Beyond the bubble catastrophe of Type Ia supernovae: Pulsating Reverse Detonation models

Details Beyond the bubble catastrophe of Type Ia supernovae: Pulsating Reverse Detonation models Beyond the bubble catastrophe of Type Ia supernovae: Pulsating Reverse Detonation models

2006-04-03

arxiv.org/abs/astro-ph/0604025v1

Astrophys.J. 642 (2006) L157-L160

Astronomy and Astrophysics

Astrophysics

Accepted for The Astrophysical Journal Letters, 12 pages, 3 figures

Scientific paper

10.1086/504713

We describe a mechanism by which a failed deflagration of a Chandrasekhar-mass carbon-oxygen white dwarf can turn into a successful thermonuclear supernova explosion, without invoking an ad hoc high-density deflagration-detonation transition. Following a pulsating phase, an accretion shock develops above a core of 1 M_sun composed of carbon and oxygen, inducing a converging detonation. A three-dimensional simulation of the explosion produced a kinetic energy of 1.05E51 ergs and 0.70 M_sun of 56Ni, ejecting scarcely 0.01 M_sun of C-O moving at low velocities. The mechanism works under quite general conditions and is flexible enough to account for the diversity of normal Type Ia supernovae. In given conditions the detonation might not occur, which would reflect in peculiar signatures in the gamma and UV-wavelengths

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