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Abundance analysis of Barium stars
Liu, Guo-Qing1,2; Liang, Yan-Chun1; Deng, Li-Cai1
2009-04-01
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
Volume9Issue:4Pages:431-448
AbstractWe 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.
KeywordStars: Abundances Stars: Atmospheres Stars: Chemically Peculiar Stars: Evolution Binaries: Spectroscopic
Indexed BySCI
Language英语
WOS IDWOS:000265485000006
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/8320
Collection光学天文研究部
Affiliation1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
Recommended Citation
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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