ON THE THEORY OF TYPE IA SUPERNOVA EVENTS

A physical scenario of white dwarf burning in Type Ia supernova events is proposed which includes the consequent stages of flame, spontaneou s explosion and detonation. The flame is ignited locally at several po ints near the center of the star. The bubbles of light burnt matter, t ogether with the flame, are pushed out of the center, so that almost a ll hot fuel of the central part of the star remains unburnt by the fla me. The unburnt fuel explodes spontaneously after a time delay determi ned by the average temperature at the center of the star. The spontane ous explosion triggers the detonation, which incinerates the rest of t he pre-expanded star. The proposed scenario explains the delayed trigg ering of the detonation in white dwarfs and provides the physical basi s for a self-consistent theory of Supernovae Ia.