Abundance analyses of three helium-rich sdB stars
Abundance analyses of three helium-rich sdB stars
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三颗富氦 sdB 星的丰度分析
DOI:
10.1007/s10509-010-0334-x
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发表时间:
2010
影响因子:
1.9
通讯作者:
N. N
中科院分区:
文献类型:
--
作者:
N. N
As part of an extended study of the surface abundances of extremely helium-rich hot subdwarfs, high-resolution optical échelle spectra of the three helium-rich subdwarf B stars LB 1766, SB 21 and BPS 22940–0009 are presented. Opacity-sampled line-blanketed model atmospheres have been used to derive atmospheric properties and surface abundances. All three stars are moderately metal-poor compared with the Sun ([Fe/H]≈−0.4). The first two stars are nitrogen-rich He-sdBs, while the third is a carbon-rich He-sdB. The surface composition and locus of single N-rich He-sdBs are currently best explained by the merger of two helium white dwarfs. C-rich He-sdBs require further investigation.
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DOI:
10.1086/116060
发表时间:
1992
期刊:
The Astronomical Journal
影响因子:
--
作者:
T. Beers;S. Doinidis;K. Griffin;G. Preston;S. Shectman
通讯作者:
T. Beers;S. Doinidis;K. Griffin;G. Preston;S. Shectman
DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
A. Ahmad;N. Behara;C. Jeffery;T. Şahin;V. Woolf
通讯作者:
V. Woolf
DOI:
--
发表时间:
1998
期刊:
影响因子:
--
作者:
J. Drilling;C. S. Jeffery;U. Heber
通讯作者:
U. Heber
DOI:
10.1086/498674
发表时间:
2005
期刊:
The Astrophysical Journal
影响因子:
--
作者:
G. Pandey;D. Lambert;C. Jeffery;N. K. R. I. Bangalore;UT Austin;Armagh Observatory
通讯作者:
Armagh Observatory
DOI:
--
发表时间:
2001
期刊:
影响因子:
--
作者:
C. Jeffery;V. Woolf;D. Pollacco
通讯作者:
D. Pollacco