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Flame fronts in Supernovae Ia and their pulsational stability

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arxiv 1208.4038 v2 pith:GHREADEP submitted 2012-08-20 astro-ph.HE physics.plasm-ph

S.I. Glazyrin , S.I. Blinnikov , A.D. Dolgov This is my paper · ORCID
classification astro-ph.HEphysics.plasm-ph
keywords flamesupernovaezeldovichfronthydrodynamicsnumberpulsationsresults
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The structure of the deflagration burning front in type Ia supernovae is considered. The parameters of the flame are obtained: its normal velocity and thickness. The results are in good agreement with the previous works of different authors. The problem of pulsation instability of the flame, subject to plane perturbations, is studied. First, with the artificial system with switched-off hydrodynamics the possibility of secondary reactions to stabilize the front is shown. Second, with account of hydrodynamics, realistic EOS and thermal conduction we can obtain pulsations when Zeldovich number was artificially increased. The critical Zeldovich numbers are presented. These results show the stability of the flame in type Ia supernovae against pulsations because its effective Zeldovich number is small.

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  1. Modeling subgrid combustion processes in simulations of thermonuclear supernovae

    astro-ph.SR 2019-08 unverdicted novelty 1.0 of 10

    This is a review of subgrid combustion modeling for type Ia supernova simulations, covering deflagration-detonation transition and double detonation scenarios, with no new quantitative results.

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