The Effect of Iron Core Structure on Supernovae
Abstract
The effects of the initial models on the outcome of stellar collapse calculations are studied. Constructing initial models which satisfy constraints taken from the results of presupernova evolution calculations, the basic criterion that any initial model must satisfy is discussed. Nonequilibrium transport of all flavors of neutrinos and antineutrinos are included as well as the effects of neutrino electron scattering. Conservative choices are made for the equation of state at high density. Cold initial cores significantly reduce the amount of electron capture on infall, leading to strong shock waves. There appears to be an optimum iron core mass, and reducing the mass below this optimum leads to increased lepton loss on infall and subsequent deleterious effects on the shock wave. Successful explosions are obtained with iron cores of 1.12 solar mass when they have the proper characteristics.
 Publication:

The Astrophysical Journal
 Pub Date:
 April 1990
 DOI:
 10.1086/168649
 Bibcode:
 1990ApJ...353..597B
 Keywords:

 Gravitational Collapse;
 Stellar Cores;
 Stellar Interiors;
 Stellar Models;
 Supernovae;
 Equations Of State;
 Hydrodynamic Equations;
 Iron;
 Astrophysics;
 DENSE MATTER;
 EQUATION OF STATE;
 NEUTRINOS;
 STARS: INTERIORS;
 STARS: SUPERNOVAE