J/AJ/163/229ivo://CDS.VizieR/J/AJ/163/229doi:10.26093/cds/vizier.51630229CDSSpoo T.Tayar J.Frinchaboy P.M.Cunha K.Myers N.Donor J.,Majewski S.R.Bizyaev D.Garcia-Hernandez D.A.Jonsson H.Lane R.R.,Pan K.Longa-Pena P.Roman-Lopes A.2022-10-12T12:16:14Z2022-09-30T07:21:16ZCDS support team

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

cds-question@unistra.fropen-star-clustersgiant-starschemical-abundancesmetallicityeffective-temperatureinfrared-astronomyLarge-scale surveys open the possibility to investigate Galactic evolution both chemically and kinematically; however, reliable stellar ages remain a major challenge. Detailed chemical information provided by high-resolution spectroscopic surveys of the stars in clusters can be used as a means to calibrate recently developed chemical tools for age-dating field stars. Using data from the Open Cluster Abundances and Mapping survey, based on the Sloan Digital Sky Survey/Apache Point Observatory Galactic Evolution Experiment 2 survey, we derive a new empirical relationship between open cluster stellar ages and the carbon-to-nitrogen ([C/N]) abundance ratios for evolved stars, primarily those on the red giant branch. With this calibration, [C/N] can be used as a chemical clock for evolved field stars to investigate the formation and evolution of different parts of our Galaxy. We explore how mixing effects at different stellar evolutionary phases, like the red clump, affect the derived calibration. We have established the [C/N]-age calibration for APOGEE Data Release 17 (DR17) giant star abundances to be log[Age(yr)]_DR17_=10.14{+/-}0.08+2.23{+/-}0.19[C/N], usable for 8.62<=log[Age(yr)]<=9.82, derived from a uniform sample of 49 clusters observed as part of APOGEE DR17 applicable primarily to metal-rich, thin- and thick-disk giant stars. This measured [C/N]-age APOGEE DR17 calibration is also shown to be consistent with asteroseismic ages derived from Kepler photometry.2022AJ....163..229Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/163/229CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIII/284 : APOGEE-2 data from DR16 (Johnsson+, 2020)V/154 : Sloan Digital Sky Surveys (SDSS), Release 16 (DR16) (Ahumada+, 2020)J/A+A/354/169 : Metal-poor field stars abundances (Gratton+, 2000)J/ApJS/221/24 : SDSS-III APOGEE H-band spectral line lists (Shetrone+, 2015)J/AJ/151/144 : ASPCAP weights for 15 APOGEE chemical elements (Garcia+, 2016)J/ApJ/832/121 : 4yr RV survey red giant in eclipsing binaries (Gaulme+, 2016)J/MNRAS/456/3655 : Masses and ages of red giants (Martig+, 2016)J/ApJ/823/114 : The Cannon; a new approach to determine masses (Ness+, 2016)J/ApJ/844/102 : KIC star parallaxe from asteroseismology vs Gaia (Huber+, 2017)J/MNRAS/465/3203 : GALAH observational overview (Martell+, 2017)J/AJ/156/142 : Precision cluster abund. APOGEE using SDSS DR14 (Donor+, 2018)J/AJ/156/126 : Stellar parameters & abund. BACCHUS analysis (Jonsson+, 2018)J/ApJS/239/32 : APOKASC-2 catalog of Kepler evolved stars (Pinsonneault+, 2018)J/ApJ/872/137 : Abundances red clump & RGB stars with APOGEE (Shetrone+, 2019)J/A+A/634/A34 : Complete line list and solar values (Baratella+, 2020)J/A+A/640/A1 : Portrait Galactic disc (Cantat-Gaudin+, 2020)J/AJ/159/199 : OCCAM. IV. Open cluster abund. using APOGEE DR16 (Donor+, 2020)J/ApJ/895/52 : EW & chemical abundances in 211 stars with HARPS (Spina+, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/163/229https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/163/229http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/163/229https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/163/229https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/163/229http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/163/229GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/163/229/table2 (Mean [C/N] DR17 abundance for full sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/163/229/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/163/229/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/163/229/table2?GETtext/xml+votable180.050000true80.1330.5740.005555555555555556Cone search capability for table J/AJ/163/229/table3 (Full calibration cluster stellar data from APOGEE DR17)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/163/229/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/163/229/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/163/229/table3?GETtext/xml+votable180.050000true79.97437530.58597220.0055555555555555565/3688 6/1302 1308 1335 1461 1464 1481 1483 1512 1514 1781-1782 2433 2436 2438 3015 3046 3056-3057 3062-3063 3076 3089 3091 3149 3168-3169 3277 3633 4075-4076 4078-4079 4298 6149 14014 14175 14225 14573 14575 14641 14644 14749 14751 15121 15379 15385 15417 20562 20763 20814 20863 20903 20909 20957 21557 21567 22093 22130 22433 22887 23612 23638 23677 23766 23772 23861 23906 24121 24330 24344-24345 24376 24465-24466 24489 24491 24500 24502 24544 29045 29728 29730 30215 37724 37835 39895 39901 40625 42387 42961 42964 43034 43140https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/163/229?format=asciiInfrareddefaultJ/AJ/163/229/table2Mean [C/N] DR17 abundance for full samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameCluster namemeta.id;meta.maincharprimaryAge[8.35/9.86] log cluster age (1)log(yr)time.agefloatFe/H[-0.53/0.32] log metallicityphys.abund.ZfloatC/N[-0.71/-0.16] log Carbon to Nitrogen ratiophys.abundfloate_C/N[0/0.08] Error on C/Nphys.abundfloatMemb[1/65] DR17 membershipmeta.numberintNstarsNumber of stars observed (table3)meta.numberintnullableSimbadNameSimbad column added by the CDSmeta.idcharnullable_RAPositon from SIMBAD (right ascension part)degpos.eq.ra;meta.main_DEPositon from SIMBAD (declination part)degpos.eq.dec;meta.mainJ/AJ/163/229/table3Full calibration cluster stellar data from APOGEE DR172MASS2MASS identifiermeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameCluster namemeta.id.parentcharTeff[3515/5341] APOGEE DR17 effective temperatureKphys.temperature.effectiveinte_Teff[3/24] Uncertainty in TeffKstat.error;phys.temperature.effectiveintlogg[0.76/3.29] APOGEE DR17 Surface Gravitylog(cm.s**-2)phys.gravityfloatRCflagRed Clump flag (1)meta.codechare_logg[0.02/0.04] Uncertainty in logglog(cm.s**-2)stat.errorfloat[Fe/H][-0.55/0.41] APOGEE DR17 [Fe/H]log(Sun)phys.abund.Fefloate_[Fe/H][0.01] Uncertainty in [Fe/H]log(Sun)stat.error;phys.abund.Fefloat[C/N][-1.03/0.15] APOGEE DR17 [C/N]log(Sun)phys.abundfloate_[C/N][0.01/0.05] Uncertainty in [C/N]log(Sun)phys.abundfloat_RAPosition from 2MASS name (right ascension part)degpos.eq.ra;meta.main_DEPosition from 2MASS name (declination part)degpos.eq.dec;meta.main