On the theory of supernova type Ia explosion.

Details On the theory of supernova type Ia explosion. On the theory of supernova type Ia explosion.

Mar 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000jphyc..10..467l&link_type=abstract

Journal de Physique Colloque, Vol. 10, No. 5, p. 467 - 472

Physics

Supernovae: Stellar Evolution, Supernovae: Explosions, Supernovae: White Dwarfs

Scientific paper

A self-consistent model of a white dwarf burning in supernova Ia events is presented which includes the consequent stages of the flame, the spontaneous explosion and the detonation. The spontaneous explosion triggers the detonation, which incinerates the rest of the pre-expanded star. The expansion of the white dwarf during the flame stage of burning leads to the production of intermediate mass elements (S, Si, Ca etc.) in agreement with the observed spectrum. Stability analysis of the thermonuclear detonation in a white dwarf shows that the detonation is unstable and self-quenching at high densities of the degenerate matter ρ > 2.1·107 g/cm3 and it becomes stable at lower densities. The detonation overcomes gravitational binding and causes mass ejection. The proposed theory provides the physical basis for the explanation of the observed spectrum of supernovae Ia.

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