为进一步探讨钡星的形成机制,采用了Yutaka Komiya (2007)建立的双星星风吸积模型,计算了4颗钡星的s-元素丰度,并和观测结果作了比较.结果发现,中子辐照量在重元素核合成方面起主导作用,同时检验了Yutaka Komiya模型的合理性.
[1] 刘俊红, 张彩霞, 张波, LIU Jun-hong, ZHANG Cai-xia, ZHANG Bo. 两个星风吸积模型的比较 [J]. 河北科技大学学报 2008.
[2] BUSSO M, GALLINO R, LAMBERT D L. Nucleosynthesis and mixing on the Asymptotic Giant Branch Ⅲ.predicted and observed s-process abundances [J]. Astrophysical Journal 2001, 557.
[3] 韩占文. 钡星的形成机制(Ⅱ)Monte Carlo分析 [J]. 天体物理学报 1998, 18(03).
[4] JORISSEN A, VAN EXK S, MAYOR M. Insights into the formation and Tc-poor Sstars from an extended sampie of orbital elememts [J]. Astronomy and Astrophysics 1998, 332.
[5] LIANG Yancun, ZHAO Gang, ZHANG Bo. The heavy-element abundances of AGB stars and the angular momentum conservation model of wind accretion for barium stara [J]. Astronomy and Astrophysics 2000, 363.
[6] 张波, 刘俊红, 梁艳春. 外赋AGB星星风吸积的角动量守恒模型 [J]. 天文学报 1998, 39(04).
[7] LIU Junhong, ZHANG Bo, LIANG Yanchun. Orbital elements of barium stara formed through a wind accretion scenario [J]. Astronomy and Astrophysics 2000, 363.
[8] YUTAKA KOMIYA, TAKUMA SUDA, HIROKI MINAGUCHI. The origin of carbon-enhancement and initial mass of extremely metal-poor stars in the galactic halo [J]. Astrophysical Journal 2007, 658.
[9] Allen DM, Barbuy B. Analysis of 26 barium stars - II. Contributions of s-, r-, and p-processes in the production of heavy elements [J]. Astronomy and astrophysics 2006, 3(3).
[10] Smiljanic R, de Mello GFP, da Silva L. Abundance analysis of barium and mild barium stars [J]. Astronomy and astrophysics 2007, 2(2).
[11] HAN Zhanwen. The formation of barium and CH stars and related objects [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 1995, 277.
[12] BUSSO M, LAMBERT D L, BEGLIO L. Nucleosynthesis and mixing on the Asymptotic Giant Branch Ⅱ.carbon and barium in the galactic [J]. The Astrophysical Journal 1995, 446.