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| 强钡星和弱钡星的比较 | |
| 引用本文： | 刘俊红,鹿雯,张彩霞,崔文元.强钡星和弱钡星的比较[J].河北师范大学学报(自然科学版),2008,32(1):49-53. |
| 作者姓名： | 刘俊红 鹿雯 张彩霞 崔文元 |
| 作者单位： | 1. 石家庄学院,物理系,河北,石家庄,050035 2. 成都市第七中学,四川,成都,610000 3. 河北师范大学,物理科学与信息工程学院,河北,石家庄,050016 |
| 摘 要： | 利用星风吸积模型,计算了钡星的初始质量和AGB伴星的金属丰度对弱钡星和强钡星超丰因子的影响,计算了弱钡星和强钡星重元素(Y,Nd)丰度随轨道周期终值的变化,并和观测值作了比较.由此得出结论:强钡星和弱钡星的区别主要是金属丰度不同(即年代不同),而不是轨道距离;弱钡星和强钡星相比,属于较年轻、质量较大、金属丰度较丰富的星族;这就意味,s-元素的核合成在低金属丰度星族更有效产生. |
| 关 键 词： | 钡星 超丰因子 金属丰度 |
| 文章编号： | 1000-5854（2008）01-0049-05 |
| 收稿时间： | 2007-03-29 |
| 修稿时间： | 2007年3月29日 |
Compare Strong Barium Stars with Mild Barium Stars |
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| LIU Jun-hong,LU Wen,ZHANG Cai-xia,CUI Wen-yuan.Compare Strong Barium Stars with Mild Barium Stars[J].Journal of Hebei Normal University,2008,32(1):49-53. | |
| Authors: | LIU Jun-hong LU Wen ZHANG Cai-xia CUI Wen-yuan |
| Abstract: | For discussion origin of chemical peculiar different of mild and strong barium stars with accretion scenario, computed that overabundance factor and s/Fe] of mild and strong barium stars changed with metallicity and initiai mass. These results suggest that the difference between mild and strong barium stars is mainly one of galactic population rather than of orbitai separation,and indicate that mild barium stars belong to a younger, more metal-rich and more massive population than strong barium stars, which implies heavy element synthesis is more efficient in alow-metallicity population. |
| Keywords: | barium stars overabundance factor metallicity |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |