s-过程与r-过程元素均超丰的贫金属星CS 31062-050的参数化研究

摘要

利用参数化模型研究了s-过程与r-过程元素均超丰的贫金属星（s＋r星）CS 31062-050的观测丰度.计算得到,原AGB星的重叠因子取值为0.35,其初始质量应小于3～4 M⊙.s-过程分量系数Cs为0.002 7,r-过程分量系数Cr为70.5,Cs与Cr取值较高,这是对CS 31062-050形成于AIC机制的一个有力支持.%In this paper,the authors use the parametric model to fit the elemental abundances observed in the s-and r-rich,very metal-poor star（s＋r star） CS 31062-050.The value of overlap factor in the AGB star is 0.35;this value could possibly be explained by the binary system with low-mass AGB star（M3～4 M⊙）.The component coefficient of the s-process is 0.002 7.The component coefficient of the r-process is 70.5.The high value of Cs and Cr provides strong support for the scenario that the r-process material in CS 31062-050 comes from an AIC.