Globally asymmetric supernova.
Abstract
Asymmetries in type II supernova explosions are the most plausible cause of the high space velocities of radio pulsars. The origin of these asymmetries is unknown. Recent work has stressed the potential importance of local instabilities which occur subsequent to the collapse of the stellar core. By contrast, relatively little attention has been paid to the possibility that substantial asymmetry might already be present during core collapse. The presupernova star supports g-modes in which the core oscillates with respect to the stellar envelope. These modes gain excitation by modulating the release of nuclear energy. Asymmetries associated with these modes could then be amplified during core collapse. The most likely place for this to occur is in the supersonically collapsing outer core.
- Publication:
-
Unsolved Problems in Astrophysics
- Pub Date:
- 1997
- Bibcode:
- 1997upa..conf..269G
- Keywords:
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- Supernovae: Explosions;
- Supernovae: Pulsars;
- Supernovae: Collapsing Stars