The effects of general relativity on core collapse supernovae
The effects of general relativity (GR) on the hydrodynamics and neutrino transport are examined during the critical shock reheating phase of core collapse supernovae. The authors find that core collapse computed with GR hydrodynamics results in a substantially more compact core structure out to the shock, the shock radius at stagnation being reduced by a factor of 2. The inflow speed of material behind the shock is also increased by a factor of 2 throughout most of the evolution. They have developed a code for general relativistic multigroup flux-limited diffusion (MGFLD) in static spacetimes and compared the steady-state neutrino distributions for selected time slices of post-bounce models with those computed with Newtonian MGFLD. The GR transport calculations show the expected reductions in neutrino luminosities and rms energies from redshift and curvature effects. Although the effects of GR on the hydrodynamics and neutrino transport seem to work against shock revival, the core configurations are sufficiently different that no firm conclusions can be drawn, except that simulations of core collapse supernovae using Newtonian hydrodynamics and transport are not realistic.
- Florida Atlantic Univ., Boca Raton, FL (United States). Physics Dept.
- Oak Ridge National Lab., TN (United States). Physics Div.
- Publication Date:
- OSTI Identifier:
- Report Number(s):
- ORNL/CP--98112; CONF-971208--
ON: DE98005657; BR: KB0300000; CNN: Grant NSF-PHY94-07194; TRN: AHC2DT05%%281
- DOE Contract Number:
- Resource Type:
- Resource Relation:
- Conference: 2. Oak Ridge symposium on atomic and nuclear astrophysics, Oak Ridge, TN (United States), 2-6 Dec 1997; Other Information: PBD: Dec 1997
- Research Org:
- Oak Ridge National Lab., TN (United States)
- Sponsoring Org:
- USDOE Office of Energy Research, Washington, DC (United States);National Science Foundation, Washington, DC (United States)
- Country of Publication:
- United States
- 66 PHYSICS; SUPERNOVAE; GENERAL RELATIVITY THEORY; HYDRODYNAMICS; SHOCK WAVES; NEUTRINOS; RADIATION TRANSPORT; STAR MODELS; R PROCESS
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