Low Mach Number Modeling of Type Ia Supernovae. III. Reactions

Details Low Mach Number Modeling of Type Ia Supernovae. III. Reactions Low Mach Number Modeling of Type Ia Supernovae. III. Reactions

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008apj...684..449a&link_type=abstract

The Astrophysical Journal, Volume 684, Issue 1, pp. 449-470.

Astronomy and Astrophysics

Astronomy

8

Convection, Hydrodynamics, Methods: Numerical, Nuclear Reactions, Nucleosynthesis, Abundances, Stars: Supernovae: General, Stars: White Dwarfs

Scientific paper

We continue the description of a low Mach number hydrodynamics algorithm for reacting, full star flows. Here we demonstrate how to accurately incorporate reactions using a second-order accurate Strang-splitting technique. We also improve the fidelity of the model by allowing the base state to evolve in response to large-scale convection as well as large-scale heating, taking care to account for the compositional changes to the base state as well. The new algorithm is tested via comparisons with a fully compressible code and shown to be in good agreement. The resulting code, MAESTRO, once extended to incorporate a spherically symmetric base state, will be used to study the convection and ignition phases of Type Ia supernovae.

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