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Abundance analysis of Barium stars
Liu, Guo-Qing1,2; Liang, Yan-Chun1; Deng, Li-Cai1
2009-04-01
发表期刊RESEARCH IN ASTRONOMY AND ASTROPHYSICS
卷号9期号:4页码:431-448
摘要We obtain the chemical abundances of six barium stars and two CH subgiant stars based on the high signal-to-noise ratio and high resolution Echelle spectra. The neutron capture process elements Y, Zr, Ba, La and Eu show obvious overabundances relative to the Sun, for example, their [Ba/Fe] values are from 0.45 to 1.27. Other elements, including Na, Mg, Al, Si, Ca, Sc, Ti, V, Cr, Mn and Ni, show comparable abundances to the Solar ones, and their [Fe/H] covers a range from -0.40 to 0.21, which means they belong to the Galactic disk. The predictions of the theoretical model of wind accretion for binary systems can explain the observed abundance patterns of the neutron capture process elements in these stars, which means that their overabundant heavy-elements could be caused by accreting the ejecta of AGB stars, the progenitors of present-day white dwarf companions in binary systems.
关键词Stars: Abundances Stars: Atmospheres Stars: Chemically Peculiar Stars: Evolution Binaries: Spectroscopic
收录类别SCI
语种英语
WOS记录号WOS:000265485000006
引用统计
文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/8320
专题光学天文研究部
作者单位1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
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GB/T 7714
Liu, Guo-Qing,Liang, Yan-Chun,Deng, Li-Cai. Abundance analysis of Barium stars[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2009,9(4):431-448.
APA Liu, Guo-Qing,Liang, Yan-Chun,&Deng, Li-Cai.(2009).Abundance analysis of Barium stars.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,9(4),431-448.
MLA Liu, Guo-Qing,et al."Abundance analysis of Barium stars".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 9.4(2009):431-448.
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