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

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

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

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

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