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

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)171-178
Number of pages8
JournalProgress of Theoretical Physics
Volume127
Issue number1
DOIs
Publication statusPublished - Jan 1 2012

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massive stars
neutron irradiation
reaction kinetics

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

Kikuchi, Y., Ono, M., Matsuo, Y., Hashimoto, M. A., & Fujimoto, S. I. (2012). Effects of a new triple-α reaction on the s-process in massive stars. Progress of Theoretical Physics, 127(1), 171-178. https://doi.org/10.1143/PTP.127.171

Effects of a new triple-α reaction on the s-process in massive stars. / Kikuchi, Yukihiro; Ono, Masaomi; Matsuo, Yasuhide; Hashimoto, Masa Aki; Fujimoto, Shin Ichiro.

In: Progress of Theoretical Physics, Vol. 127, No. 1, 01.01.2012, p. 171-178.

Research output: Contribution to journalArticle

Kikuchi, Y, Ono, M, Matsuo, Y, Hashimoto, MA & Fujimoto, SI 2012, 'Effects of a new triple-α reaction on the s-process in massive stars', Progress of Theoretical Physics, vol. 127, no. 1, pp. 171-178. https://doi.org/10.1143/PTP.127.171
Kikuchi, Yukihiro ; Ono, Masaomi ; Matsuo, Yasuhide ; Hashimoto, Masa Aki ; Fujimoto, Shin Ichiro. / Effects of a new triple-α reaction on the s-process in massive stars. In: Progress of Theoretical Physics. 2012 ; Vol. 127, No. 1. pp. 171-178.
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