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题名: Lithium depletion in late-type dwarfs
作者: Xiong, D. R.1; Deng, L.2
刊名: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期: 2009-06-01
卷号: 395, 期号:4, 页码:2013-2028
关键词: convection ; stars: abundances ; stars: evolution ; stars: late-type ; open clusters and associations: general
DOI: 10.1111/j.1365-2966.2009.14581.x
文章类型: Article
英文摘要: Using a self-consistent dynamic theory of non-local convection, the atmospheric lithium-abundance depletion values of a series of stellar evolutionary models with M = 0.725-1.5 M(circle dot) are calculated, and the results show that the general observed properties of lithium abundance in lower-main-sequence stars can be reproduced by overshooting mixing and gravitational settling. After a careful study of the mechanisms of lithium depletion in stars, it is concluded that overshooting mixing and microdiffusion induced by gravitational settling and radiative acceleration are the two primary depletion mechanisms: for warm stars with M = 1.1 M(circle dot) (or T(e) = 6100 K) microdiffusion dominates, while it is the other way round for cooler objects with M <= 1 M(circle dot) (or T(e) <= 5800 K).
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: SOLAR-TYPE STARS ; ALPHA-PERSEI CLUSTER ; MAIN-SEQUENCE STARS ; OLD OPEN CLUSTERS ; HYADES-F-STARS ; NONLOCAL CONVECTION ; STELLAR EVOLUTION ; RADIATIVE ACCELERATIONS ; LI ABUNDANCE ; MODELS
收录类别: SCI
语种: 英语
WOS记录号: WOS:000266112600019
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/15935
Appears in Collections:熊大闰_期刊论文

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作者单位: 1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
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