摘要
根据观测到的极贫金属星中元素Sr,Y,Ba与元素Si丰度的相关性,利用WW1995与FM2004给出的Ⅱ型超新星Si的理论产量计算了极贫金属环境下各种质量超新星r-过程元素的核合成产量,将所得结果与前人的结果作了对比;进一步讨论了星系化学演化中r-过程元素核合成的主要产量区间.
The yields of r-process nucleosynthesis in type II supernovae explosion(SNe II) with various masses in the extremely metal-poor environments on the basis of the observed correlations between the neutron-capture process elements Sr,Y,Ba and Si elements and the theoretical yields of Si calculated by WW1995 and FM2004 for SNe II are calcucated.The results are compared with those from literature.Furthermore,the main product site of r-process nucleosynthesis in the Galactic chemical evolution theory is discussed.
出处
《河北师范大学学报(自然科学版)》
CAS
北大核心
2010年第3期304-309,共6页
Journal of Hebei Normal University:Natural Science
基金
国家自然科学基金(10673002)
关键词
极贫金属星
元素丰度
r-过程核合成产量
产量区间
extremely metal-poor stars
element abundance
r-process nucleosynthetic yield
main product site