Two-dimensional simulation of convection in a red giant envelope

S. M. Asida*, Y. Tuchman

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

The problem of modeling the convection in red giant envelopes is addressed with two-dimensional nonlinear and nonadiabatic simulations. Hydrostatic envelopes, in thermal equilibrium, were integrated using the mixing-length theory (MLT) for different values of the mixing-length parameter λ. We examined the energy balance for two-dimensional simulations by using the MLT envelopes as initial model. On the basis of these two-dimensional simulations, we identify a model that is close to two-dimensional equilibrium. Such a model is characterized by an initial mixing-length parameter. Its value depends upon the numerical resolution, varying from 1.0 for low resolution to 1.5 for the best resolution at present.

Original languageAmerican English
Pages (from-to)L47-L50
JournalAstrophysical Journal
Volume491
Issue number1 PART II
DOIs
StatePublished - 1997

Keywords

  • Convection
  • Methods: numerical
  • Stars: AGB and post-AGB
  • Stars: atmospheres

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