钡星重元素丰度的研究  

Surface abundances of heavy elements in Barium stars

作　　者：张彩霞[1] 张江[2] 崔文元[3] 耿媛媛[3] 张波[3] 

机构地区：[1]石家庄学院物理系,河北石家庄050035 [2]石家庄经济学院数理学院,河北石家庄050031 [3]河北师范大学物理科学与信息工程学院,河北石家庄050016

出　　处：《河北科技大学学报》2009年第3期185-188,共4页Journal of Hebei University of Science and Technology

基　　金：国家自然科学基金资助项目(10847119)

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。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.

关 键 词：钡星 AGB星 参数化模型 

分 类 号：P144.9[天文地球—天体物理]