Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-06-08
Astrophys.J.667:375-381,2007
Astronomy and Astrophysics
Astrophysics
19 pages, 6 figures, submitted to ApJ
Scientific paper
10.1086/520755
We present the results of numerical experiments, in which we have investigated the influence of the inelastic neutrino-helium interactions on the standing accretion shock instability supposed to occur in the post-bounce supernova core. The axisymmetric hydrodynamical simulations of accretion flows through the standing accretion shock wave onto the protoneutron star show that the interactions are relatively minor and the linear growth of the shock instability is hardly affected. The extra heating given by the inelastic reactions becomes important for the shock revival after the instability enters the non-linear regime, but only when the neutrino luminosity is very close to the critical value, at which the shock would be revived without the interactions. We have also studied the dependence of the results on the initial amplitudes of perturbation and the temperatures of mu and tau neutrinos.
Kotake Kei
Ohnishi Naofumi
Yamada Shoichi
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