强钡星和弱钡星s-元素丰度的分析  

Comparison of S-elements Abundance in Strong Bariun Stars and Mild Bariun Stars

作　　者：刘俊红[1] 刘澎洲 潘丽娟 

机构地区：[1]石家庄学院物理系,河北石家庄050035 [2]河北晋州第五中学,河北晋州052260 [3]石家庄第57中学,河北石家庄050055

出　　处：《石家庄学院学报》2008年第6期13-16,共4页Journal of Shijiazhuang University

摘　　要：比较和讨论了强钡星和弱钡星s-元素的丰度与趋势,探索了强钡星和弱钡星之间的不同和相似.在所取的样品星范围内,强钡星和弱钡星金属丰度的范围没有明显的区别,但较重s-过程元素和较轻s-过程元素丰度平均值的比[hs/Is]不同,这可能是由于它们的伴星-AGB星进行s-过程核合成时中子幅照量不同.所取样品星的丰度数据的讨论结果并不支持强钡星和弱钡星s-元素超丰程度的不同是与金属丰度有关这一结论.This paper compares and discusses s-elements abundances and trends in strong barium stars and mild barium stars, probing into the differences and similarities between strong barium stars and mild barium stars. The different levels of s-proedss overabundances of strong barium stars and mild barium stars were earlier suggested to be related to the stellar metallicity. However, at least in the range of parameters defined by our sample, there is no significant difference in metallicity range between strong barium stars and mild barium stars. The different [hs/Is] of strong barium stars and mild barium stars seems to be different in neutron exposure when s-process nueleosynthesizes in its companion AGB star.

关 键 词：钡星 s-过程元素 丰度 

分 类 号：P142.9[天文地球—天体物理]