J/A+A/708/A250ivo://CDS.VizieR/J/A+A/708/A250CDSPakstiene E.Tautvaisiene G.Bagdonas V.Kjeldsen H.Winther M.L.,Drazdauskas A.Viscasillas Vazquez C.Chorniy Y.Mikolaitis S.,Minkeviciute R.Stonkute E.2026-05-04T07:43:19Z2026-04-13T08:44:40ZCDS support team

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

cds-question@unistra.frmilky-way-galaxychemical-abundancesstellar-agesastronomical-modelsStellar ages are typically very difficult to estimate for field stars. New empirical methods, based on abundance ratios of chemical elements, are emerging and need to be calibrated. Our main aim is to contribute to revealing relations between [C/N] and [Y/Mg] ratios and stellar ages by determining astroseismic ages, non-local thermodynamic equilibrium abundances, and accounting for stellar evolutionary stages and birth-places in the Galaxy. We searched for solar-type pulsations in a sample of 1250 bright F, G, and K giants using data from the TESS space telescope and determined asteroseismic ages using BASTA and PARAM codes. For the [Y/Mg] relations with age, we determined abundances accounting for deviations from the local thermodynamic equilibrium. For the [C/N] relations with age, we separated stars according to their evolutionary stages. We determined asteroseismic ages for 218 giants and derived [Y/Mg] and [C/N] relations with age for subsamples of stars in three regions of the Galactic thin disc and the thick disc. The [Y/Mg]-age relation exhibits a clear radial dependence across the Galactic disc, with a steeper trend in the outer disc, progressively flatter relations toward the inner disc, and very flat in the thick disc. NLTE abundances of Mg and especially of Y have to be used to have a more precise stellar age evaluation from [Y/Mg] ratios. When using [C/N] abundance ratios as stellar age indicators, evolutionary stages of stars have to be taken into account.2026A&A...708A.250Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/708/A250CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/259 : The Tycho-2 Catalogue (Hog+ 2000)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/708/A250https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/708/A250http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/708/A250https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/708/A250https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/708/A250http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/708/A250GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/708/A250/tablea1 (Parameters of studied stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/708/A250/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/708/A250/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/708/A250/tablea1?GETtext/xml+votable180.050000true273.517976443.28939580.0055555555555555566/9715 9723 9967 10005 10025 10031 10099 10101 10105-10106 10110 10135 10179 10187 10200 10220 10224 11359 11383 11457 11462 11473 11487 11494 11518 11534 11540 11542 11547 11571 11573 11575 11585 11595 11598 11610 11618 11627 11630 11633 11638 11647 11658 11665 11668 11671 11676 11679 11691 11706 11717 11719 11722 11726 11734 11737-11739 11744 11765 11845 11852 11865 11885 11889 11898 11900 11993 12037 12049 12051 12053 12079 12084 12099 12111 12143 12145 12147 12165 12171 12174 12181 12183 12186-12187 12190 12228 12230 12242 12248 12250 12255 12258 12274 15026 15074 15081 15096 15099 15103 15153 15180 15203 15207 15213 15217 15226-15227 15261 15266-15267 15269 15273 15280 15286-15287 15290 15302-15303 15320 15323 15327 15329 15332 15343 15349 15355 15357-15359 15527 15779 15783-15784 15787 15840 15850 15877 15882 15899 15901 15903 15907 15913 15916 15927-15928 15948 15950 15968-15969 15974 15988-15989 15995 15998 16003 16007 16009 16014 16018 16040 16043 16056 16065 16068-16069 16083 16085 16089 16094 16102 16111 16113 16115 16124 16127 16135 16139 16150 16160 16167 16183 16188 16198 16216 16219 16233 16243 16248 16251 16254 16264 16275 16294 16296 16302 16304 16323-16324 16326 16331 16346 16365https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/708/A250?format=asciidefaultJ/A+A/708/A250/tablea1Parameters of studied starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintAgePARAMAsteroseismic age determined using PARAM(v.1.5) (Age_PARAM)Gyrtime.agefloat_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainIDTycho-2 catalogue identification (ID)meta.id;meta.maincharSimbadSimbad column added by the CDSmeta.ref.urlchare_AgePARAMLower uncertainty (68% credible interval) in the age determination with PARAM (e_lo_Age_PARAM)Gyrstat.errorfloatE_AgePARAMUpper uncertainty (68% credible interval) in the age determination with PARAM (e_up_Age_PARAM)Gyrstat.error;stat.maxfloatAgeBASTA? Asteroseismic age determined using BASTA (Age_BASTA)Gyrtime.agefloatnullablee_AgeBASTA? Lower uncertainty (16th quantile) in the age determination with BASTA (e_lo_Age_BASTA)Gyrstat.errorfloatnullableE_AgeBASTA? Upper uncertainty (84th quantile) in the age determination with BASTA (e_up_Age_BASTA)Gyrstat.error;stat.maxfloatnullableAgeAsteroAsteroseismic age, averaged when both PARAM and BASTA age values available (Age_Asteroseismic)Gyrtime.agefloatnumaxFrequency at maximum power (Numax)uHzem.freq;src.varfloate_numaxUncertainty in frequency at maximum power (e_Numax)uHzstat.errorfloatDeltanuLarge frequency separation (DeltaNu)uHzem.freq;src.varfloate_DeltanuUncertainty in large frequency separation (e_DeltaNu)uHzstat.errorfloatMassPARAMStellar mass determined using PARAM(v.1.5) (Mass_PARAM)solMassphys.massfloate_MassPARAMLower uncertainty (68% credible interval) of mass determined with PARAM (e_lo_Mass_PARAM)solMassstat.errorfloatE_MassPARAMUpper uncertainty (68% credible interval) of mass determined with PARAM (e_up_Mass_PARAM)solMassstat.error;stat.maxfloatMassBASTA? Stellar mass determined with BASTA (Mass_BASTA)solMassphys.massfloatnullablee_MassBASTA? Lower uncertainty (16th quantile) of mass determined with BASTA (e_lo_Mass_BASTA)solMassstat.errorfloatnullableE_MassBASTA? Upper uncertainty (84th quantile) of mass determined with BASTA (e_up_Mass_BASTA)solMassstat.error;stat.maxfloatnullableMassAstero? Asteroseismic mass, averaged when both PARAM and BASTA mass values available (Mass_Asteroseismic)solMassphys.massfloatnullable[Mg/H]LTE? LTE magnesium abundance from Paper I or Paper III ([Mg/H]LTE)phys.abundfloatnullable[Mg/H]NLTE? NLTE magnesium abundance ([Mg/H]NLTE)phys.abundfloatnullable[Y/H]LTE1? LTE yttrium abundance from Paper II ([Y/H]LTE_1)phys.abundfloatnullable[Y/H]LTE2? LTE yttrium abundance determined in this work ([Y/H]LTE_2)phys.abundfloatnullablee_[Y/H]LTE2? Uncertainty in LTE yttrium abundance determined in this work (e_[Y/H]LTE_2)stat.error;phys.abundfloatnullable[Y/H]NLTE? NLTE yttrium abundance ([Y/H]NLTE)phys.abundfloatnullable[C/N]? Ratio of [C/N] from Paper I or Paper III ([C/N])phys.abundfloatnullableC/N? Carbon-to-nitrogen abundance ratio from Paper I or Paper III (C/N)phys.abundfloatnullableEvolEvolutionary stage (Evol) (1)meta.codecharEvolMethod[1/2]? Method of the evolutionary stage determination (Evol_method) (2)meta.codeintnullableDisc[0/1]? 0 = Thin disc, 1 = Thick disc; taken from Paper I or Paper III (Disc)meta.codeintnullable_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main