J/ApJ/877/104ivo://CDS.VizieR/J/ApJ/877/104doi:10.26093/cds/vizier.18770104CDSZhou Y.Yan H.Shi J.Blanco-Cuaresma S.Gao QiPan K.Xu X.,Zhang J.Zhao G.2021-10-15T13:46:18Z2020-12-18T07:27:06ZCDS support team

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

cds-question@unistra.frgiant-starschemical-abundancesvisible-astronomyspectroscopyeffective-temperaturestellar-massesstellar-agesThe discovery of Li-rich giants has introduced a new challenge for standard stellar evolution models. To resolve this issue, the number of this type of object has been rapidly increased through the development of worldwide surveys. Taking advantage of the Large Sky Area Multi-Object Fiber Spectroscopic Telescope survey, 44 new Li-rich giants are reported, which are confirmed with high-resolution observations. Based on the high-resolution and high signal-to-noise spectra, we derived the atmospheric parameters and elemental abundances with the spectral synthesis method. We performed a detailed analysis of their evolutionary stages, infrared excess, projected rotational velocity (vsini), and stellar population. We find that (1) the Li-rich giants concentrate at the evolutionary status of the red giant branch bump, red clump, and asymptotic giant branch; (2) three of them are fast rotators and none exhibit infrared excess. Our results imply that the origins of Li enrichment are most likely to be associated with the extra mixing in the stellar interior, and the external sources might only make a minor contribution. Moreover, various Li-rich episodes take place at different evolutionary stages.2019ApJ...877..104Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/877/104CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/328 : AllWISE Data Release (Cutri+ 2013)I/347 : Distances to 1.33 billion stars in Gaia DR2 (Bailer-Jones+, 2018)I/345 : Gaia DR2 (Gaia Collaboration, 2018)V/153 : LAMOST DR4 catalogs (Luo+, 2018)J/MNRAS/367/1329 : Elemental abundances for 176 stars (Reddy+, 2006)J/A+A/475/1003 : Stellar parameters of G and K giant stars (Hekker+, 2007)J/AJ/137/4282 : Red giant stars in clusters. II. M13 & M92 (Meszaros+, 2009)J/A+A/503/545 : EWs of Li, Na, Fe, Ca in NGC 6397 (Lind+, 2009)J/A+A/545/A32 : Chemical abundances of 1111 FGK stars (Adibekyan+, 2012)J/ApJ/757/109 : Rotational vel. + Li abundance in K giants (Carlberg+, 2012)J/AJ/144/135 : Spitzer 24{mu}m phot. of Hipparcos F stars (Mizusawa+, 2012)J/AJ/150/123 : Catalog of 316 K giant candidates (Rebull+, 2015)J/ApJ/819/135 : Lithium-rich giants in globular clusters (Kirby+, 2016)J/A+A/613/A47 : Radial velocities of 12 evolved stars (Adamow+, 2018)J/A+A/610/A38 : Li enrichment histories of the thick/thin disc (Fu+, 2018)J/ApJ/858/L7 : Red clump stars selected from LAMOST & APOGEE (Ting+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/877/104https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/877/104http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/877/104https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/877/104https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/877/104http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/877/104GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/877/104/table2 (Additional information of the Li-rich giants)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/877/104/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/877/104/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/877/104/table2?GETtext/xml+votable180.050000true14.45765586.845413060.005555555555555556Cone search capability for table J/ApJ/877/104/table1 (Observation information)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/877/104/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/877/104/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/877/104/table1?GETtext/xml+votable180.050000true14.457666786.84541390.0055555555555555566/2398 2419 2830 2929 2934 3195 3306 3387 3652 4070 4090 4096 4300 4783 6163 6293 6964 8425 8593 9398 9452 10845 11407 14054 14288 14332 18923 20454 21924 22241 22248 22329 23753 23862 24324 24337 24475 26401 26853 27610 27718 28195 28531 31424 32297https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/877/104?format=asciiOpticaldefaultJ/ApJ/877/104/table2Additional information of the Li-rich giantsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLAMOSTLAMOST identifier (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharRAJ2000[14.45/357.7] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-4.82/86.9] Declination (J2000)degpos.eq.dec;meta.mainTeff[3780/5188] Effective temperatureKphys.temperature.effectiveinte_Teff[11/134] Error in TeffKstat.error;phys.temperature.effectiveintlogg[0.62/3.33] Log of the surface gravitylog(cm.s**-2)phys.gravityfloate_logg[0.1/0.81] Error in logglog(cm.s**-2)stat.errorfloat[Fe/H][-0.79/0.26] Metallicityphys.abund.Zfloate_[Fe/H][0.02/0.2] Error in Metallicitystat.error;phys.abund.FefloatVt[0.92/2.12] Microturbulence velocitykm/sphys.veloc.microTurbfloate_Vt[0.03/0.28] Error in Vtkm/sstat.errorfloatA(Li)LTE[1.63/4.08] LTE Li abundancephys.abundfloate_A(Li)LTE[0.03/0.22] Error in A(Li)LTEstat.errorfloatA(Li)NLTE[1.65/4.18] NLTE Li abundancephys.abundfloatvsini[0.5/13.7] Projected rotational velocitykm/sphys.veloc.rotatfloate_vsini[0.2/2.0] Error in vsinikm/sstat.error;phys.veloc.rotatfloatRV[-93.62/59.21] Radial velocitykm/sphys.veloc;pos.heliocentricfloate_RV[0.22/1.18] Error in RVkm/sstat.errorfloatTeffph[3652/5119] Photometric effective temperatureKphys.temperature.effectiveintloggph[0.73/2.95] Photometric surface gravitylog(cm.s**-2)phys.gravityfloatU[-79.15/62.84] U Galactic velocitykm/sphys.veloc;pos.cartesian.xfloatV[-71.99/39.74] V Galactic velocitykm/sphys.veloc;pos.cartesian.yfloatW[-41.35/46.64] W Galactic velocitykm/sphys.veloc;pos.cartesian.zfloatPthin[16.3/99.3] Thin disk membership probabilitystat.fit.goodnessfloatPthick[0.7/83] Thick disk Membership probabilitystat.fit.goodnessfloatAge[1.14/11.43] Stellar ageGyrtime.agefloatMass[0.87/2.08] Stellar masssolMassphys.massfloatlogLum[1.47/2.89] Log luminositylog(solLum)phys.luminosityfloate_logLum[0.067/0.131] Error in logLumlog(solLum)stat.errorfloatChi2[-1.7/1.3] chi-square of band 1 and band4 of WISE (1)instr.bandpassfloatPhaseStellar evolutionary phase (2)src.classcharf_PhaseFlag on Phase (3)meta.codecharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/ApJ/877/104/table1Observation informationrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLiDisplay data for this Li-rich giant (link to Table 2)meta.ref.urlcharLAMOSTLAMOST identifier (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharprimaryRAJ2000Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.mainVmag[9.22/12.35] V magnitudemagphot.mag;em.opt.VfloatNexpNumber of exposure x exposure timemeta.numbercharTelTelescopemeta.id;instr.telcharDateDate of observation (UT)time.epochnullableDay2? Second day of observationdtime.epochintnullableDR4Display the LAMOST DR4 data (V/153) within 1"meta.ref.urlintnullable