J/ApJ/888/43ivo://CDS.VizieR/J/ApJ/888/43doi:10.26093/cds/vizier.18880043CDSClaytor Z.R.van Saders J.L.Santos A.R.G.Garcia R.A.Mathur S.,Tayar J.Pinsonneault M.H.Shetrone M.2022-07-07T12:24:38Z2021-07-13T13:34:33ZCDS support team

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

cds-question@unistra.frstellar-ageschemical-abundancesstellar-massesstellar-radiiastronomical-modelsWe use models of stellar angular momentum evolution to determine ages for ~500 stars in the APOGEE-Kepler Cool Dwarfs sample. We focus on lower-main-sequence stars, where other age-dating tools become ineffective. Our age distributions are compared to those derived from asteroseismic and giant samples and solar analogs. We are able to recover gyrochronological ages for old, lower-main-sequence stars, a remarkable improvement over prior work in hotter stars. Under our model assumptions, our ages have a median relative uncertainty of 14%, comparable to the age precision inferred for more massive stars using traditional methods. We investigate trends of Galactic {alpha}-enhancement with age, finding evidence of a detection threshold between the age of the oldest {alpha}-poor stars and that of the bulk {alpha}-rich population. We argue that gyrochronology is an effective tool reaching ages of 10-12Gyr in K and early M dwarfs. Finally, we present the first effort to quantify the impact of detailed abundance patterns on rotational evolution. We estimate a ~15% bias in age for cool, {alpha}-enhanced (+0.4dex) stars when standard solar-abundance-pattern rotational models are used for age inference, rather than models that appropriately account for {alpha}-enrichment.2020ApJ...888...43Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/888/43CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)V/117 : Geneva-Copenhagen Survey of Solar neighbourhood (Holmberg+, 2007)V/133 : Kepler Input Catalog (Kepler Mission Team, 2009)I/345 : Gaia DR2 (Gaia Collaboration, 2018)III/284 : APOGEE-2 data from DR16 (Johnsson+, 2020)J/A+AS/129/237 : G and K dwarfs abundances (Feltzing+ 1998)J/A+A/410/527 : Abundances in the Galactic disk (Bensby+, 2003)J/A+A/397/147 : Activity-rotation relationship in stars (Pizzolato+ 2003)J/ApJ/687/1264 : Age estimation for solar-type dwarfs (Mamajek+, 2008)J/ApJ/691/342 : griBVI photometry in M37 (Hartman+, 2009)J/AJ/142/112 : KIC photometric calibration (Brown+, 2011)J/ApJ/733/L9 : Stellar rotation for 71 NGC 6811 members (Meibom+, 2011)J/ApJ/743/48 : Stars with rot. periods and X-ray luminosities (Wright+, 2011)J/ApJ/753/90 : Parameters of K5 and later type Kepler stars (Mann+, 2012)J/ApJ/765/L41 : Asteroseismic classification of KIC objects (Stello+, 2013)J/ApJ/776/67 : Rotational tracks (van Saders+, 2013)J/A+A/562/A71 : Abundances of solar neighbourhood dwarfs (Bensby+, 2014)J/ApJ/780/159 : Rotation-mass-age relationship of old stars (Epstein+, 2014)J/A+A/572/A34 : Pulsating solar-like stars in Kepler (Garcia+, 2014)J/ApJS/211/24 : Rotation periods of Kepler MS stars (McQuillan+, 2014)J/ApJ/807/82 : Rotational velocities of APOKASC red giants (Tayar+, 2015)J/ApJ/822/47 : K2 rotation periods for 65 Hyades members (Douglas+, 2016)J/AJ/151/144 : ASPCAP weights for APOGEE chemical elements (Garcia+, 2016)J/MNRAS/456/3655 : Masses and ages of red giants (Martig+, 2016)J/ApJ/821/93 : Rotation & Galactic kinematics of mid M dwarfs (Newton+, 2016)J/AJ/152/113 : Pleiades members with K2 LCs. I. Periods (Rebull+, 2016)J/A+A/605/A111 : Surface rotation of Kepler red giant stars (Ceillier+, 2017)J/A+A/601/A67 : Kepler solar-type stars modeling (Creevey+, 2017)J/ApJS/229/30 : Revised properties of Q1-17 Kepler targets (Mathur+, 2017)J/ApJ/839/92 : Praesepe members with K2 light curve data (Rebull+, 2017)J/ApJS/233/23 : APOKASC catalog of KIC dwarfs and subgiants (Serenelli+, 2017)J/ApJ/862/33 : Expanded membership catalog for NGC752 (Agueros+, 2018)J/ApJ/866/99 : Radii of KIC stars & planets using Gaia DR2 (Berger+, 2018)J/MNRAS/475/5487 : Stellar properties of KIC stars (Silva Aguirre+, 2018)J/A+A/624/A19 : GALAH survey, chemodynamical analyse with TGAS (Buder+, 2019)J/ApJ/879/49 : Rot. periods for 171 Gaia members of NGC 6811 (Curtis+, 2019)J/ApJS/244/21 : Surface rot. & activity of Kepler stars. I. (Santos+, 2019)J/ApJS/241/12 : Asteroseismic Target List (ATL) for TESS (Schofield+, 2019)J/ApJ/871/174 : Kepler rapid rotators and Ks-band excesses (Simonian+, 2019)J/A+A/624/A78 : Masses and ages of 1059 HARPS-GTO stars (Delgado Mena+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/888/43https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/888/43http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/888/43https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/888/43https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/888/43http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/888/43GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/888/43/table3 (The input data and derived rotation-based ages for stars in the APOGEE-Kepler cool dwarfs sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/888/43/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/888/43/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/888/43/table3?GETtext/xml+votable180.050000true291.48812537.07308330.0055555555555555564/935 946 5/3645-3646 3688 3690-3691 3693 3730 3732-3734 3739 3776 3779 3782 3792 6/14573 14575 14578-14579 14588-14589 14591 14730-14731 14733-14735 14744 14746 14750-14751 14756-14757 14759 14770-14771 14776-14777 14794 14816-14817 14827 14830 14914-14915 14918-14919 14924-14925 14927 14940-14942 14949 14954-14955 15040-15041 15044 15057 15059-15062 15110 15113-15115 15123 15126-15127 15132-15133 15154 15172 15174https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/888/43?format=asciidefaultJ/ApJ/888/43/table3The input data and derived rotation-based ages for stars in the APOGEE-Kepler cool dwarfs samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintKICKepler Input Catalogmeta.id;meta.mainint2MASS2MASS identifier (HHMMSSss+DDMMSSs; J2000)meta.id.crosscharTeffEffective temperatureKphys.temperature.effectiveinte_TeffUncertainty in TeffKstat.error;phys.temperature.effectiveint[M/H]Bulk metallicityphys.abund.Zfloate_[M/H]Uncertainty in [M/H]stat.error;phys.abundfloat[a/H]log {alpha}-enhancementphys.abundfloate_[a/H]Uncertainty in [a/H]stat.error;phys.abundfloatSpecReference for spectral properties (1)meta.notecharlog(g)log surface gravitylog(cm**2.s**-1)phys.gravityfloate_log(g)? Uncertainty in log(g)log(cm**2.s**-1)stat.errorfloatnullabler_log(g)Reference for log(g) (1)meta.ref;pos.framecharProtRotational period (2)dtime.periodfloate_ProtUncertainty in Prot (2)dstat.errorfloatLum? Luminosity (3)solLumphys.luminosityfloatnullablee_Lum? Lower uncertainty in Lum (3)solLumstat.errorfloatnullableE_Lum? Upper uncertainty in Lum (3)solLumstat.error;stat.maxfloatnullableAgeAge (3)Gyrtime.agefloate_AgeLower uncertainty in Age (3)Gyrstat.error;time.agefloatE_AgeUpper uncertainty in Age (3)Gyrstat.error;stat.maxfloatMassMass (3)solMassphys.massfloate_MassLower uncertainty in Mass (3)solMassstat.error;phys.massfloatE_MassUpper uncertainty in Mass (3)solMassstat.error;stat.maxfloatRadRadius (3)solRadphys.size.radiusfloate_RadLower uncertainty in Rad (3)solRadstat.errorfloatE_RadUpper uncertainty in Rad (3)solRadstat.error;stat.maxfloatAPOGEEDisplay the APOGEE-2 DR16 data (III/284) within 3"meta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPositions from 2MASS names (right ascension part)degpos.eq.ra;meta.main_DEPositions from 2MASS names (declination part)degpos.eq.dec;meta.main