Abundance analysis of barium stars
Abundance analysis of barium stars
复制标题
钡星的丰度分析
DOI:
10.1017/s1743921313007163
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发表时间:
2008-11
期刊:
影响因子:
--
通讯作者:
Zhang, Bo
中科院分区:
文献类型:
--
作者:
Yang, Guochao;Liang, Yanchun;Cui, Wenyuan;Zhang, Bo
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.
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影响因子:
6.5
作者:
A. Bard;M. Kock
通讯作者:
A. Bard;M. Kock
DOI:
10.1086/313305
发表时间:
2000-02
期刊:
The Astrophysical Journal Supplement Series
影响因子:
--
作者:
G. Zhao;H. Qiu;Y. Chen;Z. W. Li
通讯作者:
G. Zhao;H. Qiu;Y. Chen;Z. W. Li
DOI:
10.1364/josab.8.001185
发表时间:
1991-06
影响因子:
1.9
作者:
T. R. O'Brian;M. Wickliffe;J. Lawler;W. Whaling;J. W. Brault
通讯作者:
T. R. O'Brian;M. Wickliffe;J. Lawler;W. Whaling;J. W. Brault
DOI:
10.1086/146415
发表时间:
1957-09
期刊:
The Astrophysical Journal
影响因子:
--
作者:
A. Omholt
通讯作者:
A. Omholt
影响因子:
6.5
作者:
R. Smiljanic;G. P. D. Mello;L. D. Silva
通讯作者:
R. Smiljanic;G. P. D. Mello;L. D. Silva