| 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 |
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| 引用本文： | 马坤,吴海滨.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[J].石家庄学院学报,2012,14(3):35-38. |
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| 作者姓名： | 马坤 吴海滨 |
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| 作者单位： | 1. 沧州师范学院物理与电子信息系,河北沧州,061001
2. 石家庄学院物理系,河北石家庄,050035 |
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| 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.
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| 关 键 词： | 核合成 参数化模型 AGB星 s+r星 |
An Investigation into the Parametric Model for the Elemental Abundances in the s-and r-rich Metal-poor Star CS 31062-050 |
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| MA Kun,WU Hai-bin.An Investigation into the Parametric Model for the Elemental Abundances in the s-and r-rich Metal-poor Star CS 31062-050[J].Journal of Shijiazhuang University,2012,14(3):35-38. |
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| Authors: | MA Kun WU Hai-bin |
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| Institution: | 1.Dept.of Physics & Electronic Information,Cangzhou Normal University,Changzhou,Hebei 061001,China; 2.Dept.of Physics,Shijiazhuang University,Shijiazhuang,Hebei 050035,China) |
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| Abstract: | 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(M<3～4 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. |
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| Keywords: | nucleosynthesis parametric model AGB-star s+r star |
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