Other
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21741001m&link_type=abstract
American Astronomical Society, AAS Meeting #217, #410.01; Bulletin of the American Astronomical Society, Vol. 43, 2011
Other
Scientific paper
Core-collapse supernovae are some of the most energetic events in the Universe; they herald the birth of neutron stars and black holes, are a major site for nucleosynthesis, influence galactic hydrodynamics, trigger further star formation, and are prodigious emitters of neutrinos and gravitational waves. As such, it is important to understand the mechanism of explosion. Yet, the details of the mechanism have remained elusive for many decades. For nearly four decades, the preferred mechanism for successful explosions has been the delayed-neutrino mechanism, in which a neutrino luminosity of a few times 1052 erg/s revives the failed shock wave. While 1D radiation-hydrodynamic simulations fail to produce explosions, 2D simulations show promise. We investigated the conditions and criteria necessary for supernova explosions by the neutrino mechanism and found that the critical neutrino luminosity for explosion for 2D simulations is 70% of the critical luminosity for 1D simulations. Our initial investigations suggested that understanding the role of convection and other nonradial instabilities would be key to explaining the reduction in the critical luminosity. Adapting recent developments in turbulence theory to the specific context of core collapse, we are developing a model for core-collapse explosions that explains the reduction in the critical luminosity.
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