کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1772014 | 1020914 | 2011 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A Study on the Abundance Distribution of Heavy Elements in Metal-poor Stars by the Parameterization Method
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
نجوم و فیزیک نجومی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: A Study on the Abundance Distribution of Heavy Elements in Metal-poor Stars by the Parameterization Method A Study on the Abundance Distribution of Heavy Elements in Metal-poor Stars by the Parameterization Method](/preview/png/1772014.png)
چکیده انگلیسی
Based on a large amount of observed data of element abundances in metal-poor stars, taking the abundance distribution of heavy elements in the solar system as a standard, and selecting Sr, Ba and Eu as the typical elements of the three nucleosynthetic processes in metal-poor stars, namely the weak sprocess, main s-process and r-process, we have studied the contributions of the three kinds of neutron-capture processes to the abundance distribution of heavy elements in metal-poor stars, with the parameterization method. It is found that the higher the metal abundance, the greater the contributions of the weak s-process and the chief s-process to the abundances of lighter neutron-capture elements. The heavier neutron-capture elements are mainly produced by the r-process and the chief s-process; and that at low metallicity, the abundances of heavy neutron-capture elements are mainly produced by the r-process. In the early Galaxy, the weak s-process has almost no contribution to the element abundance.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chinese Astronomy and Astrophysics - Volume 35, Issue 1, JanuaryâMarch 2011, Pages 29-36
Journal: Chinese Astronomy and Astrophysics - Volume 35, Issue 1, JanuaryâMarch 2011, Pages 29-36
نویسندگان
Xie Ge-Ying, Zhang Bo, Li Hong-Jie, Hu Jin-Jiang, Li Chen-Pu,