http://arxiv.org/abs/1508.00218
We show that the standing accretion shock instability (SASI) that has been used to ease the shock revival in core collapse supernovae (CCSNe) neutrino-driven explosion models, might play a much more decisive role in supplying the stochastic angular momentum required to trigger an explosion with jittering jets. To play a minor role in neutrino-based explosion models, the kinetic energy of the gas inside the stalled shock associated with the transverse (non-radial) motion should be about more than ten percent of the energy of the accreted gas. We find that this implies a stochastic angular momentum that can reach about five percent of the Keplerian specific angular momentum around the newly born neutron star. Such an accretion flow leaves an open conical region along the poles with an average opening angle of about 5 degrees. The outflow from the open polar region powers an explosion according to the jittering-jets model.
O. Papish, A. Gilkis and N. Soker
Tue, 4 Aug 15
17/54
Comments: Submitted for publication