J/ApJ/889/157ivo://CDS.VizieR/J/ApJ/889/157doi:10.26093/cds/vizier.18890157CDSChen X.Ge Z.Chen Y.Bi S.Yu J.Li T.Li Y.Ferguson J WZhang J.,Wu Y.2022-07-08T07:09:44Z2021-08-10T09:42:05ZCDS support team

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

cds-question@unistra.frchemical-abundancesstellar-agesstellar-massesPrecise stellar ages of stars are necessary to study the evolution of the Milky Way. The age determination is significantly affected by C and O abundances of stars due to their contribution to the overall metallicity and opacity. On the basis of C and O abundances derived from high-resolution observations, we determine the ages of 148 FGK-type dwarfs in the solar neighborhood by considering C and O enhancements individually. Our results show that using C and O enhancements individually could affect the age determination of the high-{alpha} population, especially for stars with [O/{alpha}]>0.2dex, making them about 1Gyr younger compared to the results using traditional {alpha}-enhanced models. This results in a steeper slope in the age-[{alpha}/Fe] relation for the high-{alpha} population (changes from 0.0339+/-0.0075 to 0.0436+/-0.0086), indicating a higher formation rate. We find no tight relation between age and [{alpha}/Fe] or [O/Fe] in the high-{alpha} populations. The distribution of space velocity for young {alpha}-rich stars shows that they are more likely characterized to the low-{alpha} populations.2020ApJ...889..157Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/889/157CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/133 : Kepler Input Catalog (Kepler Mission Team, 2009)I/347 : Distances to 1.33 billion stars in Gaia DR2 (Bailer-Jones+, 2018)I/345 : Gaia DR2 (Gaia Collaboration, 2018)J/A+AS/141/371 : Low-mass stars evolutionary tracks (Girardi+, 2000)J/A+A/361/1023 : Evolution model for {alpha}-enhanced stars (Salasnich+ 2000)J/A+A/377/911 : Age-metallicity relations (Feltzing+, 2001)J/A+A/433/185 : Abundance analysis of 102 F and G dwarfs (Bensby+, 2005)J/MNRAS/367/1329 : Elemental abundances for 176 stars (Reddy+, 2006)J/A+A/512/A48 : HARPS RVs of HD125612, HD215497, HIP5158 (Lo Curto+, 2010)J/A+A/530/A138 : Geneva-Copenhagen survey re-analysis (Casagrande+, 2011)J/A+A/526/A112 : Radial velocities of HARPS metal-poor sample (Santos+, 2011)J/A+A/545/A32 : Chemical abundances of 1111 FGK stars (Adibekyan+, 2012)J/A+A/562/A71 : Abundances of solar neighbourhood dwarfs (Bensby+, 2014)J/A+A/568/A25 : C and O abundances in stellar populations (Nissen+, 2014)J/A+A/576/A89 : O abundances from HARPS in F-G stars (Bertran de Lis+, 2015)J/ApJ/831/20 : C/O and Mg/Si for solar neighborhood's stars (Brewer+, 2016)J/ApJS/225/32 : Extended abundance analysis of cool stars (Brewer+, 2016)J/ApJ/833/225 : -2.6<=[Fe/H]<=0.2 F & G dwarfs. II. Abundances (Zhao+, 2016)J/A+A/599/A96 : [C/H] abundances of 1110 stars (Suarez-Andres+, 2017)J/ApJ/860/49 : Opt. spectrosc. of young {alpha}-rich stars (Matsuno+, 2018)J/MNRAS/475/5487 : Stellar properties of KIC stars (Silva Aguirre+, 2018)J/A+A/624/A19 : GALAH, chemodynamical analyse with TGAS (Buder+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/889/157https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/889/157http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/889/157https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/889/157https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/889/157http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/889/157GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/889/157/stars (Atmospheric parameters, element abundances (Table 2) and kinematic parameters (Table 5))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/889/157/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/889/157/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/889/157/stars?GETtext/xml+votable180.050000true334.65210898.44582250.0055555555555555566/154 200 742 944 1341 1530 1669 2308 2315 2923 3102 3372 4376 4854 5401 5484 5718 5895 5929 6066 6226 6287 6308 6409 6539 6792 6926 6941 7141 7868 7978 8210 8466 9026 9403 9679 9835 10375 10812 11177 11363 11633 12846 13025 13625 13922 14551 14721 14765 14850 14931 14938 16185 16652 16883 17206 17425 17730 17768 18139 18548 18711 19003 19327 19347 20739 21550 21696 21809 22036 22120 22157 22180 22527 22590 22594 22654 23015 23096 23190 23382 23780 23961 24016 24178 24212 24713 24824 24924 25102 25192 25225 25444 25766 25820 25862 25966 26062 26379 26975 27006 27018 27314 28336 29513 29765 29833 30233 30579 31279 32372 33273 33456 33630 35954 36029 36365 36635 37232 37573 37595 37831 38238 39030 39257 39647 39692 39854 39984 40078 40101 40442 40692 40716 40921 41591 41607 41721 41912 41941 42700 43001 43068 43258 43760 43813 43911 44131 44243 44542 44653 44740 44910 45121 45168 45669 45682 45837 45865 46053 46076 46297 46306 48394 48545 48705https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/889/157?format=asciidefaultJ/ApJ/889/157/starsAtmospheric parameters, element abundances (Table 2) and kinematic parameters (Table 5)SimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDIdentifiermeta.id;meta.maincharTeff[4841/6600] Effective temperatureKphys.temperature.effectiveinte_Teff[25/130] Lower uncertainty in TeffKstat.error;phys.temperature.effectiveintE_Teff[25/130] Upper uncertainty in TeffKstat.error;stat.maxintlog(g)[3.7/4.7] log surface gravitylog(cm.s**-2)phys.gravityfloate_log(g)[0.03/0.09] Uncertainty in log(g)log(cm.s**-2)stat.errorfloat[Fe/H][-2.5/0.5] Metallicitylog(Sun)phys.abund.Zfloate_[Fe/H][0.01/0.09] Uncertainty in [Fe/H]log(Sun)stat.error;phys.abund.Fefloat[C/Fe][-0.2/0.5] log C/Fe number abundancelog(Sun)phys.abundfloate_[C/Fe][0.02/0.2] Uncertainty in [C/Fe]log(Sun)stat.error;phys.abundfloat[O/Fe][-0.3/0.7] log O/Fe number abundancelog(Sun)phys.abundfloate_[O/Fe][0.03/0.4] Uncertainty in [O/Fe]log(Sun)stat.error;phys.abundfloat[a/Fe][-0.06/0.4] log {alpha}/Fe number abundancelog(Sun)phys.abundfloatRefReference (1)meta.ref;pos.framecharn_Ref"(halo)"meta.notecharMass[0.6/1.4] Stellar masssolMassphys.massfloate_Mass[0/0.04] Lower uncertainty in MasssolMassstat.error;phys.massfloatE_Mass[0/0.06] Upper uncertainty in MasssolMassstat.error;stat.maxfloatAgeCO[0.1/24.5] Age from CO-extreme modelGyrtime.age;meta.modelledfloate_AgeCO[0.04/8.2] Lower uncertainty in AgeCOGyrstat.errorfloatE_AgeCO[0.07/3.7] Upper uncertainty in AgeCOGyrstat.error;stat.maxfloatDist[6/401]? Distancepcpos.distance;pos.heliocentricfloatnullableU[-131/135]? Velocity towards the Galactic anticenter (1)km/sphys.veloc;pos.galacticfloatnullableV[-330/28]? Velocity along galactic rotation (1)km/sphys.velocfloatnullableW[-144/93]? Velocity toward North Galactic Pole (1)km/sphys.veloc;pos.galacticfloatnullableAge[1/22]? Age from traditional {alpha}-enhanced modelGyrtime.agefloatnullablee_Age[0.02/6.5]? Lower uncertainty in AgealphaGyrstat.error;time.agefloatnullableE_Age[0.02/2.4]? Upper uncertainty in AgealphaGyrstat.error;stat.maxfloatnullableSCatDisplay the sample data from Brewer+ 2016, J/ApJ/831/20 ; Zhao+ 2016, J/ApJ/833/225 ; Nissen+ 2014, J/A+A/568/A25 and Adibekyan+ 2012, J/A+A/545/A32meta.ref.urlintnullable_RAPositions from Simbad or from Brewer+, 2016, J/ApJS/225/32 for HTR183-005 (right ascension part)degpos.eq.ra;meta.main_DEPositions from Simbad or from Brewer+, 2016, J/ApJS/225/32 for HTR183-005 (declination part)degpos.eq.dec;meta.main