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Pulsating Reverse Detonation Models of Type Ia Supernovae. II. Explosion

Bravo, Eduardo and Garcia-Senz, Domingo and Cabezon, Ruben M. and Dominguez, Inmaculada. (2009) Pulsating Reverse Detonation Models of Type Ia Supernovae. II. Explosion. Astrophysical Journal, 695 (2). pp. 1257-1272.

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Official URL: https://edoc.unibas.ch/68727/

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Abstract

Observational evidences point to a common explosion mechanism of Type Ia supernovae based on a delayed detonation of a white dwarf (WD). However, all attempts to find a convincing ignition mechanism based on a delayed detonation in a destabilized, expanding, white dwarf have been elusive so far. One of the possibilities that has been invoked is that an inefficient deflagration leads to pulsation of a Chandrasekhar-mass WD, followed by formation of an accretion shock that confines a carbon-oxygen rich core, while transforming the kinetic energy of the collapsing halo into thermal energy of the core, until an inward moving detonation is formed. This chain of events has been termed Pulsating Reverse Detonation (PRD). In this work, we present three-dimensional numerical simulations of PRD models from the time of detonation initiation up to homologous expansion. Different models characterized by the amount of mass burned during the deflagration phase, M  defl , give explosions spanning a range of kinetic energies, K ~ (1.0-1.2) × 10 51 erg, and  56 Ni masses, M( 56 Ni) ~ 0.6-0.8 M sun , which are compatible with what is expected for typical Type Ia supernovae. Spectra and light curves of angle-averaged spherically symmetric versions of the PRD models are discussed. Type Ia supernova spectra pose the most stringent requirements on PRD models.
Faculties and Departments:05 Faculty of Science > Departement Physik > Former Organization Units Physics > Theoretische Physik Astrophysik (Thielemann)
10 Zentrale universitäre Einrichtungen > SciCore
UniBasel Contributors:Cabezon, Ruben M.
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:IOP Publishing
ISSN:0004-637X
e-ISSN:1538-4357
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:08 Oct 2019 09:47
Deposited On:08 Oct 2019 09:47

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