Gravitational collapse of a rotating iron stellar core: A model with Fermi-Dirac neutron degeneracy

The effect of Fermi-Dirac neutron degeneracy on the collapse process is studied. Two computations of a spherically symmetric quasi-one-dimensional model are considered: the case with a full allowance for neutrino deposition and the case with total transparency of the star to neutrino emission. The hindering character of neutron degeneracy with respect to collapse has been revealed quantitatively. A weak sensitivity of both thermodynamics and neutrino characteristics of a rotating collapsar to this effect has been established. However, the hydrostatically equilibrium neutron star obtained is composed of a strongly degenerate neutron gas by more than half. This undoubtedly confirms that the performed computations of a quasi-one-dimensional model with neutron degeneracy are topical.