J/AJ/167/208ivo://CDS.VizieR/J/AJ/167/208doi:10.26093/cds/vizier.51670208CDSWarfield J.T.Zinn J.C.Schonhut-Stasik J.Johnson J.W.,Pinsonneault M.H.Johnson J.A.Stello D.Beaton R.L.Elsworth Y.,Garcia R.A.Mathur S.Mosser B.Serenelli A.Tayar J.2026-02-11T20:01:49Z2024-06-24T08:31:26ZCDS support team

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

cds-question@unistra.frmilky-way-galaxygiant-starsstellar-agesmetallicitystellar-massesstellar-radiiinfrared-astronomyWe present stellar age determinations for 4661 red giant branch stars in the APO-K2 catalog, derived using mass estimates from K2 asteroseismology from the K2 Galactic Archaeology Program and elemental abundances from the Apache Point Galactic Evolution Experiment survey. Our sample includes 17 of the 19 fields observed by K2, making it one of the most comprehensive catalogs of accurate stellar ages across the Galaxy in terms of the wide range of populations spanned by its stars, enabling rigorous tests of Galactic chemical evolution models. Taking into account the selection functions of the K2 sample, the data appear to support the age-chemistry morphology of stellar populations predicted by both inside-out and late-burst scenarios. We also investigate trends in age versus stellar chemistry and Galactic position, which are consistent with previous findings. Comparisons against APOKASC-3 asteroseismic ages show agreement to within ~3%. We also discuss offsets between our ages and spectroscopic ages. Finally, we note that ignoring the effects of {alpha}-enhancement on stellar opacity (either directly or with the Salaris metallicity correction) results in an ~10% offset in age estimates for the most {alpha}-enhanced stars, which is an important consideration for continued tests of Galactic models with this and other asteroseismic age samples.2024AJ....167..208Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/167/208CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/337 : Gaia DR1 (Gaia Collaboration, 2016)IV/34 : K2 Ecliptic Plane Input Catalog (EPIC) (Huber+, 2017)I/345 : Gaia DR2 (Gaia Collaboration, 2018)III/284 : APOGEE-2 data from DR16 (Johnsson+, 2020)III/286 : APOGEE-2 DR17 final allStar catalog (Abdurro'uf+, 2022)VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)J/AJ/112/359 : Galaxies in the Hubble Deep Field (van den Bergh+ 1996)J/A+A/410/527 : Abundances in the Galactic disk (Bensby+, 2003)J/other/A+ARV/18.67 : Accurate masses and radii of normal stars (Torres+, 2010)J/ApJ/746/16 : Modelling the convection zone (van Saders+, 2012)J/MNRAS/456/3655 : Masses and ages of red giants (Martig+, 2016)J/A+A/597/A30 : Seismology & spectroscopy CoRoGEE red giants (Anders+, 2017)J/ApJ/835/83 : K2 GAP data release. I. Campaign 1 (Stello+, 2017)J/MNRAS/476/3233 : 14983 Kepler red giants (Hon+, 2018)J/ApJS/239/32 : APOKASC-2 cat of Kepler evolved stars (Pinsonneault+, 2018)J/MNRAS/475/5487 : Stellar properties of KIC stars (Silva Aguirre+, 2018)J/MNRAS/489/4641 : APOKASC Evolutionary state red-giant stars (Elsworth+, 2019)J/MNRAS/489/176 : Dynamical heating across Milky Way disc (Mackereth+, 2019)J/ApJ/878/21 : Vertical motions APOGEE & Gaia red clump stars (Ting+, 2019)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)J/AJ/161/100 : Ages & alpha-abundances population in K2 (Warfield+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/167/208https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/167/208http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/167/208https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/167/208https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/167/208http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/167/208GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/167/208/table1 (APO-K2 RGB sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/167/208/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/167/208/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/167/208/table1?GETtext/xml+votable180.050000true126.754317.62370.005555555555555556Cone search capability for table J/AJ/167/208/table2 (Re-calibrated APOKASC-2 RGB sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/167/208/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/167/208/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/167/208/table2?GETtext/xml+votable180.050000true296.339447.41980.005555555555555556Cone search capability for table J/AJ/167/208/table3 (APO-K2 RC sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/167/208/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/167/208/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/167/208/table3?GETtext/xml+votable180.050000true125.156117.85170.005555555555555556Cone search capability for table J/AJ/167/208/table4 (APO-K2 with [Fe/H]<(-1))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/167/208/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/167/208/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/167/208/table4?GETtext/xml+votable180.050000true254.5286-21.77220.0055555555555555564/17 22 922-923 933-935 944-946 5/73 75-76 78 94 101-102 113 115-116 266 1063 1067-1069 1074-1075 1086 1155 1165 1168 1170 1174 1176 1178-1179 1182-1183 1200 1204 1225-1226 3645-3647 3683 3704 3706 3729-3731 3760 3788-3789 3792 4287 4322-4323 4326-4327 4330-4331 4334 4499 4503 4507 4509 4532 4537 4556 4577 4579 4582-4583 4587-4588 4590 4612-4613 4616-4617 4622-4623 4634 4642-4643 4647 4653 4656 4665 4674-4675 4680-4681 4683-4685 4687-4688 4690 4696 4698 5870-5871 5882 6060-6061 6072 6074 6402 6404 6406 6409 6411-6413 6415 6423-6424 6428 6462 6528 6542 6563-6564 6569-6570 6735 6743 6757 6764 6769 6773 6780 6852 6855 6857 6859 6877 6921 7302 7329 7331 7337 10749 11094 11182 11192 12007 12125 6/261 263 267 270-271 289 291 308 310-311 316-317 319-320 322-323 328-330 334-337 339-342 346 349 368-370 375 381 383 388-389 391 397 400 402-403 412-413 415 437 439 448-450 456 458-459 468 470-473 475-478 480-482 484 1026 1029-1031 1033 1041 1044 1050 1053 1055 1058-1059 1072-1073 1077 1098 4246-4247 4250-4251 4262-4263 4280 4282-4283 4285-4287 4290 4295 4306 4312-4314 4318-4322 4327-4328 4330-4331 4333 4335-4336 4340-4341 4343 4488 4490-4491 4512 4522-4523 4526-4527 4531 4536-4538 4613 4615 4624 4627 4629 4631-4632 4634-4635 4637-4639 4645 4657-4659 4665 4668-4669 4671 4685 4687-4688 4708 4710-4711 4720-4721 4723-4724 4726-4727 4756-4757 4805 4820 4865-4869 4871 4880 4883 4898-4899 4908 4992 14567 14573 14575 14577-14579 14730-14731 14744 14746 14750-14751 14792 14794-14795 14822 14828 14830-14831 14914-14915 15044-15045 15057 15059-15062 15160 15172-15174 15176 15178 15200 15232 17142-17143 17145 17147 17313-17318 17328-17330 17333-17334 17342 17352 17354 17376 17379 17381-17383 17388-17389 17394 17400 17975 17991 18003 18006 18009-18011 18018-18020 18023-18024 18026-18027 18032 18034-18035 18040-18041 18044-18045 18113-18116 18118 18121 18123 18125-18127 18132-18133 18135 18137-18139 18141-18143 18145 18160-18161 18163-18165 18167 18171-18172 18175 18178-18179 18184-18185 18222-18223 18228 18230 18233 18236 18304-18306 18313-18315 18320 18322 18336-18337 18340-18342 18345-18347 18432-18433 18435-18436 18438-18439 18441 18443-18444 18446-18447 18456 18458-18459 18474-18476 18478-18479 18481-18484 18486 18498 18510-18511 18516-18517 18525 18532-18533 18542 18544 18549 18551 18560-18561 18564-18565 18567 18577-18582 18584-18586 18599 18605 18608-18610 18616-18617 18620-18621 18630-18633 18635-18636 18642-18643 18648-18649 18652 18657-18659 18664-18665 18668 18690-18692 18694-18695 18705 18707 18709-18710 18712-18713 18715-18716 18718 18728-18729 18744 18747 18766 18790 18796-18797 18799 18821 18823 18832-18833 18836-18837 18880-18882 18884-18885 19537 19540 19713 23471 23519 23522-23523 23526 23532-23533 23538 23542 23546-23548 23550 24105 24110 24113-24115 24120-24121 24193 24199-24200 24202 24204-24206 24216 24222-24224 24227 24229-24230 24233 24236 24238 24249 24251 24253-24254 24266 24927 25425-25426 25428 25430 25433 25533 25543 25549 25551 25563 25576-25577 25579-25580 25582 25585-25586 25589-25593 25595 25597 25603 25605 25607 25612 25614-25615 25622 25628 25630-25633 25641-25643 25656-25657 25659 25667 25670 25672-25673 25675-25678 25681 25683-25684 25686-25687 25689-25691 25701 25703-25704 25706 25709 25722-25723 25726 25728-25729 25732 25734 25748-25749 25757-25759 25780-25781 25802 25809 25812 25814-25815 25824 25843 25846 25852-25854 26017 26024 26118 26121 26124 26162-26163 26172 26174 26177-26179 26193 26196 26241 26243 26246-26247 26260 26262-26266 26268 26270 26273-26275 26284 26905 26907 26910-26911 26928-26929 26931-26932 26945 26958 26961 26963 26971 26978 26980-26981 26984 26986 26990-26991 26996-26997 27002-27003 27006-27007 27025 27045 27047 27049 27051-27052 27054-27055 27061 27066 27075 27080-27082 27084 27087 27089 27091 27097-27099 27101 27104-27106 27125 27223 27392-27394 27396-27397 27412 27414 27417-27418 27426-27427 27432-27433 27442-27443 27445-27450 27452 27456-27457 27459-27460 27462 27464 27466 27469 27471 27480 27482-27483 27486 27488-27489 27491-27492 27494-27495 27498-27501 27504 27513-27517 27525 27536-27537 27542-27543 27548-27549 27584-27586 27590-27591 27596-27597 27600 27602 27608 27657-27660 27662-27663 27680-27681 27683 27693-27695 27704 27706 27784 27786-27787 27810 28192 28826-28827 28838 28843 28850 28896 28941 28943 28952 28954 28959 28965 28981 28996 29005-29006 29024 29026 29187-29188 29195 29207 29212-29214 29221 29226 29231 29233 29250 29256 29281 29285 29292 29295 29304-29305 29321 29328-29329 29345 29353-29355 29379 42846 42862 42865 42868-42870 42877 42909 42929 42932-42933 42935 42941 42943 42946 42948 42952-42954 42978-42979 42984-42986 42989 42994 43002 44304-44305 44307-44308 44310-44311 44317 44319 44357-44358 44360-44362 44365-44367 44388 44391 44717 44719 44722-44723 44732-44734 44774 44776-44777 44779-44780 44782 48022-48023 48046 48056 48059 48072 48478 48511 48596-48597 48599 48605 48607https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/167/208?format=asciiInfrareddefaultJ/AJ/167/208/table1APO-K2 RGB sampleAPOGEEAPOGEE Identifiermeta.idcharSimbadSimbad column added by the CDSmeta.ref.urlcharSFWGalaxia selection function weighting (3)phys.masscharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEPICEcliptic Plane Input Catalog (EPIC) identifiermeta.id;meta.mainlongGaiaEDR3Gaia EDR3 identifier [source_id]meta.idRAJ2000[8/360] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-31/28] Declination (J2000)degpos.eq.dec;meta.mainGLON[0/360] Galactic longitudedegpos.galactic.lonGLAT[-67/66] Galactic latitudedegpos.galactic.latfloatRkpcGalactocentric R positionkpcpos.distance;pos.galactocentriccharZkpcGalactocentric Z positionkpcpos.cartesian.z;pos.galacticcharTeff[3726/5374] APOGEE calibrated effective temperatureKphys.temperature.effectiveintTeff-u[3643/5326] APOGEE uncalibrated effective temperatureKphys.temperature.effective;stat.uncalibinte_Teff[4/161] Uncertainty in TeffKstat.error;phys.temperature.effectiveintlogg[0.9/4.61] APOGEE calibrated log surface gravitylog(cm.s**-2)phys.gravityfloatlogg-u[1.01/4.46] APOGEE uncalibrated log surface gravitylog(cm.s**-2)phys.gravity;stat.uncalibfloate_logg[0.02/0.33] Uncertainty in logglog(cm.s**-2)stat.errorfloat[Fe/H][-0.999/0.419] APOGEE log Iron abundance relative to Hydrogenlog(Sun)phys.abund.Fe;arith.ratiofloate_[Fe/H][0.006/0.043] Uncertainty in [Fe/H]log(Sun)stat.error;phys.abund.Fefloat[a/M][0.0/0.387] APOGEE log {alpha}-element/Metal abundance ratiolog(Sun)phys.abund.Zfloate_[a/M][0.003/0.509] Uncertainty in [a/M]log(Sun)stat.errorfloataFlag[-1/1] The {alpha} flag (1)meta.codeintMstar[0.6/2.59] Stellar mass, solar units (2)solMassmeta.unit;phys.massfloate_Mstar[0.0/1.98] Uncertainty in MstarsolMassstat.errorfloatRstar[3.75/31.41] Stellar radius (2)solRadphys.size.radiusfloate_Rstar[0.01/9.39] Uncertainty in MstarsolRadstat.errorfloatlogg-seis[1.59/3.32] Stellar log surface gravity (2)log(cm.s**-2)phys.gravityfloate_logg-seis[0.0/0.06] Uncertainty in logg-seislog(cm.s**-2)stat.errorfloatnumax[5.1/257.0] frequency of maximum acoustic poweruHzem.freqfloate_numax[0.0/2.3] Uncertainty in numaxuHzstat.errorfloatdeltanu[1.0/18.04] Large frequency-spacinguHzem.freq;src.varfloate_deltanu[0.0/0.32] Uncertainty in deltanuuHzstat.errorfloatAge[0.5/74.2] AgeGyrtime.agefloate_Age[0.1/64.4] Lower uncertainty in AgeGyrstat.error;time.agefloatE_Age[0.1/490.8] Upper uncertainty in AgeGyrstat.error;stat.maxfloatAge-mode[0.3/30.0] Modal AgeGyrtime.agefloat[O/Fe]APOGEE log Oxygen abundance relative to Ironlog(Sun)phys.abund.Zchare_[O/Fe]Uncertainty in [O/Fe]log(Sun)stat.error;phys.abundcharJ/AJ/167/208/table2Re-calibrated APOKASC-2 RGB sampleSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintKICKepler Input Catalog identifiermeta.id;meta.mainintAPOGEEAPOGEE Identifiermeta.idcharGaiaEDR3Gaia EDR3 identifier [source_id]meta.idRAJ2000[280/302] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[36/53] Declination (J2000)degpos.eq.dec;meta.mainGLON[68/85] Galactic longitudedegpos.galactic.lonGLAT[5/22] Galactic latitudedegpos.galactic.latfloatRkpc[7.549/11.464] Galactocentric R positionkpcpos.distance;pos.galactocentricfloatZkpc[0.058/2.619] Galactocentric Z positionkpcpos.cartesian.z;pos.galacticfloatTeff[3854/5140] APOGEE calibrated effective temperatureKphys.temperature.effectiveintTeff-u[3773/5096] APOGEE uncalibrated effective temperatureKphys.temperature.effective;stat.uncalibinte_Teff[4/22] Uncertainty in TeffKstat.error;phys.temperature.effectiveintlogg[1.17/3.42] APOGEE calibrated log surface gravitylog(cm.s**-2)phys.gravityfloatlogg-u[1.26/3.48] APOGEE uncalibrated log surface gravitylog(cm.s**-2)phys.gravity;stat.uncalibfloate_logg[0.02/0.05] Uncertainty in logglog(cm.s**-2)stat.errorfloat[Fe/H][-0.994/0.401] APOGEE log Iron abundance relative to Hydrogenlog(Sun)phys.abund.Fe;arith.ratiofloate_[Fe/H][0.006/0.017] Uncertainty in [Fe/H]log(Sun)stat.error;phys.abund.Fefloat[a/M][0.0/0.324] APOGEE log {alpha}-element/ Metal abundance ratiolog(Sun)phys.abund.Zfloate_[a/M][0.003/0.179] Uncertainty in [a/M]log(Sun)stat.errorfloataFlag[-1/1] The {alpha} flag (1)meta.codeintMstar[0.61/2.19] Stellar mass, solar units (2)solMassmeta.unit;phys.massfloate_Mstar[0.03/0.84] Uncertainty in MstarsolMassstat.errorfloatRstar[3.6/53.9] Stellar radius, solar units (2)solRadmeta.unit;phys.size.radiusfloate_Rstar[0.05/3.71] Uncertainty in MstarsolRadstat.errorfloatlogg-seis[1.17/3.31] Stellar log surface gravity (2)log(cm.s**-2)phys.gravityfloate_logg-seis[54.39/212.12] Uncertainty in logg-seislog(cm.s**-2)stat.errorfloatnumax[2.0/249.8] frequency of maximum acoustic poweruHzem.freqfloate_numax[0.0/11.1] Uncertainty in numaxuHzstat.errorfloatdeltanu[0.45/18.78] Large frequency-spacinguHzem.freq;src.varfloate_deltanu[0.0/0.86] Uncertainty in deltanuuHzstat.errorfloatAge[0.6/60.6] AgeGyrtime.agefloate_Age[0.1/38.7] Lower uncertainty in AgeGyrstat.error;time.agefloatE_Age[0.1/149.0] Upper uncertainty in AgeGyrstat.error;stat.maxfloatAge-mode[0.5/30.0] Modal AgeGyrtime.agefloatJ/AJ/167/208/table3APO-K2 RC sampleGaiaEDR3Gaia EDR3 identifier [source_id]meta.idSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEPICEcliptic Plane Input Catalog (EPIC) identifiermeta.id;meta.mainlongRAJ2000[9/360] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-31/28] Declination (J2000)degpos.eq.dec;meta.mainGLON[0/360] Galactic longitudedegpos.galactic.lonGLAT[-67/66] Galactic latitudedegpos.galactic.latfloatTeff[3726/5374] APOGEE calibrated effective temperatureKphys.temperature.effectiveintTeff-u[3643/5326] APOGEE uncalibrated effective temperatureKphys.temperature.effective;stat.uncalibinte_Teff[4/161] Uncertainty in TeffKstat.error;phys.temperature.effectiveintlogg[0.9/3.27] APOGEE calibrated log surface gravitylog(cm.s**-2)phys.gravityfloatlogg-u[1.01/3.28] APOGEE uncalibrated log surface gravitylog(cm.s**-2)phys.gravity;stat.uncalibfloate_logg[0.02/0.33] Uncertainty in logglog(cm.s**-2)stat.errorfloat[Fe/H][-0.999/0.505] APOGEE log Iron abundance relative to Hydrogenlog(Sun)phys.abund.Fe;arith.ratiofloate_[Fe/H][0.006/0.039] Uncertainty in [Fe/H]log(Sun)stat.error;phys.abund.Fefloat[a/M][0.0/0.387] APOGEE log {alpha}-element/Metal abundance ratiolog(Sun)phys.abund.Zfloate_[a/M][0.003/0.284] Uncertainty in [a/M]log(Sun)stat.errorfloat[O/Fe][-0.531/0.813] APOGEE log Oxygen abundance relative to Ironlog(Sun)phys.abund.Zfloate_[O/Fe][0.007/0.129] Uncertainty in [O/Fe]log(Sun)stat.error;phys.abundfloataFlag[-1/1] The {alpha} flag (1)meta.codeintMstar[0.6/2.59] Stellar mass, solar units (2)solMassmeta.unit;phys.massfloate_Mstar[0.01/1.98] Uncertainty in MstarsolMassstat.errorfloatRstar[5.35/31.41] Stellar radius, solar units (2)solRadmeta.unit;phys.size.radiusfloate_Rstar[0.04/9.39] Uncertainty in MstarsolRadstat.errorfloatlogg-seis[1.59/3.12] Stellar log surface gravity (2)log(cm.s**-2)phys.gravityfloate_logg-seis[0.0/0.06] Uncertainty in logg-seislog(cm.s**-2)stat.errorfloatnumax[5.1/155.8] frequency of maximum acoustic poweruHzem.freqfloate_numax[0.0/2.0] Uncertainty in numaxuHzstat.errorfloatdeltanu[1.0/12.74] Large frequency-spacinguHzem.freq;src.varfloate_deltanu[0.0/0.32] Uncertainty in deltanuuHzstat.errorfloatAge[0.4/77.6] AgeGyrtime.agefloate_Age[0.1/68.6] Lower uncertainty in AgeGyrstat.error;time.agefloatE_Age[0.1/591.1] Upper uncertainty in AgeGyrstat.error;stat.maxfloatAge-mode[0.3/30.0] Modal AgeGyrtime.agefloatAPOGEEAPOGEE Identifiermeta.idcharRkpcGalactocentric R positionkpcpos.distance;pos.galactocentriccharZkpcGalactocentric Z positionkpcpos.cartesian.z;pos.galacticcharJ/AJ/167/208/table4APO-K2 with [Fe/H]<(-1)SimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEPICEcliptic Plane Input Catalog (EPIC) identifiermeta.id;meta.mainlongGaiaEDR3Gaia EDR3 identifier [source_id]meta.idRAJ2000[9/357] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-30/25] Declination (J2000)degpos.eq.dec;meta.mainGLON[0/360] Galactic longitudedegpos.galactic.lonGLAT[-67/65] Galactic latitudedegpos.galactic.latfloatRkpc[1.668/14.783] Galactocentric R positionkpcpos.distance;pos.galactocentricfloatZkpc[-6.35/9.91] Galactocentric Z positionkpcpos.cartesian.z;pos.galacticfloatTeff-u[4382/5741] APOGEE uncalibrated effective temperatureKphys.temperature.effective;stat.uncalibinte_Teff-u[10/706] Uncertainty in TeffKstat.errorintlogg-u[1.2/3.79] APOGEE uncalibrated log surface gravitylog(cm.s**-2)phys.gravity;stat.uncalibfloate_logg-u[0.03/1.14] Uncertainty in logglog(cm.s**-2)stat.errorfloat[Fe/H][-1.998/-1.0] APOGEE log Iron abundance relative to Hydrogenlog(Sun)phys.abund.Fe;arith.ratiofloate_[Fe/H][0.009/0.099] Uncertainty inlog(Sun)stat.error;phys.abund.Fefloat[a/M][0.054/0.385] APOGEE log {alpha}-element/ Metal abundance ratiolog(Sun)phys.abund.Zfloate_[a/M][0.011/0.271] Uncertainty inlog(Sun)stat.errorfloat[O/Fe]APOGEE log Oxygen abundance relative to Ironlog(Sun)phys.abund.Zchare_[O/Fe]Uncertainty in [O/Fe]log(Sun)stat.error;phys.abundcharMstar[0.6/2.25] Stellar mass, solar units (1)solMassmeta.unit;phys.massfloate_Mstar[0.02/0.77] Uncertainty in MstarsolMassstat.errorfloatRstar[4.4/25.25] Stellar radius (1)solRadphys.size.radiusfloate_Rstar[0.05/3.91] Uncertainty in MstarsolRadstat.errorfloatlogg-seis[1.71/3.1] Stellar log surface gravity (1)log(cm.s**-2)phys.gravityfloate_logg-seis[0.0/0.04] Uncertainty in logg-seislog(cm.s**-2)stat.errorfloatnumax[6.6/152.9] frequency of maximum acoustic poweruHzem.freqfloate_numax[0.0/1.8] Uncertainty in numaxuHzstat.errorfloatdeltanu[1.2/13.87] Large frequency-spacinguHzem.freq;src.varfloate_deltanu[0.0/0.23] Uncertainty in deltanuuHzstat.errorfloatAge[0.5/37.6] AgeGyrtime.agefloate_Age[0.1/21.4] Lower uncertainty in AgeGyrstat.error;time.agefloatE_Age[0.1/127.2] Upper uncertainty in AgeGyrstat.error;stat.maxfloatAge-mode[0.4/30.0] Modal AgeGyrtime.agefloatAPOGEEAPOGEE Identifiermeta.idchar