1. Supernova Panel Discussion
Bethe Symposium
June 2, 2006
J. Craig Wheeler
Department of Astronomy
University of Texas at Austin

2. Type Ia
Progenitor evolution: proof of binary, single versus double degenerate, other? SN 2002ic large hydrogen disk…
Smoldering phase: convective circulation, Urca,
Combustion physics: IR spectra show C/O < 1%, inner layers devoid of C/O; compatible with delayed detonation, totally incompatible with published deflagration models
Plume models?
Polarization: outer layers burned beyond C/O, but clumpy?
Young progenitors?
Origin of spectral, light curve diversity,
Drift of progenitors with redshift - dark energy systematics

3. Core Collapse
Polarization - always aspherical, sometimes complex
New physics 3D - spherical accretion shock instability, acoustic instability (dipole oscillation), non-axisymmetric instabilities (spiral wave modes), jets?
Role of rotation and magnetic fields in all this
Magnetorotational Instability - unavoidable, hard to compute, other dynamo processes
Core collapse makes a LOUD NOISE - magnetoacoustic

4. Core Collapse (cont.):
Ordinary core collapse versus gamma-ray bursts (long term energy input)
Neutron stars versus black holes (mass, comp., rotation?)
Magnetars versus pulsars
Hypernovae versus ordinary supernovae
Accretion induced collapse, O/Ne/Mg cores - do they explode promptly (Kitaura et al, 2006)? What about rotation/magnetic effects?
Progenitor evolution - role of rotation and magnetic fields
Type IIb versus Ib versus Ic; winds versus mass transfer

5. Core Collapse (cont.):
Nature of the dim compact remnants in SN 1987A, Cas A
Nature of jets in Cas A, mystery spot in SN 1987A