10.26093/cds/vizier.36900107CDSShejeelammal J.Melendez J.Rathsam A.Martos G.2025-03-03T20:00:55Z2024-10-01T12:30:17ZCDS support team

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

cds-question@unistra.frmilky-way-galaxystellar-ageschemical-abundancesStellar ages are an important parameter in studies of the chemical evolution of the Galaxy. To better estimate these ages, various methods complementary to the conventional isochrone fitting method have been implemented in the past decade. Several recent studies have established the existence of a relationship between chemical clocks and stellar ages. The [Y/Mg] clock is a promising technique, but there are still several open questions, such as its validity for metal-poor stars and differences between the thin and thick disk populations. Our aim is to study the relationship between the [Y/Mg] chemical clock and stellar ages for a sample of solar-type disk stars and to provide the empirical dating relation(s) for the stellar age determination from their precise chemical abundances. We also studied the effect of metallicity and populations on this chemical clock. We derived precise stellar atmospheric parameters as well as the elemental abundances of Mg and Y through line-by-line differential spectroscopic analysis for a sample of 48 metal-poor solar-type stars based on high-quality, high-resolution ESO/HARPS spectra. From high-precision Gaia astrometric data, stellar masses and ages were estimated through isochrone fitting using Yonsei-Yale isochrones. A joint analysis of our sample, together with a sample of 185 solar twins and analogues from our previous works, was performed to calibrate the [Y/Mg] chemical clock in the Galactic disk for -0.71<=[Fe/H]<+0.34. Open clusters and stars with asteroseismic ages were used to validate our relations. Two different populations are clearly seen in the [Mg/Fe]-[Fe/H] plane: the thick and thin disks. Thick disk stars show an age-metallicity relation, whereas the thin disk shows a flatter age-metallicity distribution. We find a strong, metallicity-dependent anti-correlation between the [Y/Mg] ratio and the stellar ages of our sample. For the first time in the literature, we report similar correlations for thin and thick disk stars. We find that the [Y/Mg] relation(s) found here for solar-type stars in a wide metallicity range are compatible with those found for solar twins in the literature. Our relation provides high accuracy and precision (0.45 and 0.99 Gyr, respectively) comparable with the best accuracy achieved for solar twins to date.2024A&A...690A.107Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/690/A107CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/690/A107https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/690/A107http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/690/A107https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/690/A107https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/690/A107http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/690/A107GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/690/A107/tablea1 (Stellar atmospheric parameters, mass, age, and elemental abundance ratios of the sample analysed in this study)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/690/A107/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/690/A107/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/690/A107/tablea1?GETtext/xml+votable180.050000true1.7245014-3.62626310.005555555555555556Cone search capability for table J/A+A/690/A107/tablea2 (Stellar atmospheric parameters, mass, age, and elemental abundance ratios of the solar twins and analogues (corrected version, 04/02/2025))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/690/A107/tablea2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/690/A107/tablea2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/690/A107/tablea2?GETtext/xml+votable180.050000true2.0681733-14.82449110.0055555555555555566/222 548 4128 4206 4313 4665 8244 8286 8614 8792 12341 12890 16458 16986 17047 17177 17266 17301 17341 17374 17419 17540-17541 17552 17572 17587 17607 17721 17744 17768 17929 17970 18005 18209 18373 18614-18615 19072 19217 19491 20492 20495 20701 20739 20746 21114 21121 21177 21477 21516 21550 22590 22608 22760 22837 23342 23583 23661 23774 23780 23873 24876 24924 25102 25225 25567 25584 25820 25854 25906 25939 26160 26496 26652 26768 26812 26888 26901 26924 26997 27254 27741 28719 28874 28961 29289 29349 29422 29513 29833 29900 30878 30894 30943 30951 30965 31029 31130 31433 31945 32787 32912 32986 33063 33082 33252 33456 33608 34442 34481 34530 34983 35152 35533 35733 35954 36019 36453 36517 36590 36635 36664 36713 37408 37515 37573 37595 37944 38099 38238 38279 38283 38339 38386 38434 38562 38742 38975 38998 39030 39034 39074 39213 39364 39377 39500 39557 39570 39576 39584 39693 39735 39767 39801 39854 39888 40105 40514 40687 40692 40722 40802 40892 40921 40932 40938 40970 41204 41443 41912 41935 41941 42157 42228 42326 42656 42700 42887 42918 43001 43105 43315 43327 43544 43649 43813 43845 43911 43929 43977 44115 44131 44150 44359 45182 45265 45485 45640-45641 46056 46080 46172 46193 46247 46306 46487 46681 46734 46768 46820 46874 46933 47022 47045 47137 47194 47407 47590 47647 47858 47903 47930 48172 48310 48402 48490 48519 48607 48807 48943 49042 49114 49128https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/690/A107?format=asciidefaultJ/A+A/690/A107/tablea1Stellar atmospheric parameters, mass, age, and elemental abundance ratios of the sample analysed in this studyTeffEffective temperatureKphys.temperature.effectiveinte_TeffError in temperatureKstat.error;phys.temperature.effectiveintloggSurface gravitylog(cm.s**-2)phys.gravityfloate_loggError in logglog(cm.s**-2)stat.errorfloat[Fe/H]metallicityphys.abund.Zfloate_[Fe/H]Error in metallicitystat.error;phys.abund.FefloatVtMicroturbulent velocitykm/sphys.velocfloate_VtError in microturbulent velocitykm/sstat.errorfloatAgeStellar ageGyrtime.agefloate_AgeLower error in ageGyrstat.error;time.agefloatE_AgeUpper error in ageGyrstat.error;stat.maxfloatMassStellar mass in solar unitsolMassphys.massfloate_MassLower error in masssolMassstat.error;phys.massfloatE_MassUpper error in masssolMassstat.error;stat.maxfloat[Mg/Fe]Mg abundance relative to Fephys.abundfloate_[Mg/Fe]Error in [Mg/Fe]stat.error;phys.abundfloat[Y/Fe]Y abundance relative to Fephys.abund.Yfloate_[Y/Fe]Error in [Y/Fe]stat.error;phys.abundfloat[Y/Mg]Y abundance relative to Mgphys.abundfloate_[Y/Mg]Error in [Y/Mg]stat.errorfloat_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.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar Namemeta.id;meta.maincharHIPStar HIP identifiermeta.idintSimbadSimbad column added by the CDSmeta.ref.urlcharJ/A+A/690/A107/tablea2Stellar atmospheric parameters, mass, age, and elemental abundance ratios of the solar twins and analogues (corrected version, 04/02/2025)NameStar Namemeta.id;meta.maincharHIPStar HIP identifiermeta.idintTeffEffective temperatureKphys.temperature.effectiveinte_TeffError in temperatureKstat.error;phys.temperature.effectiveintloggSurface gravitylog(cm.s**-2)phys.gravityfloate_loggError in logglog(cm.s**-2)stat.errorfloat[Fe/H]metallicityphys.abund.Zfloate_[Fe/H]Error in metallicitystat.error;phys.abund.FefloatVtMicroturbulent velocitykm/sphys.velocfloate_VtError in microturbulent velocitykm/sstat.errorfloatAgeStellar ageGyrtime.agefloate_AgeLower error in ageGyrstat.error;time.agefloatE_AgeUpper error in ageGyrstat.error;stat.maxfloatMassStellar mass in solar unitsolMassphys.massfloate_MassLower error in masssolMassstat.error;phys.massfloatE_MassUpper error in masssolMassstat.error;stat.maxfloatSimbadSimbad column added by the CDSmeta.ref.urlchar[Mg/Fe]Mg abundance relative to Fephys.abundfloate_[Mg/Fe]Error in [Mg/Fe]stat.error;phys.abundfloat[Y/Fe]Y abundance relative to Fephys.abund.Yfloate_[Y/Fe]Error in [Y/Fe]stat.error;phys.abundfloat[Y/Mg]Y abundance relative to Mgphys.abundfloate_[Y/Mg]Error in [Y/Mg]stat.errorfloat_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.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint