Lithium Evolution of Giant Stars Observed by LAMOST and Kepler
文献类型:期刊论文
作者 | 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 |
刊名 | ASTROPHYSICAL JOURNAL LETTERS |
出版日期 | 2021-09 |
卷号 | 919期号:1 |
ISSN号 | 2041-8205 |
DOI | 10.3847/2041-8213/ac224c |
产权排序 | 第6完成单位 |
文献子类 | Article |
英文摘要 | 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. |
学科主题 | 天文学 ; 恒星与银河系 ; 恒星形成与演化 |
URL标识 | 查看原文 |
出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
WOS关键词 | RED ; ABUNDANCE |
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 |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | IOP PUBLISHING LTD |
WOS记录号 | WOS:000700888900001 |
资助机构 | 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 |
版本 | 出版稿 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/24576] |
专题 | 云南天文台_恒星物理研究组 云南天文台_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). |
入库方式: OAI收割
来源:云南天文台
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