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极贫金属星元素核合成产量:Sr、Y

The Nucleosynthetic Yield of the Extremely Metal-poor Stars:Sr、Y
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摘要 通过将极贫金属星较轻中子俘获元素丰度可能存在两个分支,i支和y支,其中i支元素丰度产生于较低质量超新星(11~22M⊙),y支元素丰度产生于较高质量超新星(22~35M⊙),计算了极贫金属环境([Fe/H]〈-2.5)下各种质量超新星较轻中子俘获元素Sr、Y的核合成产量,并与前人的研究结果进行了对比。 The abundance of light neutron-capture elements of extremely metal-poor stars may have two branches: i y,among which i branch exists in the lower quality supernova(11~22M⊙),and y branch exists in the higher quality supernova(22~35M⊙).In view of this,the yields are calculated repeatedly and the same results are obtained as Chieffi 2004,which shows the assumption may be correct.
作者 马文娟 单勇
出处 《沧州师范学院学报》 2011年第2期115-117,共3页 Journal of Cangzhou Normal University
基金 河北省教育厅高等学校自然科学研究指导计划项目"AGB星s-过程核合成区域的中子辐照量分布" 编号:No.Z2010108 沧州市科技局科学技术研究与发展指导计划科技支撑项目"极贫金属星元素丰度及II型超新星核合成产量" 编号:No.10ZD19
关键词 元素 核合成 极贫金属星 element nucleosynthetic yield extremely metal-poor stars
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参考文献17

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二级参考文献30

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