New developments in the mechanism for core-collapse supernovae
- Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics
Recent results indicate that the standard type-2 supernova scenario in which the shock wave stagnates but is reenergized by neutrino heating fails to consistently produce supernova explosions having the required characteristics. The authors review the theory of convection and survey some recent calculations indicating the importance of convection operating on millisecond timescales in the protoneutron star. These calculations suggest that such convection is probably generic to the type-2 scenario, that this produces a violet overturn of material below the stalled shock, and that this overturn could lead to significant alterations in the neutrino luminosity and energy. This provides a mechanism that could be effective in reenergizing the stalled shock and producing supernovae explosions having the quantitative characteristics demands by observations. This mechanism implies, in turn, that the convection cannot be adequately described by the 1-dimensional hydrodynamics employed in most simulations. Thus, a full understanding of the supernova mechanism and the resulting heavy element production is likely to require 3-dimensional relativistic hydrodynamics and a comprehensive description of neutrino transport. The prospects for implementing such calculations using a new generation of massively parallel supercomputers and modern scalable algorithms are discussed.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Tennessee Univ., Knoxville, TN (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC05-84OR21400; FG05-87ER40361; FG05-93ER40770
- OSTI ID:
- 231553
- Report Number(s):
- CONF-940161-3; ON: DE96010035; TRN: AHC29611%%107
- Resource Relation:
- Conference: 17. nuclear physics symposium, Oaxtepec (Mexico), 3-7 Jan 1994; Other Information: PBD: [1994]
- Country of Publication:
- United States
- Language:
- English
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