Phases of a Type Ia supernova explosion

Details Phases of a Type Ia supernova explosion Phases of a Type Ia supernova explosion

1998-02-13

arxiv.org/abs/astro-ph/9802182v1

Astronomy and Astrophysics

Astrophysics

5 pages, to appear in the proceedings of the Second Oak Ridge Symposium on Atomic and Nuclear Astrophysics. See also http://

Scientific paper

In the framework of the Chandrasekhar mass white dwarf model for Type Ia supernovae, various stages of the explosion are described in terms of the burning regimes of the thermonuclear flame front. In the early flamelet regime following the ``smoldering'' phase prior to the explosion, the flame is sufficiently thin and fast to remain laminar on small scales. As the white dwarf density declines, the thermal flame structure becomes subject to penetration by turbulent eddies, and it enters the ``distributed burning'' regime. A specific control parameter for this transition is proposed. Furthermore, we outline an argument for the coincidence of the transition between burning regimes with the onset of a deflagration-detonation-transition (DDT) in the late phase of the explosion.

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