YNAO OpenIR  > 恒星物理研究组
Distribution and Evolution of the Li Abundance in Red Clump Stars Can Be Explained by Internal Gravity Waves
Li XF(李雪峰)1,2; Shi, Jian-Rong3,4; Li Y(李焱)1,2,5,6; Yan, Hong-Liang3,4,7; Zhang, Jing-Hua3
发表期刊ASTROPHYSICAL JOURNAL
2023-02-01
卷号943期号:2
DOI10.3847/1538-4357/acae9d
产权排序第1完成单位
收录类别SCI
摘要

The study of Li phenomena in red clump (RC) stars can give us a deeper understanding of the structure and evolution of stars. Chaname et al. explained the RC Li abundance distributions naturally using only standard post-main-sequence (MS) Li evolution models when the distribution of progenitor masses and the depletion of Li during the MS observed in MS stars were considered, thus neither an extra Li depletion nor Li creation mechanism is required. Nevertheless, it is interesting to consider the effects of mixing caused by some extra mechanisms. By constructing different models, we find that the mixing caused by internal gravity waves can explain the observed Li abundances of RC stars with low-mass progenitors. To explain this, we rely on the extra mixing induced by internal gravity waves that are excited at the bottom of the convective envelope during the red giant branch (RGB) stage. During the RGB stage, introducing internal gravity waves can improve the diffusion coefficient and strengthen the mixing effect. The effective enrichment of Li occurs during the late RGB stage and requires the diffusion coefficient of the H-burning shell to reach similar to 10(8) cm(2) s(-1). Our models predict that the Li abundance decreases from similar to 1.5 to similar to 0.0 dex at the end of the core He-burning stage, thereby revealing similar to 99% of the observed Li abundance distribution. Thermohaline mixing regulates the Li abundance of RGB stars, which combined with internal gravity waves can explain the Li abundances of most giants.

资助项目National Natural Science Foundation of China[11833006] ; National Natural Science Foundation of China[11973052] ; National Natural Science Foundation of China[11973079] ; National Natural Science Foundation of China[12022304] ; National Natural Science Foundation of China[12090040] ; National Natural Science Foundation of China[12090044] ; National Natural Science Foundation of China[12273104] ; National Key R&D Program of China[2019YFA0405502] ; Natural Science Foundation of Yunnan Province[202201AT070158] ; Youth Innovation Promotion Association of the CAS[2019060] ; NAOC Nebula Talents Program ; NSFC[12103063] ; China Postdoctoral Science Foundation[2020M680672]
项目资助者National Natural Science Foundation of China[11833006, 11973052, 11973079, 12022304, 12090040, 12090044, 12273104] ; National Key R&D Program of China[2019YFA0405502] ; Natural Science Foundation of Yunnan Province[202201AT070158] ; Youth Innovation Promotion Association of the CAS[2019060] ; NAOC Nebula Talents Program ; NSFC[12103063] ; China Postdoctoral Science Foundation[2020M680672]
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
ISSN0004-637X
URL查看原文
WOS记录号WOS:000923029900001
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]GALAH SURVEY ; LITHIUM ABUNDANCES ; OPEN CLUSTER ; RICH ; ENHANCEMENT ; DEPLETION ; AGE
引用统计
文献类型期刊论文
版本出版稿
条目标识符http://ir.ynao.ac.cn/handle/114a53/25828
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Li XF(李雪峰)
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, P.O. Box 110, Kunming 650216, People's Republic of China; lixuefeng@ynao.ac.cn;
2.University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China;
3.CAS Key Laboratory of Optical Astronomy, National Astronomical Observatories, Beijing 100101, People's Republic of China;
4.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China;
5.Key Laboratory for Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P.O. Box 110, Kunming 650216, People's Republic of China;
6.Center for Astronomical Mega-Science, Chinese Academy of Sciences, Beijing 100012, People's Republic of China;
7.Institute for Frontiers in Astronomy and Astrophysics, Beijing Normal University, Beijing 102206, People's Republic of China
第一作者单位中国科学院云南天文台
通讯作者单位中国科学院云南天文台
推荐引用方式
GB/T 7714
Li XF,Shi, Jian-Rong,Li Y,et al. Distribution and Evolution of the Li Abundance in Red Clump Stars Can Be Explained by Internal Gravity Waves[J]. ASTROPHYSICAL JOURNAL,2023,943(2).
APA Li XF,Shi, Jian-Rong,Li Y,Yan, Hong-Liang,&Zhang, Jing-Hua.(2023).Distribution and Evolution of the Li Abundance in Red Clump Stars Can Be Explained by Internal Gravity Waves.ASTROPHYSICAL JOURNAL,943(2).
MLA Li XF,et al."Distribution and Evolution of the Li Abundance in Red Clump Stars Can Be Explained by Internal Gravity Waves".ASTROPHYSICAL JOURNAL 943.2(2023).
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
Distribution and Evo(3473KB)期刊论文出版稿开放获取CC BY-NC-SA浏览 请求全文
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Li XF(李雪峰)]的文章
[Shi, Jian-Rong]的文章
[Li Y(李焱)]的文章
百度学术
百度学术中相似的文章
[Li XF(李雪峰)]的文章
[Shi, Jian-Rong]的文章
[Li Y(李焱)]的文章
必应学术
必应学术中相似的文章
[Li XF(李雪峰)]的文章
[Shi, Jian-Rong]的文章
[Li Y(李焱)]的文章
相关权益政策
暂无数据
收藏/分享
文件名: Distribution and Evolution of the Li Abundance in Red Clump Stars Can Be Explained by Internal Gravity Waves.pdf
格式: Adobe PDF
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。