Modeling epsilon Eri and Asteroseismic Tests of Element Diffusion

doi:10.1088/1009-9271/8/5/10

YNAO OpenIR > 恒星物理研究组

	Modeling epsilon Eri and Asteroseismic Tests of Element Diffusion
	Gai N(盖宁)1,3 ; Bi SL(毕少兰)1,2 ; Tang YK(唐延柯)1,3 ; Gai, N (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China.
发表期刊	CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
	2008-10
卷号	8 期号:5 页码:591-602
DOI	10.1088/1009-9271/8/5/10
产权排序	第1完成单位
收录类别	SCI
关键词	Stars: Evolution Stars: Interiors Stars: Individual: Epsilon Eridani
摘要	Taking into account the helium and metal diffusion, we explore the possible evolutionary status with a seismic analysis, of the MOST (Microvariability and Oscillations of STars) target: the star epsilon Eri. We adopt different input parameters to construct models to fit the available observational constraints in, e.g., T-eff, L, R and [Fe/H]. From the computation we obtain the average large spacings of epsilon Eri to be about 194 +/- 1 mu Hz. The age of the diffused models was found to be about 1 Gyr, which is younger than the age determined previously by models without diffusion. We found that the effect of pure helium diffusion on the internal structure of the young low-mass star is slight, but that of metal diffusion is obvious. The metal diffusion leads the models to have much higher temperature in the radiative interior, and, correspondingly a higher sound speed there, hence a larger frequency and spacings.
项目资助者	National Natural Science Foundation of China ; Ministry of Science and Technology of China(2007CB815406) ; NSFC(10173021, 10433030, 10773003, 10778601)
语种	英语
学科领域	Astronomy & Astrophysics
文章类型	Article
ISSN	1009-9271
URL	查看原文
WOS记录号	WOS:000260455200010
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	VEGA-LIKE STARS ; HELIUM DIFFUSION ; SOLAR MODELS ; STELLAR PARAMETERS ; INTERIOR STRUCTURE ; SEISMIC ANALYSIS ; HOST STARS ; OSCILLATIONS ; ERIDANI ; AGE
引用统计	被引频次：5[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ynao.ac.cn/handle/114a53/5193
专题	恒星物理研究组
通讯作者	Gai, N (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China.
作者单位	1.National Astronomical Observatories / Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China 2.Department of Astronomy, Beijing Normal University, Beijing 100875, China 3.Graduate School of Chinese Academy of Sciences, Beijing 100049, China
第一作者单位	中国科学院云南天文台
推荐引用方式 GB/T 7714	Gai N,Bi SL,Tang YK,et al. Modeling epsilon Eri and Asteroseismic Tests of Element Diffusion[J]. CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2008,8(5):591-602.
APA	Gai N,Bi SL,Tang YK,&Gai, N .(2008).Modeling epsilon Eri and Asteroseismic Tests of Element Diffusion.CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,8(5),591-602.
MLA	Gai N,et al."Modeling epsilon Eri and Asteroseismic Tests of Element Diffusion".CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS 8.5(2008):591-602.

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