Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011astl...37..385m&link_type=abstract
Astronomy Letters, Volume 37, Issue 6, pp.385-402
Astronomy and Astrophysics
Astronomy
Gravitational Collapse, Degenerate Fermi Gas, Neutron Stars, Quasi-One-Dimensional Hydrodynamics, Rotating Collapsar
Scientific paper
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.
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