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Chemical abundances in symbiotic stars
Lü, Guoliang1; Zhu, Chunhua1,2; Han ZW(韩占文)3; Wang, Zhaojun1,2; Lü, Guoliang (reprint author), Xinjiang Univ, Dept Phys, Urumqi 830046, Peoples R China.
发表期刊ASTROPHYSICAL JOURNAL
2008-08-20
卷号683期号:2页码:990-1005
DOI10.1086/589876
产权排序第3完成单位
收录类别SCI
关键词Binaries : Symbiotic Galaxy : Stellar Content Stars : Abundances Stars : Evolution White Dwarfs
摘要We have carried out a study of the chemical abundances of H-1, He-4, C-12, C-13, N-14, (15) N, O-16, O-17, Ne-20, and Ne-22 in symbiotic stars (SSs) by means of a population synthesis code. We find that the ratios of the number of O-rich SSs to that of C-rich SSs in our simulations are between 3.4 and 24.1, depending on the third dredge-up efficiency lambda and the terminal velocity of the stellar wind v( 1). The fraction of SSs with extrinsic C-rich cool giants in C-rich cool giants ranges from 2.1% to 22.7%, depending on lambda, the common envelope algorithm, and the mass-loss rate. Compared with the observations, the distributions of the relative abundances of C-12/C-13 vs. [C/H] of the cool giants in SSs suggest that thermohaline mixing in low-mass stars may exist. The distributions of the relative abundances of C/N vs. O/N, Ne/O vs. N/O, and He/H vs. N/O in the symbiotic nebulae indicate that it is quite common for the nebular chemical abundances in SSs to be modified by the ejected materials from the hot components. Helium overabundance in some symbiotic nebulae may be relevant to a helium layer on the surfaces of white dwarf accretors.
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-637X
URL查看原文
WOS记录号WOS:000258528100031
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]ASYMPTOTIC GIANT BRANCH ; INTERMEDIATE-MASS STARS ; SYNTHETIC AGB EVOLUTION ; WHITE-DWARF ACCRETORS ; STELLAR EVOLUTION ; SPECTROSCOPIC BINARIES ; POPULATION SYNTHESIS ; PERIOD DISTRIBUTION ; RATIO DISTRIBUTION ; PLANETARY-NEBULAE
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9367
专题大样本恒星演化研究组
通讯作者Lü, Guoliang (reprint author), Xinjiang Univ, Dept Phys, Urumqi 830046, Peoples R China.
作者单位1.Department of Physics, Xinjiang University, Urumqi, 830046, China
2.School of Science, Xi'an Jiaotong University, Xi'an, 710049, China
3.National Astronomical Observatories Yunnan Observatory, the Chinese Academy of Sciences, P.O. Box 110, Kunming, 650011, China
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Lü, Guoliang,Zhu, Chunhua,Han ZW,et al. Chemical abundances in symbiotic stars[J]. ASTROPHYSICAL JOURNAL,2008,683(2):990-1005.
APA Lü, Guoliang,Zhu, Chunhua,韩占文,Wang, Zhaojun,&Lü, Guoliang .(2008).Chemical abundances in symbiotic stars.ASTROPHYSICAL JOURNAL,683(2),990-1005.
MLA Lü, Guoliang,et al."Chemical abundances in symbiotic stars".ASTROPHYSICAL JOURNAL 683.2(2008):990-1005.
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