J/ApJS/251/15ivo://CDS.VizieR/J/ApJS/251/15doi:10.26093/cds/vizier.22510015CDSZong W.Fu J.-N.De Cat P.Wang J.Shi J.Luo A.Zhang H.Frasca A.,Molenda-Zakowicz J.Gray R.O.Corbally C.J.Catanzaro G.Cang T.,Wang J.Chen J.Hou Y.Liu J.Niu H.Pan Y.Tian H.Yan H.Zhang Y.,Zuo H.2026-08-03T07:24:47Z2021-03-03T08:33:37ZCDS support team

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

cds-question@unistra.frmetallicityradial-velocityvisible-astronomyspectroscopysurveysPhase II of the Large Sky Area Multi-Object Fibre Spectroscopic Telescope (LAMOST)-Kepler/K2 survey (LK-MRS), initiated in 2018, aims at collecting medium-resolution spectra (R~7500; hereafter MRS) for more than 50000 stars with multiple visits (~60 epochs) over a period of 5yr (2018 September to 2023 June). We selected 20 footprints distributed across the Kepler field and six K2 campaigns, with each plate containing a number of stars ranging from ~2000 to ~3000. During the first year of observations, the LK-MRS has already visited 13 plates 223 times over 40 individual nights, and collected ~280000 and ~369000 high-quality spectra in the blue and red wavelength ranges, respectively. The atmospheric parameters and radial velocities for ~259000 spectra of 21053 targets were successfully calculated by the LAMOST stellar parameter pipeline. The internal uncertainties for the effective temperature, surface gravity, metallicity, and radial velocity are found to be 100K, 0.15dex, 0.09dex, and 1.00km/s, respectively, when derived from a medium-resolution LAMOST spectrum with a signal-to-noise ratio (S/N) in the g band of 10. All of the uncertainties decrease as S/N increases, but they stabilize for S/N>100. We found 14997, 20091, and 1514 stars in common with the targets from the LAMOST low-resolution survey (LRS), Gaia, and the Apache Point Observatory Galactic Evolution Experiment (APOGEE), respectively, corresponding to fractions of ~70%, ~95%, and ~7.2%. In general, the parameters derived from LK-MRS spectra are consistent with those obtained from the LRS and APOGEE spectra, but the scatter increases as the surface gravity decreases when comparing with the measurements from APOGEE. A large discrepancy is found with the Gaia values of the effective temperature. Comparisons of the radial velocities of LK-MRS to Gaia and LK-MRS to APOGEE nearly follow a Gaussian distribution with means of {mu}~1.10 and 0.73km/s, respectively. We expect that the results from the LK-MRS spectra will shed new light on binary stars, asteroseismology, stellar activity, and other research fields.2020ApJS..251...15Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/251/15CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/133 : Kepler Input Catalog (Kepler Mission Team, 2009)V/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015)IV/34 : K2 Ecliptic Plane Input Catalog (EPIC) (Huber+, 2017)I/345 : Gaia DR2 (Gaia Collaboration, 2018)V/164 : LAMOST DR5 catalogs (Luo+, 2019)III/284 : APOGEE-2 data from DR16 (Johnsson+, 2020)J/A+A/454/301 : Radial velocities of 6 binaries (Frasca+, 2006)J/ApJ/640/1051 : 25pc sample of Sun-like stars (Grether+, 2006)J/AJ/135/785 : SDSS-DR5 low-mass star spectroscopic sample (West+, 2008)J/ApJS/190/1 : A survey of stellar families (Raghavan+, 2010)J/AJ/142/112 : KIC photometric calibration (Brown+, 2011)J/AJ/141/83 : Kepler Mission. I. Eclipsing binaries in DR1 (Prsa+, 2011)J/A+A/525/A71 : Atmospheric parameters for 1273 stars (Wu+, 2011)J/A+A/543/A160 : Normalized spectra of 82 Kepler red giants (Thygesen+, 2012)J/ApJS/204/24 : Kepler planetary candidates. III. (Batalha+, 2013)J/ApJS/211/2 : Revised stellar data of Q1-16 Kepler targets (Huber+, 2014)J/MNRAS/453/1095 : NGC 6866 UBVRI photometry (Bostanci+, 2015)J/ApJS/220/19 : LAMOST obs. in the Kepler field. I. (De Cat+, 2015)J/MNRAS/454/2787 : LAMOST DR2 white dwarfs (Guo+, 2015)J/MNRAS/450/2764 : Spectroscopic survey of Kepler stars. I. (Niemczura+, 2015)J/A+A/594/A39 : LAMOST-Kepler param. & activity indicators (Frasca+, 2016)J/AJ/151/13 : LAMOST-Kepler MKCLASS spectral classification (Gray+, 2016)J/ApJS/224/2 : K2 EPIC stellar properties for 138600 targets (Huber+, 2016)J/AJ/152/187 : Planet occurrence and metallicity for KOIs (Mulders+, 2016)J/ApJS/232/23 : 27 pulsating DA WDs follow-up observations (Hermes+, 2017)J/AJ/154/107 : California-Kepler Survey (CKS). I. (Petigura+, 2017)J/ApJS/233/23 : APOKASC cat. of KIC dwarfs and subgiants (Serenelli+, 2017)J/AJ/156/71 : K2: young disk-bearing stars in Sco & Oph (Cody+, 2018)J/ApJ/861/149 : Kepler Follow-up Obs. Program. II. Spectro. (Furlan+, 2018)J/MNRAS/474/4322 : Orbital parameters of 341 new binaries (Murphy+, 2018)J/ApJS/239/32 : APOKASC-2 cat. of Kepler evolved stars (Pinsonneault+, 2018)J/A+A/631/A125 : 54 massive companions detected with SOPHIE (Kiefer+, 2019)J/ApJS/243/28 : Magnetic activities from LAMOST & Kepler (Lu+, 2019)J/ApJ/875/29 : Spectrosc. analysis of the CKS sample. I. (Martinez+, 2019)J/MNRAS/484/L8 : Correcting HIRES/Keck RVs for syst. errors (Tal-Or+, 2019)J/ApJS/244/27 : Radial velocity measurements in LAMOST-II (Wang+, 2019)J/ApJS/241/29 : Flare catalog through LC data of Kepler DR25 (Yang+, 2019)http://dr7.lamost.org/ : LAMOST DR7 home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/251/15https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/251/15http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/251/15https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/251/15https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/251/15http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/251/15GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/251/15/table3 (Database of atmospheric parameters and radial velocities obtained from the spectra collected in the first year of the LK-MRS survey)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/251/15/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/251/15/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/251/15/table3?GETtext/xml+votable180.050000true12.936579.842841940.0055555555555555564/270 304 1127 5/256-257 260-261 1063 1069 1074 1086 1165 1167 1169-1172 1174 1176-1178 1222 1224-1225 3691 3694 3733-3735 3776-3778 3780 4533 4554 4579 4584-4585 4587-4588 4590 6058-6059 6061-6063 6072 6074 6852 6854-6855 6860-6861 6866 6875 6878 6897 6900 6/341 343 1032-1033 1035-1038 1048 1088-1090 4247 4251 4273 4275 4284-4285 4287 4290-4291 4300 4302 4338-4339 4348 4350 4637-4639 4657 4659 4665 4673 4675 4692 4694-4695 4700-4701 4703 4716-4718 4725 4757 4800-4801 4882 4912 4914 14590-14591 14759 14761-14763 14770-14771 14774 14780-14782 14929-14931 14960-14961 14964 15116-15117 18023 18029 18031 18128-18129 18131 18210 18304-18306 18313-18315 18328 18330-18331 18344-18345 18347 23551 24226-24227 24230 24241-24243 27405 27407 27412 27414-27415 27429 27452-27453 27458 27488-27490 27494 27497 27499 27506-27507 27518 27585 27587 27596-27597 27604 27606 27608-27609https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/251/15?format=asciiOpticaldefaultJ/ApJS/251/15/table3Database of atmospheric parameters and radial velocities obtained from the spectra collected in the first year of the LK-MRS surveySimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameTarget identifier (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharID[5092700/251412092]? Kepler Input Catalog (KIC) or EPIC identifier (1)meta.id.crosslongnullableRAJ2000[12.9/297.7] Right Ascension (J2000)degpos.eq.ra;meta.mainindexedDEJ2000[0.7/47] Declination (J2000)degpos.eq.dec;meta.mainindexedTeff[3128/8481] Weighted average effective temperatureKphys.temperature.effective;stat.meaninte_Teff[0/2514]? Uncertainty in TeffKstat.error;phys.temperature.effectiveintnullablelog(g)[0.01/5] Weighted average log surface gravitylog(cm.s**-2)phys.gravity;stat.meanfloate_log(g)[0/2.3]? Uncertainty in log(g)log(cm.s**-2)stat.errorfloatnullable[Fe/H][-2.5/0.7]? Weighted average metallicityphys.abund.Z;stat.meanfloatnullablee_[Fe/H][0/3]? Uncertainty in [Fe/H]stat.error;phys.abund.FefloatnullableRVel[-9999/347]? Weighted average radial velocitykm/sphys.veloc;pos.heliocentricdoublenullablee_RVel[0/4054]? Uncertainty in RVelkm/sstat.error;spect.dopplerVelocfloatnullableNmrs[1/45] Number of medium-resolution spectra (MRS) spectra analysed (2)meta.numberintLAMOSTDisplay the LAMOST -DR4 (V/153) and -DR5 (V/164) data within 0.7"meta.ref.urlintnullable