Lithium abundances from LAMOST MRS. I. J/ApJ/914/116 ivo://CDS.VizieR/J/ApJ/914/116 doi:10.26093/cds/vizier.19140116 CDS Gao Q. Shi J.-R. Yan H.-L. Li C.-Q. Chen T.-Y. Zhang J.-H. Liu S.,Yan T.-S. Xie X.-J. Ding M.-Y. Zhang Y. Hou Y.-H. 2023-01-24T12:45:38Z 2023-01-09T09:24:06Z CDS support team CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France cds-question@unistra.fr chemical-abundances visible-astronomy spectroscopy One of the purposes of taking spectra for millions of stars through the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) medium-resolution survey (MRS) is to obtain the elemental abundances, so that one can trace the origin and evolution for the element of interests. Lithium is one of such elements of great importance, which exhibits many puzzling behaviors. Investigating the lithium abundances to a uniquely large sample of stars is essential to understand its origin and evolution. In this paper, we present the lithium abundances obtained from the LAMOST MRS spectra calculated by the template-matching method. Our data set consists of 294857 spectra that corresponds to 165479 stars with a resolution power of {Delta}{lambda}/{lambda}~7500. We compared the lithium abundances derived from our work with those using the high-resolution spectra and found a good consistence. The errors of lithium abundances are discussed. Our results suggest that the distribution of lithium abundances show two clear peaks at +2.6 and +1.0dex, respectively. This sample is potentially important for investigating physical mechanisms occurring inside stars that alter the surface lithium abundance. 2021ApJ...914..116G https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/914/116 Catalog Research IsServedBy TAP VizieR generic service IsServedBy Conesearch service related-to III/218 : ELODIE archive (Prugniel+, 2001) V/153 : LAMOST DR4 catalogs (Luo+, 2018) V/156 : LAMOST DR7 catalogs (Luo+, 2019) III/284 : APOGEE-2 data from DR16 (Johnsson+, 2020) J/A+A/503/545 : EWs of Li, Na, Fe, Ca in NGC 6397 (Lind+, 2009) J/A+A/522/A26 : Fe Abundances in metal-poor stars (Sbordone+ 2010) J/ApJ/756/46 : Lithium abundances in HIP stars (Ramirez+, 2012) J/A+A/576/A69 : Li abundances in F stars (Delgado Mena+, 2015) J/AJ/151/144 : ASPCAP weights for APOGEE chemical elements (Garcia+, 2016) J/A+A/595/A18 : Lithium abundances in AMBRE stars (Guiglion+, 2016) J/AJ/153/128 : WOCS. LXXV. Hyades&Praesepe Lithium data (Cummings+, 2017) J/A+A/610/A38 : Li enrichment histories of the thick/thin disc (Fu+, 2018) J/AJ/155/138 : WOCS.LXXVI.Vel. & abund. in NGC2506 (Anthony-Twarog+, 2018) J/A+A/615/A151 : Lithium abundances in 714 F & G dwarf stars (Bensby+, 2018) J/MNRAS/478/4513 : GALAH Survey DR2 (Buder+, 2018) J/MNRAS/484/4591 : The GALAH Survey lithium-strong KM dwarfs (Zerjal+, 2019) J/AJ/158/163 : Li abundance values for stars in NGC6819 (Deliyannis+, 2019) J/A+A/634/A130 : Lithium abund. in microlensed bulge dwarfs (Bensby+, 2020) J/AJ/159/90 : Li, C and O abundances of FGK stars (Stonkute+, 2020) J/MNRAS/506/150 : The GALAH+ Survey DR3 (Buder+, 2021) https://cds.unistra.fr/vizier-org/licences_vizier.html https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/914/116 https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/914/116 http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/914/116 https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/914/116 https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/914/116 http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/914/116 GET text/xml+votable https://tapvizier.cds.unistra.fr/TAPVizieR/tap Cone search capability for table J/ApJ/914/116/table2 (The information and resulting lithium abundances of our sample) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/914/116/table2? https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/914/116/table2? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/914/116/table2? 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27196 27241-27243 27252 27254-27255 27285 27287 27293 27352-27354 27356 27364-27365 27405 27407 27409-27412 27414-27415 27426 27429 27432 27434 27449 27451 27458 27462-27463 27474 27486 27508 27510 27516 27518 27520 27522 27540-27541 27581-27583 27596-27597 27604 27606 27608-27609 27623 27634-27635 27638 27649 27651 27666 27696-27698 27775 27784-27785 27788 27893 27946-27947 27970-27971 27974-27975 27981 28021-28023 28025 28027 28064-28065 28068-28069 28083 28086-28087 28115 28133-28136 28138-28139 28383 28421 28423 28440-28441 28443 28462 28513 28517 28537 28540 28543 28545-28547 28560 28562 28568 28570 28580-28582 28592 28597-28599 28605 28607 28629-28631 28634 28652-28654 28656 28658 28660-28661 30029 30034-30035 30044 30046 30064-30065 30215 30246 30845 30847 30933 31016 31018-31019 31032 31034 31101 31103 31120 31363 31370 31398-31399 31403 31410 31420 31422 31681-31683 31698 31712-31713 31715 31725 31728-31730 31736 31794 31800 31802-31803 31888 31890 31927 31970-31971 31974 32183 32185 32187 32232 32234-32235 32250 32276-32277 32279 32285 32328-32329 32332 32373 32375 32380-32381 32383 32413 32415 32437 32439 32451 32454-32455 32469 32488-32489 32492-32493 32521-32523 32529 32538 32560 32562 32568 32581 32583-32584 32587 32589-32591 32600 32609 32612-32613 32644-32646 32650-32651 32671 32680 32682 32691 32714-32715 32742 32748-32750 45019 49143 49149 49151 https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/914/116?format=ascii Optical default J/ApJ/914/116/table2 The information and resulting lithium abundances of our sample recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int LAMOST LAMOST MRS identifier (JHHMMSS.ss+DDMMSS.s) meta.id;meta.main char m_LAMOST Number of Lithium abundance measurement(s) for this star meta.number int nullable obsID [588902003/747816250] LAMOST obsID meta.id;obs long GaiaDR2 Gaia DR2 identifier meta.id.cross RAJ2000 Right ascension (J2000) deg pos.eq.ra;meta.main indexed DEJ2000 [-9.99/76.3] Declination (J2000) deg pos.eq.dec;meta.main indexed Teff [3515/7000] Effective temperature K phys.temperature.effective int logg [0.07/4.97] Log of surface gravity log(cm.s**-2) phys.gravity float [Fe/H] [-2.45/0.5] [Fe/H] abundance Sun phys.abund.Fe float S/N [10/999] Signal-to-noise ratio of the spectrum stat.snr int A(Li) [-1.47/5.48] Lithium abundance phys.abund float e_A(Li) [0.05/0.41] A(Li) uncertainty stat.error float Ref Reference for stellar parameters Teff, logg and [Fe/H] (1) meta.ref;pos.frame char APOGEE Display data from APOGEE-2 DR16 (III/284) within 2" if Ref=A meta.ref.url char