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Title:
Thermonuclear supernova models, and observations of Type Ia supernovae
Authors:
Bravo, E.; Badenes, C.; García-Senz, D.
Affiliation:
AA(Dept. Física i Enginyeria Nuclear, UPC, Av. Diagonal 647, 08028 Barcelona; Institut d'Estudis Espacials de Catalunya, Barcelona), AB(Dept. Physics and Astronomy, Rutgers Univ., 136 Frelinghuysen Rd., Piscataway NJ 08854-8019), AC(Dept. Física i Enginyeria Nuclear, UPC, Av. Diagonal 647, 08028 Barcelona; Institut d'Estudis Espacials de Catalunya, Barcelona)
Publication:
INTERACTING BINARIES: Accretion, Evolution, and Outcomes. AIP Conference Proceedings, Volume 797, pp. 453-462 (2005). (AIPC Homepage)
Publication Date:
10/2005
Origin:
STI
NASA/STI Keywords:
supernovae, nucleosynthesis, X-ray spectra, supernova remnants, numerical analysis
PACS Keywords:
Supernovae, Nucleosynthesis in novae, supernovae, and other explosive environments, Nuclear physics aspects of novae, supernovae, and other explosive environments
DOI:
10.1063/1.2130267
Bibliographic Code:
2005AIPC..797..453B

Abstract

In this paper, we review the present state of theoretical models of thermonuclear supernovae, and compare their predicitions with the constraints derived from observations of Type Ia supernovae. The diversity of explosion mechanisms usually found in one-dimensional simulations is a direct consequence of the impossibility to resolve the flame structure under the assumption of spherical symmetry. Spherically symmetric models have been successful in explaining many of the observational features of Type Ia supernovae, but they rely on two kinds of empirical models: one that describes the behaviour of the flame on the scales unresolved by the code, and another that takes account of the evolution of the flame shape. In contrast, three-dimensional simulations are able to compute the flame shape in a self-consistent way, but they still need a model for the propagation of the flame in the scales unresolved by the code. Furthermore, in three dimensions the number of degrees of freedom of the initial configuration of the white dwarf at runaway is much larger than in one dimension. Recent simulations have shown that the sensitivity of the explosion output to the initial conditions can be extremely large. New paradigms of thermonuclear supernovae have emerged from this situation, as the Pulsating Reverse Detonation. The resolution of all these issues must rely on the predictions of observational properties of the models, and their comparison with current Type Ia supernova data, including X-ray spectra of Type Ia supernova remnants.
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