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Beyond the Bubble Catastrophe of Type Ia Supernovae: Pulsating Reverse Detonation Models

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...

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Published in:	The Astrophysical journal 2006-05, Vol.642 (2), p.L157-L160
Main Authors:	Bravo, Eduardo, García-Senz, Domingo
Format:	Article
Language:	English
Subjects:	Astronomia i astrofísica Astronomy Earth, ocean, space Exact sciences and technology Física Supernovae Supernoves Àrees temàtiques de la UPC
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description	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 61 M sub( )composed of carbon and oxygen, inducing a converging detonation. A three-dimensional simulation of the explosion produced a kinetic energy of 1.05 x 10 super(51) ergs and 0.70 M sub( )of super(56)Ni, ejecting scarcely 0.01 M sub( )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-ray and UV wavelengths.
doi_str_mv	10.1086/504713
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subjects	Astronomia i astrofísica Astronomy Earth, ocean, space Exact sciences and technology Física Supernovae Supernoves Àrees temàtiques de la UPC
title	Beyond the Bubble Catastrophe of Type Ia Supernovae: Pulsating Reverse Detonation Models
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