Convection above the Neutrinosphere in Type II Supernovae
Abstract
We performed several twodimensional calculations of a Type II supernova explosion through the first 0.4 s past bounce, to examine the effect of convection on the shock. We used the twodimensional code to compute a convective velocity to compare with the Mayle and Wilson (MW, 1993) onedimensional code (which includes more of the relevant physics) and find that the MW code does not produce an explosion using the twodimensional convective velocity. We find that convection develops exponentially with a growth rate of about 100/s. If the initial perturbation is sufficient, this instability grows enough to develop significant convective velocities. The convective eddies then deliver energy to the shock. We present results from several runs with varying sizes of initial perturbation, as well as a case with no initial perturbation but including the effects of rotation. We see that convection enhances the outward propagation of the shock.
 Publication:

The Astrophysical Journal
 Pub Date:
 September 1993
 DOI:
 10.1086/173163
 Bibcode:
 1993ApJ...415..278M
 Keywords:

 Neutrinos;
 Particle Acceleration;
 Shock Wave Propagation;
 Stellar Convection;
 Stellar Luminosity;
 Supernovae;
 Hydrodynamic Equations;
 Two Dimensional Models;
 Astrophysics;
 ACCELERATION OF PARTICLES;
 CONVECTION;
 HYDRODYNAMICS;
 SHOCK WAVES;
 STARS: INTERIORS;
 STARS: SUPERNOVAE: GENERAL