Further adventures: Oxygen burning in a convective shell

S. M. Asida, W David Arnett

Research output: Contribution to journalArticle

45 Citations (Scopus)

Abstract

Two-dimensional hydrodynamical simulations of a convective oxygen burning shell in the presupernova evolution of a 20 M star are extended to later times. We used the VULCAN code to simulate longer evolution times than previously possible. Our results confirm the previous work of Bazàn & Arnett over their time span (400 s). However, at 1200 s we could identify a new steady state that is significantly different from the original one-dimensional model. There is considerable overshooting at both the top and bottom boundaries of the convection zone. Beyond the boundaries, the convective velocity falls off exponentially, with excitation of internal modes. The resulting mixing greatly affects the evolution of the simulations. Connections with other works of simulation of convection, in which such behavior is found in a different context, are discussed.

Original languageEnglish (US)
Pages (from-to)435-443
Number of pages9
JournalAstrophysical Journal
Volume545
Issue number1 PART 1
StatePublished - Dec 10 2000

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shell
oxygen
convection
simulation
M stars
excitation
code

Keywords

  • Convection
  • Methods: numerical
  • Nuclear reactions, nucleosynthesis, abundances
  • Supernovae: general

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Further adventures : Oxygen burning in a convective shell. / Asida, S. M.; Arnett, W David.

In: Astrophysical Journal, Vol. 545, No. 1 PART 1, 10.12.2000, p. 435-443.

Research output: Contribution to journalArticle

Asida, S. M. ; Arnett, W David. / Further adventures : Oxygen burning in a convective shell. In: Astrophysical Journal. 2000 ; Vol. 545, No. 1 PART 1. pp. 435-443.
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