## Neutrino flow and stellar core collapse

The results of a detailed numerical calculation of the collapse of the iron core of a 15 solar mass star at the end of its normal evolution are presented. The model discussed is derived from Wilson (1978) with changes in the equation of state, the electron capture model and a complete proper treatment of neutrino degeneracy. The effect of the new equation of state is to allow the collapse to proceed to about twice nuclear density before bounce occurs, and much higher infall velocities are realized. Attention is given to the temperature and entropy of the central zone as functionsmore »