Effects of a new 3-alpha reaction on the s-process in massive stars

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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Effect of a new 3-alpha reaction rate on the s-process during the evolution of a massive star of 25 solar mass is investigated for the first time, because the s-process in massive stars have been believed to be established with only minor change. We find that the s-process with use of the new rate during the core helium burning is very inefficient compared to the case with the previous 3-alpha rate. However, the difference of the overproduction is found to be largely compensated by the subsequent carbon burning. Since the s-process in massive stars has been attributed so far to the neutron irradiation during core helium burning, our finding reveals for the first time the importance of the carbon burning for the s-process during the evolution of massive stars.

Original languageEnglish
Title of host publicationOrigin of Matter and Evolution of Galaxies 2011
Pages384-386
Number of pages3
DOIs
Publication statusPublished - Dec 1 2012
EventInternational Symposium on Origin of Matter and Evolutions of Galaxies 2011, OMEG 2011 - Wako, Japan
Duration: Nov 14 2011Nov 17 2011

Publication series

NameAIP Conference Proceedings
Volume1484
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

OtherInternational Symposium on Origin of Matter and Evolutions of Galaxies 2011, OMEG 2011
CountryJapan
CityWako
Period11/14/1111/17/11

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Plant Science
  • Physics and Astronomy(all)
  • Nature and Landscape Conservation

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