The nature of the lithium enrichment in the most Li-rich giant star

doi:10.1038/s41550-018-0544-7

CORC > 国家天文台 > 中国科学院国家天文台

	The nature of the lithium enrichment in the most Li-rich giant star
	Yan, Hong-Liang 1,2; Shi, Jian-Rong 1,2; Zhou, Yu-Tao 1,2; Chen, Yong-Shou 3; Li, Er-Tao 4; Zhang, Suyalatu 5; Bi, Shao-Lan 6; Wu, Ya-Qian 6; Li, Zhi-Hong 3; Guo, Bing 3
刊名	NATURE ASTRONOMY
	2018-10-01
卷号	2 期号:10 页码:790-795
ISSN号	2397-3366
DOI	10.1038/s41550-018-0544-7
英文摘要	About 1% of giant stars(1) have anomalously high Li abundances (A(Li)) in their atmospheres, conflicting directly with the prediction of standard stellar evolution models(2). This finding makes the production and evolution of Li in the Universe intriguing, not only in the sense of Big Bang nucleosynthesis(3,4) or the interstellar mediums(5) but also for the evolution of stars. Decades of effort have been put into explaining why such extreme objects exists(6-8), yet the origins of Li-rich giants are still being debated. Here, we report the discovery of the most Li-rich giant known to date, with a very high A(Li) of 4.51. This rare phenomenon was observed coincidentally with another short-term event: the star is experiencing its luminosity bump on the red giant branch. Such a high A(Li) indicates that the star might be at the very beginning of its Li-rich phase, which provides a great opportunity to investigate the origin and evolution of Li in the Galaxy. A detailed nuclear simulation is presented with up-to-date reaction rates to recreate the Li enrichment process in this star. Our results provide tight constraints on both observational and theoretical points of view, suggesting that low-mass giants can internally produce Li to a very high level through Be-7 transportation during the red giant phase.
资助项目	National Key Basic Research Program of China[2014CB845700] ; National Key Research and Development Project of China[2016YFA0400502] ; National Natural Science Foundation of China[11390371] ; National Natural Science Foundation of China[11603037] ; National Natural Science Foundation of China[11473033] ; National Natural Science Foundation of China[11490560] ; National Natural Science Foundation of China[11505117] ; National Natural Science Foundation of China[11573032] ; National Natural Science Foundation of China[11605097] ; National Development and Reform Commission ; Astronomical Big Data Joint Research Center
WOS关键词	MASS RED GIANTS ; K-GIANT ; REACTION-RATES ; NON-LTE ; ABUNDANCES ; BRANCH ; ATMOSPHERES ; PARAMETERS
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	NATURE PUBLISHING GROUP
WOS记录号	WOS:000446135800015
资助机构	National Key Basic Research Program of China ; National Key Basic Research Program of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Development and Reform Commission ; National Development and Reform Commission ; Astronomical Big Data Joint Research Center ; Astronomical Big Data Joint Research Center ; National Key Basic Research Program of China ; National Key Basic Research Program of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Development and Reform Commission ; National Development and Reform Commission ; Astronomical Big Data Joint Research Center ; Astronomical Big Data Joint Research Center ; National Key Basic Research Program of China ; National Key Basic Research Program of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Development and Reform Commission ; National Development and Reform Commission ; Astronomical Big Data Joint Research Center ; Astronomical Big Data Joint Research Center ; National Key Basic Research Program of China ; National Key Basic Research Program of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Development and Reform Commission ; National Development and Reform Commission ; Astronomical Big Data Joint Research Center ; Astronomical Big Data Joint Research Center
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/22881]
专题	中国科学院国家天文台
通讯作者	Shi, Jian-Rong
作者单位	1.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing, Peoples R China 3.China Inst Atom Energy, Beijing, Peoples R China 4.Shenzhen Univ, Coll Phys & Energy, Shenzhen, Peoples R China 5.Inner Mongolia Univ Nationalities, Coll Phys & Elect Informat, Tongliao, Peoples R China 6.Beijing Normal Univ, Dept Astron, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Yan, Hong-Liang,Shi, Jian-Rong,Zhou, Yu-Tao,et al. The nature of the lithium enrichment in the most Li-rich giant star[J]. NATURE ASTRONOMY,2018,2(10):790-795.
APA	Yan, Hong-Liang.,Shi, Jian-Rong.,Zhou, Yu-Tao.,Chen, Yong-Shou.,Li, Er-Tao.,...&Zhao, Gang.(2018).The nature of the lithium enrichment in the most Li-rich giant star.NATURE ASTRONOMY,2(10),790-795.
MLA	Yan, Hong-Liang,et al."The nature of the lithium enrichment in the most Li-rich giant star".NATURE ASTRONOMY 2.10(2018):790-795.