Sensitivity of the C and O production on the 3α rate

H. Schlattl, A. Heger, H. Oberhummer, T. Rauscher, A. Csótó

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

We investigate the dependence of the carbon and oxygen production in stars on the 3α rate by varying the energy of the 02 +-state of 12C and determine the resulting yields for a selection of low-mass, intermediate-mass and massive stars. The yields are obtained using modern stellar evolution codes that follow the entire evolution of massive stars, including the supernova explosion, and consider in detail the 3rd dredge-up process during the thermally pulsating asymptotic giant branch of low-mass and intermediate-mass stars. Our results show that the C and O production in massive stars depends strongly on the initial mass, and that it is crucial to follow the entire evolution. A rather strong C production during the He-shell flashes compared to quiescent He burning leads to a lower sensitivity of the C and O production in low-mass and intermediate-mass stars on the 3α-rate than predicted in our previous work. In particular, the C production of intermediate-mass stars seems to have a maximum close to the actual value of the 02+ energy level of 12C.

Original languageEnglish
Pages (from-to)27-56
Number of pages30
JournalAstrophysics and Space Science
Volume291
Issue number1
DOIs
Publication statusPublished - Jul 14 2004

    Fingerprint

Keywords

  • Evolution
  • Interiors
  • Late-type
  • Stars: abundances

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this