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
复制
发表时间:
2019-12
期刊:
The Astrophysical Journal Supplement Series
影响因子:
--
通讯作者:
Gang Zhao
Gang Zhao
中科院分区:
其他
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

文献摘要

参考文献

被引文献

相似文献

标准的恒星演化模型预测在第一次疏浚过程(FDU)中锂(Li)丰度会发生严重的耗竭。然而,在FDU之后,仍然发现一小部分巨星在其大气中保留了相当数量的Li。这些巨星通常被认为是富锂的广泛使用的标准,A(Li)> 1.5 dex。大量致力于寻找和调查巨人家族中的这一少数人的作品,以及李富豪巨人的数量,在很大程度上得到了扩展,特别是在大数据时代。在本文中,我们提出了一个目录的富锂巨星发现的大天区多目标光纤光谱望远镜(LAMOST)的调查与锂丰度来自LAMOST低分辨率光谱的模板匹配方法。该目录包含10,535颗富锂巨星,锂丰度从1.5 dex到1.9 dex。我们还证实,从我们统计上重要的样本中,巨星中富锂现象的比例约为1%,更具体地说,为1.29%。这是迄今为止报道的最大的富锂巨星样本,大大超过了所有报道的富锂巨星的总和。该目录将帮助社区更好地了解巨星中的富锂现象。
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.
贫金属恒星中的锂丰度
DOI: 10.1051/0004-6361:20066709
发表时间: 2007-04
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
DOI: 10.1086/191375
发表时间: 1984-03
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