Effects of a new triple-α reaction on the s-process in massive stars

Yukihiro Kikuchi, Masaomi Ono, Yasuhide Matsuo, Masa Aki Hashimoto, Shin Ichiro Fujimoto

研究成果: ジャーナルへの寄稿学術誌査読

5 被引用数 (Scopus)

抄録

Effects of a new triple-α reaction rate on the s-process during the evolution of a massive star of 25 M are investigated for the first time. Although the s-process in massive stars has been believed to be established with only minor change, we find that the s-process with use of the new rate during the core He-burning is very inefficient compared to the case with the previous triple-α rate. However, the difference of the overproduction is found to be largely compensated by the subsequent C-burning. Since the s-process in massive stars has been attributed so far to the neutron irradiation during core He-burning, our finding reveals the importance of C-burning for the s-process during the evolution of massive stars. Since the overproduction level is not different as a whole for the two distinctly different rates, the weak s-process in massive stars does not testify the validity of the new rate.

本文言語英語
ページ(範囲)171-178
ページ数8
ジャーナルProgress of Theoretical Physics
127
1
DOI
出版ステータス出版済み - 1月 2012

!!!All Science Journal Classification (ASJC) codes

  • 物理学および天文学(その他)

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