J/A+A/702/A144ivo://CDS.VizieR/J/A+A/702/A144doi:10.26093/cds/vizier/bc-ny/lbeeCDSLiagre B.Garcia R.A.Mathur S.Pinsonneault M.H.Serenelli A.,Zinn J.C.Cao K.Godoy-Rivera D.Tayar J.Beck P.G.Grossmann D.H.,Palakkatharappil D.B.2026-08-03T06:57:50Z2025-10-20T07:44:08ZCDS support team

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

cds-question@unistra.frasteroseismologygiant-starschemical-abundancesvisible-astronomygalaxy-classification-systemsSubgiants and early red giants are crucial for studying the first dredge-up, a key evolutionary phase in which the convective envelope deepens, mixing previously interior-processed material and bringing it to the surface. Yet, very few have been seismically characterized with Kepler because their oscillation frequencies are close to the 30 minute sampling frequency of the mission. We developed a new method as part of the new PyA2Z code of identifying super-Nyquist oscillators and inferring their global seismic parameters, {nu}max and large separation, {Delta}{nu}. Applying PyA2Z to 2065 Kepler targets, we seismically characterize 285 super-Nyquist and 168 close-to-Nyquist stars with masses from 0.8 to 1.6M_{sun}_. In combination with APOGEE spectroscopy, Gaia spectrophotometry, and stellar models, we derive stellar ages for the sample. There is good agreement between the predicted and actual positions of stars on the HR diagram (luminosity vs. effective temperature) as a function of mass and composition. While the timing of dredge-up is consistent with predictions, the magnitude and mass dependence show discrepancies with models, possibly due to uncertainties in model physics or calibration issues in observed abundance scales.2025A&A...702A.144Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/702/A144CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/133 : Kepler Input Catalog (Kepler Mission Team, 2009)IV/39 : TESS Input Catalog version 8.2 (TIC v8.2) (Paegert+, 2021)I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/702/A144https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/702/A144http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/702/A144https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/702/A144https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/702/A144http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/702/A144GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/702/A144/catalog (Asteroseismic and spectroscopic catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/702/A144/catalog?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/702/A144/catalog?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/702/A144/catalog?GETtext/xml+votable180.050000true291.861927537.56505330.0055555555555555564/922-923 933-935 944-946 5/3645-3647 3683 3704 3706 3729-3731 3765 3788-3789 3792 6/14567 14573 14575 14577-14579 14730-14731 14744 14746-14747 14749-14751 14792 14794-14795 14822 14828 14830 14914-14915 15040-15041 15043-15045 15057 15059 15160 15172-15174 15176 15178 15200 15232https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/702/A144?format=asciiOpticaldefaultJ/A+A/702/A144/catalogAsteroseismic and spectroscopic catalogrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintKIC? Kepler Input Catalog identifiermeta.id;meta.mainintnullablenumax? Frequency of maximum oscillation poweruHzem.freq;stat.maxdoublenullableDnu? Large frequency separationuHzem.freq;src.vardoublenullablee_numax? Uncertainty on NumaxuHzstat.errordoublenullablee_Dnu? Uncertainty on DnuuHzstat.errordoublenullableCatCategory (super-Nyquist, sub-Nyquist, etc.)meta.codecharSimbadNameSimbad column added by the CDSmeta.idcharnullable[alpha/Fe]? Abundance [alpha/Fe]phys.abunddoublenullablee_[alpha/Fe]? Uncertainty on [alpha/Fe]stat.error;phys.abunddoublenullableloggSpec? Spectroscopic surface gravitylog(cm.s**-2)phys.gravityfloatnullablee_loggSpec? Uncertainty on spectroscopic logglog(cm.s**-2)stat.errorfloatnullable[C/Fe]? Abundance [C/Fe]phys.abunddoublenullablee_[C/Fe]? Uncertainty on [C/Fe]stat.error;phys.abunddoublenullable[N/Fe]? Abundance [N/Fe]phys.abunddoublenullablee_[N/Fe]? Uncertainty on [N/Fe]stat.error;phys.abunddoublenullableInvRGaia? Inverse Gaia RadiussolRad**-1phys.size.radiusdoublenullablee_InvRGaia? Uncertainty on inverse Gaia RadiussolRad**-1stat.errordoublenullableloggseis? Seismic surface gravitylog(cm.s**-2)phys.gravitydoublenullablee_loggseis? Uncertainty on seismic logglog(cm.s**-2)stat.errordoublenullableMass? Stellar masssolMassphys.massdoublenullablee_Mass? Uncertainty on stellar masssolMassstat.error;phys.massdoublenullableRadius? Stellar radiussolRadphys.angSize;srcdoublenullablee_Radius? Uncertainty on stellar radiussolRadstat.error;phys.size.radiusdoublenullableFdnu? Frequency separation correction factorarith.factor;phot.fluxdoublenullablee_Fdnu? Uncertainty on Fdnustat.errordoublenullableAge? Stellar ageGyrtime.agefloatnullableE_Age? Upper uncertainty on RGB ageGyrstat.error;stat.maxfloatnullablee_Age? Lower uncertainty on RGB ageGyrstat.error;time.agefloatnullableTeff? Effective temperatureKphys.temperature.effectivedoublenullablee_Teff? Uncertainty on effective temperatureKstat.error;phys.temperature.effectivefloatnullableSourceSource catalog (APOKASC3, XGBoost, etc.)meta.codechar[Fe/H]? Metallicity [Fe/H]phys.abund.Zfloatnullablee_[Fe/H]? Uncertainty on [Fe/H]stat.error;phys.abund.FefloatnullableL? LuminositysolLumphys.luminositydoublenullablee_L? Uncertainty on luminositysolLumstat.errordoublenullableGaiaDR3? Gaia DR3 source identifiermeta.idnullableTIC? TESS Input Catalog identifiermeta.idlongnullable2MASS2MASS identifiermeta.idcharNquarters? Number of Kepler observing quartersmeta.numberintnullable_RAPositions from TIC or KIC (right ascension part)degpos.eq.ra;meta.main_DEPositions from TIC or KIC (declination part)degpos.eq.dec;meta.main