Core Collapse Supernovae: Modeling Requirements and Surprises

摘要

Past modeling efforts have illuminated that core collapse supernovae may be neutrino driven, MHD driven, or both, but uncertainties in the current models prevent us from being able to answer even this most basic question. Certain, however, is the need for multifrequency, and ultimately multifrequency and multiangle, neutrino transport. Moreover, terms in the neutrino transport equations that describe "observer corrections," such as angular aberration and frequency shift, are critical and cannot be neglected, and for massless neutrinos, global conservation of both lepton number and lab-frame specific neutrino energy must be maintained. Recent simulations in three dimensions of the stationary accretion shock instability (SASI) have also clearly demonstrated that two-dimensional models, constrained by axisymmetry, are limited and that three dimensional simulations will yield many surprises, some of them quite remarkable.