【摘要】 提出了一种计算钡星重元素丰度的参数化模型,利用此模型很好地拟合了8颗钡星的重元素丰度,说明提出模型的有效性。对最佳拟合参数进行了比较和讨论,得到以下主要结论:强钡星的s-过程分量系数明显大于弱钡星的s-过程分量系数,强钡星和弱钡星的中子辐照量、重叠因子没有明显区别,它们的s-元素超丰程度不同主要是因为钡星系统轨道周期不同。更多还原

【Abstract】 A new parametric model on the abundances of heavy elements Barium stars(i.e.Ba stars) has been proposed and applied to 8 Ba stars,whose calculating results well fit the observation.After detailed analysis about the best fitting parameters,the main conclusions have been made as follows: The s-process-component coefficients of strong Ba stars are obviously greater than those of mild Ba stars,while the neutron exposure and overlap factors of the former are much similar to those of the latter.Consequently,their differences over abundance of s-rich element probably come of the different orbital period of their double star system.更多还原