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Surface and Core Detonations in Rotating White Dwarfs

Garcia-Senz, D. and Cabezon, R. and Dominguez, I.. (2018) Surface and Core Detonations in Rotating White Dwarfs. The Astrophysical Journal. Supplement Series, 862 (27). pp. 1-16.

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Official URL: https://edoc.unibas.ch/68723/

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Abstract

The feasibility of the double detonation mechanism -surface helium detonation followed by complete carbon detonation of the core- in a rotating white dwarf with mass ≃1 M⊙ is studied using three-dimensional hydrodynamic simulations. A rapid rigid rotation of the white dwarf was assumed, so that its initial spherical geometry is considerably distorted. Unlike spherically symmetric models, we found that when helium ignition is located far from the spinning axis, the detonation fronts converge asynchronically at the antipodes of the ignition point. Nevertheless, the detonation of the carbon core still remains as the most probable outcome. The detonation of the core gives rise to a strong explosion, matching many of the basic observational constraints of Type Ia supernovae (SNe Ia). We conclude that the double detonation mechanism also works when the white dwarf is rapidly rotating. These results provide further evidence for the viability of sub-Chandrasekhar-mass models as well as some double degenerate models (those having some helium fuel at the merging moment), making them appealing channels for the production of SN Ia events.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Theoretische Physik Astrophysik (Thielemann)
10 Zentrale universitäre Einrichtungen > SciCore
UniBasel Contributors:Cabezon, Ruben M.
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:University of Chicago Press
ISSN:0067-0049
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:31 Jan 2019 14:03
Deposited On:31 Jan 2019 14:03

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