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Nucleosynthesis as a result of multiple delayed detonations in Type Ia

By Domingo García-senz Ab and Eduardo Bravo Ab


The explosion of a white dwarf of mass 1.36 M ⊙ has been simulated in three dimensions with the aid of a SPH code. The explosion follows the delayed detonation paradigma. In this case the deflagration-detonation transition is induced by the large corrugation of the flame front resulting from Rayleigh-Taylor instability and turbulence. The nucleosynthetic yields have been calculated, showing that some neutronized isotopes such as 54 Fe or 58 Ni are not overproduced with respect to the solar system ratios. The distribution of intermediate-mass elements is also compatible with the spectra of normal SNIa. The excepcion is, however, the abundance of carbon and oxygen, which are overproduced. 1

Year: 2002
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