Lithium-rich Giants in LAMOST Survey. I. The Catalog
Gao,Qi1,2; Shi,Jian-Rong1,2; Yan,Hong-Liang1,2; Yan,Tai-Sheng1,2; Xiang,Mao-Sheng3; Zhou,Yu-Tao4,5; Li,Chun-Qian1,2; Zhao,Gang1,2
Source PublicationThe Astrophysical Journal Supplement Series
AbstractAbstract Standard stellar evolution model predicts a severe depletion of lithium (Li) abundance during the first dredge up process (FDU). Yet a small fraction of giant stars are still found to preserve a considerable amount of Li in their atmospheres after the FDU. Those giants are usually identified as Li-rich by a widely used criterion, A(Li) > 1.5 dex. A large number of works dedicated to searching for and investigating this minority of the giant family, and the amount of Li-rich giants, has been largely expanded on, especially in the era of big data. In this paper, we present a catalog of Li-rich giants found from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) survey with Li abundances derived from a template-matching method developed for LAMOST low-resolution spectra. The catalog contains 10,535 Li-rich giants with Li abundances from ~1.5 to ~4.9 dex. We also confirm that the ratio of Li-rich phenomenon among giant stars is about 1%—or more specifically, 1.29%—from our statistically important sample. This is the largest Li-rich giant sample ever reported to date, which significantly exceeds amount of all reported Li-rich giants combined. The catalog will help the community to better understand the Li-rich phenomenon in giant stars.
KeywordLate stellar evolution Stellar abundances Late-type giant stars Chemically peculiar stars
WOS IDIOP:0067-0049-245-2-ab505c
PublisherThe American Astronomical Society
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Document Type期刊论文
Affiliation1.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China,
2.University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
3.Max-Planck Institute for Astronomy, Konigstuhl, D-69117, Heidelberg, Germany
4.Department of Astronomy, School of Physics, Peking University, Beijing 100871, People’s Republic of China
5.Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, People’s Republic of China
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
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GB/T 7714
Gao,Qi,Shi,Jian-Rong,Yan,Hong-Liang,et al. Lithium-rich Giants in LAMOST Survey. I. The Catalog[J]. The Astrophysical Journal Supplement Series,2019,245(2).
APA Gao,Qi.,Shi,Jian-Rong.,Yan,Hong-Liang.,Yan,Tai-Sheng.,Xiang,Mao-Sheng.,...&Zhao,Gang.(2019).Lithium-rich Giants in LAMOST Survey. I. The Catalog.The Astrophysical Journal Supplement Series,245(2).
MLA Gao,Qi,et al."Lithium-rich Giants in LAMOST Survey. I. The Catalog".The Astrophysical Journal Supplement Series 245.2(2019).
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