Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011apj...740....8z&link_type=abstract
The Astrophysical Journal, Volume 740, Issue 1, article id. 8 (2011).
Astronomy and Astrophysics
Astronomy
1
Convection, Hydrodynamics, Methods: Numerical, Nuclear Reactions, Nucleosynthesis, Abundances, Supernovae: General, White Dwarfs
Scientific paper
The convective flow in the moments preceding the explosion of a Type Ia supernova determines where the initial flames that subsequently burn through the star first ignite. We continue our exploration of the final hours of this convection using the low Mach number hydrodynamics code, MAESTRO. We present calculations exploring the effects of slow rotation and show diagnostics that examine the distribution of likely ignition points. In the current calculations, we see a well-defined convection region persist up to the point of ignition, and we see that even a little rotation is enough to break the coherence of the convective flow seen in the radial velocity field. Our results suggest that off-center ignition may be favored, with ignition ranging out to a radius of 100 km and a maximum likelihood of ignition at a radius around 50 km.
Almgren Ann S.
Bell John B.
Malone Christopher M.
Nonaka Andrew
Woosley Stan E.
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