Physics – Nuclear Physics
Scientific paper
Oct 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aps..dnp..cd09m&link_type=abstract
American Physical Society, Division of Nuclear Physics Meeting, October 2-5, 1996, abstract #CD.09
Physics
Nuclear Physics
Scientific paper
We begin our simulations with postbounce slices from realistic one-dimensional simulations that implement multigroup flux-limited diffusion (MGFLD). The two-dimensional hydrodynamics is evolved using an extended version of the piecewise parabolic method code VH-1. The code makes use of running boundary conditions specified by the one-dimensional MGFLD simulations. Local neutrino heating and cooling and local matter deleptonization, using the neutrino distribution functions from the one-dimensional MGFLD simulations, are included. In the absence of deleptonization and neutrino heating and cooling, prompt convection develops and dissipates on a time scale of 15--20 milliseconds. The convection at larger radii, seeded by prompt convection, distorts the sphericity of the shock, but in an average sense, does not move the stalled shock farther out in radius relative to the one-dimensional MGFLD simulations. Including deleptonization and neutrino heating and cooling prevents prompt convection from developing at all. Both fifteen and twenty-five solar mass models are discussed.
Blondin John M.
Bruenn Stephen W.
Calder Alan C.
Guidry Michael W.
Mezzacappa Anthony
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