Homologous collapse and deleptonization of an evolved stellar core

Details Homologous collapse and deleptonization of an evolved stellar core Homologous collapse and deleptonization of an evolved stellar core

Oct 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...261..661b&link_type=abstract

Astrophysical Journal, Part 1, vol. 261, Oct. 15, 1982, p. 661-676.

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25

Gravitational Collapse, Neutron Stars, Nuclear Fusion, Stellar Evolution, Supernovae, Cores, Hydrodynamic Equations, Neutrinos, Stellar Mass Ejection, Stellar Models

Scientific paper

One-zone calculations of deleptonization during stellar collapse are reported using the Lamb, et al (1978, 1981) equation of state and electron capture rates, incorporating neutron shell blockage and neutrino trapping. With a simple neutrino leakage scheme, a high final lepton fraction, of 0.37 is found, and the formation of a large homologous core and strong shock is predicted. Other recent hydrodynamic calculations are compared critically with those presented and reasons are suggested as to why they failed to produce a supernova explosion. The onset of homologous collapse in a many-zone hydrodynamic calculation is also demonstrated, and, following Bethe et al., (1979), it is suggested that the one-zone calculation gives a good description of the evolution of the edge of the homologous core.

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