Lithium-rich Giants in LAMOST Survey. I. The Catalog
Lithium-rich Giants in LAMOST Survey. I. The Catalog
复制标题
LAMOST 调查中的富锂巨星。
DOI:
10.3847/1538-4365/ab505c
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发表时间:
2019-12
期刊:
影响因子:
--
通讯作者:
Gang Zhao
中科院分区:
文献类型:
--
作者:
Qi Gao;Jian-Rong Shi;Hong-Liang Yan;Tai-Sheng Yan;Mao-Sheng Xiang;Yu-Tao Zhou;Chun-Qian Li;Gang Zhao
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.
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影响因子:
6.5
作者:
H.W. Zhang;T. Gehren;J.R. Shi;J.L. Zeng;G. Zhao
通讯作者:
G. Zhao
影响因子:
8.7
作者:
Jeffery A. Brown;C. Sneden;D. Lambert;Edward Dutchover
通讯作者:
Jeffery A. Brown;C. Sneden;D. Lambert;Edward Dutchover
DOI:
10.1088/2041-8205/767/1/l19
发表时间:
2013-03
期刊:
The Astrophysical Journal Letters
影响因子:
--
作者:
B. Anthony-Twarog;C. Deliyannis;Evan A. Rich;B. Twarog
通讯作者:
B. Anthony-Twarog;C. Deliyannis;Evan A. Rich;B. Twarog
DOI:
10.1086/149040
发表时间:
1967-02
期刊:
The Astrophysical Journal
影响因子:
--
作者:
I. Iben
通讯作者:
I. Iben
DOI:
10.1086/430190
发表时间:
2005-03
期刊:
The Astronomical Journal
影响因子:
--
作者:
B. E. Reddy;D. Lambert
通讯作者:
B. E. Reddy;D. Lambert