J/AJ/161/100ivo://CDS.VizieR/J/AJ/161/100doi:10.26093/cds/vizier.51610100CDSWarfield J.T.Zinn J.C.Pinsonneault M.H.Johnson J.A.Stello D.,Elsworth Y.Garcia R.A.Kallinger T.Mathur S.Mosser B.Beaton R.L.,Garcia-Hernandez D.A.2023-05-12T11:22:21Z2021-04-28T07:51:37ZCDS support team

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

cds-question@unistra.frsurveysmilky-way-galaxystellar-agesstellar-massesgiant-starschemical-abundanceseffective-temperatureinfrared-astronomyspectroscopyWe explore the relationships between the chemistry, ages, and locations of stars in the Galaxy using asteroseismic data from the K2 mission and spectroscopic data from the Apache Point Galactic Evolution Experiment survey. Previous studies have used giant stars in the Kepler field to map the relationship between the chemical composition and the ages of stars at the solar circle. Consistent with prior work, we find that stars with high [{alpha}/Fe] have distinct, older ages in comparison to stars with low [{alpha}/Fe]. We provide age estimates for red giant branch (RGB) stars in the Kepler field, which support and build upon previous age estimates by taking into account the effect of {alpha}-enrichment on opacity. Including this effect for [{alpha}/Fe]-rich stars results in up to 10% older ages for low- mass stars relative to corrected solar mixture calculations. This is a significant effect that Galactic archeology studies should take into account. Looking beyond the Kepler field, we estimate ages for 735 RGB stars from the K2 mission, mapping age trends as a function of the line of sight. We find that the age distributions for low- and high-[{alpha}/Fe] stars converge with increasing distance from the Galactic plane, in agreement with suggestions from earlier work. We find that K2 stars with high [{alpha}/Fe] appear to be younger than their counterparts in the Kepler field, overlapping more significantly with a similarly aged low-[{alpha}/Fe] population. This observation may suggest that star formation or radial migration proceeds unevenly in the Galaxy.2021AJ....161..100Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/161/100CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/133 : Kepler Input Catalog (Kepler Mission Team, 2009)I/337 : Gaia DR1 (Gaia Collaboration, 2016)I/345 : Gaia DR2 (Gaia Collaboration, 2018)III/284 : APOGEE-2 data from DR16 (Johnsson+, 2020)J/A+A/410/527 : Abundances in the Galactic disk (Bensby+, 2003)J/ApJ/746/16 : Modelling the convection zone (van Saders+, 2012)J/ApJS/215/19 : APOKASC catalog of Kepler red giants (Pinsonneault+, 2014)J/MNRAS/445/2758 : KIC giants Bayesian dist. & extinctions (Rodrigues+, 2014)J/MNRAS/452/2127 : Fundamental parameters of Kepler stars (Silva Aguirre+,2015)J/AJ/151/144 : ASPCAP weights for 15 APOGEE chemic. elements (Garcia+,2016)J/A+A/597/A30 : Seismology & spectroscopy of CoRoGEE red giants (Anders+,2017)J/ApJ/844/102 : KIC star plxs from asteroseismology vs Gaia (Huber+, 2017)J/ApJ/835/173 : Kepler asteroseismic LEGACY sample. II. (Silva Aguirre+, 2017)J/ApJ/835/83 : K2 GAP data release. I. Campaign 1 (Stello+, 2017)J/ApJS/239/32 : APOKASC-2 catalog of Kepler evolved stars (Pinsonneault+,2018)J/AJ/156/18 : APOGEE DR14:Binary comp. of evolved stars (Price-Whelan+,2018)J/A+A/627/A173 : Abundances for 4 metal-poor stars (Valentini+, 2019)J/ApJS/251/23 : K2 GAP DR2: campaigns 4, 6 & 7 (Zinn+, 2020)J/A+A/645/A85 : Age dissection of the Milky Way discs (Miglio+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/161/100https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/161/100http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/161/100https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/161/100https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/161/100http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/161/100GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/161/100/table3 (Data for K2 campaigns 4, 6, and 7, including our ages)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/161/100/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/161/100/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/161/100/table3?GETtext/xml+votable180.050000true59.91304215.3295239999999970.005555555555555556Cone search capability for table J/AJ/161/100/table4 (RGB stars in the Kepler field, including our ages)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/161/100/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/161/100/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/161/100/table4?GETtext/xml+votable180.050000true291.334209736.78661470.0055555555555555564/922-923 933-935 944-946 5/94 113 116 266 3646-3647 3683 3704 3706 3729 3731 3760 3788-3789 3792 6404 6406 6409 6411-6412 6422-6423 11182 11192 12007 6/279 285 322 328 330 336-337 339-342 366 375 381 383 410-411 461 468 470-473 476-478 1058-1059 14567 14573 14575 14577-14579 14581-14583 14730-14731 14744 14746 14750-14751 14792 14794-14795 14822 14828 14830-14831 14914-14915 14920-14921 14923 15044-15045 15057 15059-15061 15160 15172-15174 15178 15200 15232 23483 23523 23526 23529 23531-23532 23546-23547 23550 25605 25607 25622 25628 25630 25641-25643 25652 25654 25656-25657 25659-25660 25662-25663 25667 25670 25672-25673 25675-25678 25681 25683-25684 25686-25687 25701 25706 25709 25712-25714 25722 25726 25729 25732 25734 25748-25749 25812 25814 28941 28943 28952 28954 28965 28981 28996 29005 29024 29026 44717 44719 44722-44723 44732-44734 44774 44776-44777 44779-44780 44782 48022-48023 48046 48059 48072https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/161/100?format=asciiInfrareddefaultJ/AJ/161/100/table3Data for K2 campaigns 4, 6, and 7, including our agesSimbadNameSimbad column added by the CDSmeta.idcharnullablee_dnu.CAN[0.009/0.36]? Uncertainty on dnu.CANuHzstat.errorfloatnullablee_dnu.SYD[0.02/0.84]? Uncertainty on dnu.SYDuHzstat.errorfloatnullablelogg.SEIS[1.71/3.23] Asteroseismic log surface gravitylog(cm.s**-2)phys.gravityfloatDEJ2000[-29.6/26.2] Declination (J2000)degpos.eq.dec;meta.mainGAIAObject GAIA designationmeta.id.crosscharK2K2 object IDmeta.id.crossdoublednu.BHM[1.48/14.9]? Corrected dnu from the BHM pipeline from K2GAPuHzem.freq;src.varfloatnullablee_dnu.BHM[0.05/0.95]? Uncertainty on dnu.BHMuHzstat.errorfloatnullablednu.SYD[1.47/14.4]? Corrected dnu from the SYD pipeline from K2GAPuHzem.freq;src.varfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintK2camp[4/7] K2 campaign fieldobs.fieldintAPOGEEAPOGEE object IDmeta.id;meta.maincharAge[0.14/652] Median calculated stellar ageGyrtime.age;stat.medianfloate_Age[0/457] Lower 1-sigma deviation on stellar ageGyrstat.error;time.agefloatE_Age[0/4998] Upper 1-sigma deviation on stellar ageGyrstat.error;time.agefloatRAJ2000[51.6/291] Right Ascension (J2000)degpos.eq.ra;meta.mainTeff[3732/5304] Corrected effective temperature from APOGEE DR16Kphys.temperature.effectivedoublee_Teff[60/158] Uncertainty on TeffKstat.error;phys.temperature.effectivedoublelogg[0.67/3.19] Corrected log surface gravity from APOGEE DR16log(cm.s**-2)phys.gravitydoublee_logg[0.03/0.12] Uncertainty on corrected logglog(cm.s**-2)stat.errordouble[alpha/M][0.0002/0.39] Alpha abundance from APOGEE DR16log(Sun)phys.abunddoublee_[alpha/M][0.004/0.04] Uncertainty on [alpha/M]log(Sun)stat.errordouble[Fe/H][-1.9/0.43] Metallicity from APOGEE DR16log(Sun)phys.abund.Fedoublee_[Fe/H][0.005/0.04] Uncertainty on [Fe/H]log(Sun)stat.error;phys.abund.Fedoublenumax[6.57/207] Mean value of numax from all pipelines that returned a value from K2GAPuHzem.freq;src.varfloate_numax[0.024/2.66] Uncertainty on numaxuHzstat.errorfloatdnu[1.07/16.6]? Mean value of dnu from all pipelines that returned a value from K2GAPuHzem.freq;src.varfloatnullablee_dnu[0/0.32]? Uncertainty on dnuuHzstat.errorfloatnullablenumax.COR[6.47/207]? Corrected numax from the COR pipeline from K2GAPuHzem.freq;src.varfloatnullablee_numax.COR[0.23/3.39]? Uncertainty on numax.CORuHzstat.errorfloatnullablenumax.A2Z[6.16/183]? Corrected numax from the A2Z pipeline from K2GAPuHzem.freq;src.varfloatnullablee_numax.A2Z[0.34/23]? Uncertainty on numax.A2ZuHzstat.errorfloatnullablenumax.BAM[7.07/185]? Corrected numax from the BAM pipeline from K2GAPuHzem.freq;src.varfloatnullablee_numax.BAM[0.18/3.8]? Uncertainty on numax.BAMuHzstat.errorfloatnullablenumax.CAN[7.78/176]? Corrected numax from the CAN pipeline from K2GAPuHzem.freq;src.varfloatnullablee_numax.CAN[0.25/3.4]? Uncertainty on numax.CANuHzstat.errorfloatnullablenumax.BHM[9.94/181]? Corrected numax from the BHM pipeline from K2GAPuHzem.freq;src.varfloatnullablee_numax.BHM[0.19/3.3]? Uncertainty on numax.BHMuHzstat.errorfloatnullablenumax.SYD[7.44/207]? Corrected numax from the SYD pipeline from K2GAPuHzem.freq;src.varfloatnullablee_numax.SYD[0.12/36]? Uncertainty on numax.SYDuHzstat.errorfloatnullablednu.COR[1.05/16.4]? Corrected dnu from the COR pipeline from K2GAPuHzem.freq;src.varfloatnullablee_dnu.COR[0.05/0.23]? Uncertainty on dnu.CORuHzstat.errorfloatnullablednu.A2Z[1.23/15.5]? Corrected dnu from the A2Z pipeline from K2GAPuHzem.freq;src.varfloatnullablee_dnu.A2Z[0.01/0.87]? Uncertainty on dnu.A2ZuHzstat.errorfloatnullablednu.BAM[1.24/14.4]? Corrected dnu from the BAM pipeline from K2GAPuHzem.freq;src.varfloatnullablee_dnu.BAM[0.005/1.4]? Uncertainty on dnu.BAMuHzstat.errorfloatnullablednu.CAN[1.09/14]? Corrected dnu from the CAN pipeline from K2GAPuHzem.freq;src.varfloatnullablee_logg.SEIS[0.004/0.04] Uncertainty on logg.SEISlog(cm.s**-2)stat.errorfloatMass[0.3/3.67] Asteroseismic masssolMassphys.massfloate_Mass[0.03/1.1]? Uncertainty on MasssolMassstat.error;phys.massfloatnullableDist[0.33/11.4] Distance calculated from GAIA parallax from Bailer-Jones 2015kpcpos.distance;src.orbitalfloate_Dist[0.01/7.4] Uncertainty on Distkpcstat.error;pos.distancefloatX[-12.3/-1.04] Galactocentric X coordinate calculated with astropykpcpos.cartesian.x;pos.galactocentric;meta.modelledfloatY[-4.26/1.4] Galactocentric Y coordinate calculated with astropykpcpos.cartesian.y;pos.galactocentric;meta.modelledfloatZ[-2.37/8.66] Galactocentric Z coordinate calculated with astropykpcpos.cartesian.z;pos.galactocentric;meta.modelledfloatR[1.59/12.31] Galactocentric R coordinate calculated with astropykpcpos.frame;pos.galactocentric;meta.modelledfloatJ/AJ/161/100/table4RGB stars in the Kepler field, including our agesSimbadNameSimbad column added by the CDSmeta.idcharnullableR[7.73/11.09] Galactocentric R coordinate calculated with astropykpcpos.frame;pos.galactocentric;meta.modelledfloat_RAPosition from SIMBAD (right ascension part)degpos.eq.ra;meta.main_DEPosition from SIMBAD (declination part)degpos.eq.dec;meta.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintKICMAST Kepler Input Catalog IDmeta.id.crossintAPOGEEAPOGEE object IDmeta.id;meta.maincharAge[0.28/150] Median calculated stellar ageGyrtime.age;stat.medianfloate_Age[0.02/88] Lower 1-sigma deviation on AgeGyrstat.error;time.agefloatE_Age[0.03/400] Upper 1-sigma deviation on AgeGyrstat.error;time.agefloatAge.APO[0.4/17.7] Calculated stellar age from Pinsonneault et al. 2018Gyrtime.age;meta.modelledfloatTeff[3942/5239] Corrected effective temperature from APOGEE DR16Kphys.temperature.effectivedoublee_Teff[65/130] Uncertainty on TeffKstat.error;phys.temperature.effectivedoublelogg[1.41/3.35] Corrected log surface gravity from APOGEE DR16log(cm.s**-2)phys.gravitydoublee_logg[0.02/0.12] Uncertainty on logglog(cm.s**-2)stat.errordouble[alpha/M][6e-06/0.39] Alpha abundance from APOGEE DR16log(Sun)phys.abunddoublee_[alpha/M][0.004/0.03] Uncertainty on [alpha/M]log(Sun)stat.errordouble[Fe/H][-2.15/0.45] Metallicity from APOGEE DR16log(Sun)phys.abund.Fedoublee_[Fe/H][0.005/0.03] Uncertainty on [Fe/H]log(Sun)stat.error;phys.abund.Fedoublenumax[4.78/249] Mean value of numax from all pipelines from APOKASC2uHzem.freq;src.varfloate_numax[0.05/7.01] Uncertainty on numaxuHzstat.errorfloatdnu[0.74/19.2] Mean value of dnu from all pipelines from APOKASC2, with our f_dnu_ correctionuHzem.freq;src.varfloate_dnu[0.004/0.5] Uncertainty on dnuuHzstat.errorfloatMass[0.53/3.4] Asteroseismic masssolMassphys.massfloate_Mass[0.03/1.1] Uncertainty on MasssolMassstat.error;phys.massfloatX[-8.26/-5.69] Galactocentric X coordinate calculated with astropykpcpos.cartesian.x;pos.galactocentric;meta.modelledfloatY[0.19/9.18] Galactocentric Y coordinate calculated with astropykpcpos.cartesian.y;pos.galactocentric;meta.modelledfloatZ[0.06/2.58] Galactocentric Z coordinate calculated with astropykpcpos.cartesian.z;pos.galactocentric;meta.modelledfloat