YNAO OpenIR  > 恒星物理研究组
Lithium Evolution of Giant Stars Observed by LAMOST and Kepler
Zhang, Jinghua1; Shi, Jian-Rong1,2; Yan, Hong-Liang1,2; Li, Yaguang3,4; Gao, Qi1,2; Li, Chun-Qian1,2; Zhang, Xianfei5; Liu, Shuai1,2; Bi, Shaolan5; Zhao, Gang1,2; Li Y(李焱)2,6,7,8
发表期刊ASTROPHYSICAL JOURNAL LETTERS
2021-09
卷号919期号:1
DOI10.3847/2041-8213/ac224c
产权排序第6完成单位
收录类别SCI
摘要

Mapping lithium evolution for evolved stars will provide restrictions and constraints on the fundamental stellar interior physical processes, which will shed further light on our understanding of the theory of stellar structure and evolution. Based on a sample of 1848 giants with known evolutionary phases and lithium abundances from the LAMOST-Kepler and LAMOST-K2 fields, we construct mass-radius diagrams to characterize the evolutionary features of lithium. The stars at red giant branch (RGB) phase show natural depletion along with their stellar evolution; particularly, there are no obvious crowd stars with anomalously high Li abundances near the bump. Most of the low-mass stars reaching their zero-age sequence of core helium burning (ZAHeB) have Li abundances around similar to 1.0 dex, which shows an increase of Li abundance by similar to 0.6 dex compared to the stars above the RGB bump. This suggests that helium flash may be responsible for moderate Li production, while for super Li-rich stars, some special mechanisms should be considered during helium flash. Other scenarios, such as mergers, could also be sources given that Li-rich stars can be found at any time during the steady-state phase of core He burning. During the core He-burning (HeB) phase, there is no indication of obvious lithium depletion.

资助项目National Key R&D Program of China[2019YFA0405502] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[12090040] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[12090044] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[12022304] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[U2031203] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[11833006] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[11973052] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[11973042] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[11988101] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[11890694] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[U1931102] ; Youth Innovation Promotion Association of the CAS[2019060] ; NAOC Nebula Talents Program ; NASA's Science Mission Directorate ; National Development and Reform Commission
项目资助者National Key R&D Program of China[2019YFA0405502] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[12090040, 12090044, 12022304, U2031203, 11833006, 11973052, 11973042, 11988101, 11890694, U1931102] ; Youth Innovation Promotion Association of the CAS[2019060] ; NAOC Nebula Talents Program ; NASA's Science Mission Directorate ; National Development and Reform Commission
语种英语
学科领域天文学 ; 恒星与银河系 ; 恒星形成与演化
学科门类理学 ; 理学::天文学
文章类型Article
出版者IOP PUBLISHING LTD
出版地TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN2041-8205
URL查看原文
WOS记录号WOS:000700888900001
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]RED ; ABUNDANCE
引用统计
被引频次:9[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
版本出版稿
条目标识符http://ir.ynao.ac.cn/handle/114a53/24576
专题恒星物理研究组
中国科学院天体结构与演化重点实验室
通讯作者Shi, Jian-Rong
作者单位1.CAS Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People's Republic of China sjr@nao.cas.cn, hlyan@nao.cas.cn;
2.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100101, People's Republic of China;
3.Sydney Institute for Astronomy (SIfA), School of Physics, University of Sydney, NSW 2006, Australia;
4.Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark;
5.Department of Astronomy, Beijing Normal University, Beijing 100875, People's Republic of China;
6.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, People's Republic of China;
7.Key Laboratory for Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, People's Republic of China;
8.Center for Astronomical Mega-Science, Chinese Academy of Sciences, Beijing, 100012, People's Republic of China
推荐引用方式
GB/T 7714
Zhang, Jinghua,Shi, Jian-Rong,Yan, Hong-Liang,et al. Lithium Evolution of Giant Stars Observed by LAMOST and Kepler[J]. ASTROPHYSICAL JOURNAL LETTERS,2021,919(1).
APA Zhang, Jinghua.,Shi, Jian-Rong.,Yan, Hong-Liang.,Li, Yaguang.,Gao, Qi.,...&Li Y.(2021).Lithium Evolution of Giant Stars Observed by LAMOST and Kepler.ASTROPHYSICAL JOURNAL LETTERS,919(1).
MLA Zhang, Jinghua,et al."Lithium Evolution of Giant Stars Observed by LAMOST and Kepler".ASTROPHYSICAL JOURNAL LETTERS 919.1(2021).
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