Core-Collapse Supernova Theory, Rotation, and Quasi-Bipolar Explosions

Details Core-Collapse Supernova Theory, Rotation, and Quasi-Bipolar Explosions Core-Collapse Supernova Theory, Rotation, and Quasi-Bipolar Explosions

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aspc..342..184b&link_type=abstract

1604-2004: Supernovae as Cosmological Lighthouses, ASP Conference Series, Vol. 342, Proceedings of the conference held 15-19 Jun

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I review some of the reasons for believing that the generic core-collapse supernova is neutrino-driven, not MHD-jet driven. I include a discussion of the possible role of rotation in supernova blast energetics and morphology, and speculate on the origin of Cas A's and SN 1987A's ejecta fields. Two ``explosive" phenomena may be associated with most core collapses, the neutrino-driven supernova itself and an underenergetic jet-like ejection that follows. The latter may be a magnetic wind that easily penetrates the debris created by the much more energetic supernova. In Cas A I associate this sub-dominant collimated wind with the ``jet/counter-jet" structure observed. I suggest that the actual Cas A explosion itself is at nearly right angles to this jet, along a rotation axis that coincides with the bulk of the ejecta, the iron lobes, and the putative direction of motion of the point source. It may be that when rotation becomes sufficiently rapid the strong-neutrino-driven-supernova/weak-jet duality switches to a strong-MHD-jet scenario that might be associated with hypernovae, and in some cases gamma-ray bursts. Finally, I present a calculation using a new 2D multi-group, flux-limited radiation/hydrodynamics code recently developed for the simulation of core-collapse supernovae.

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