Three Dimensional Simulations of Supernova Explosion. I : Astrophysics and Relativity

概要

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We have performed three dimensional numerical simulations of supernova explosions using (200)^3 rectangular grids. As initial density distribution, we consider N=3 polytrope and the realistic presupernova star model (M11) computed by Nomoto.For each calculation we put small random perturbations in pressure and velocity. In the case N=3 polytropic star, although the fluctuation grows once, it stops growing. As a result no significant growth of fluctuations occurs except for extremely large initial perturbations. This is completely different from the preliminary simulations by Nagasawa et al. using a smoothed particle method with a small number of particles. In realistic star cases, perturbations put at the density gap corresponding to the hydrogen burning shell grow very large, which is consistent with linear analysis.
理論物理学刊行会の論文
1990-09-25