Hydrostatic POST bounce configurations of collapsed rotating iron cores - Neutrino emission

Details Hydrostatic POST bounce configurations of collapsed rotating iron cores - Neutrino emission Hydrostatic POST bounce configurations of collapsed rotating iron cores - Neutrino emission

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...226...69j&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 226, no. 1, Dec. 1989, p. 69-87.

Astronomy and Astrophysics

Astrophysics

37

Gravitational Collapse, Neutrinos, Stellar Cores, Stellar Rotation, Supernova Remnants, Supernovae, Angular Velocity, Iron, Shock Wave Propagation, Velocity Distribution

Scientific paper

The final stages of a series of two-dimensional collapse calculations of a 1.36-solar mass iron core employing different initial rotation profiles are described. It is shown that the resulting angular velocity distributions are highly differential and exhibit a generic functional form. After a number of damped oscillations, the matter stratification outside a central part of the collapsed core can very well be modeled by applying the conditions of rotational equilibrium. The asymmetry of the neutrino emission in the early stages just after shock propagation is investigated. A simple two-beam transport approximation indicates that only minor effects are to be expected with respect to the average neutrino energy. However, it is found that, due to the deformation of the collapsed rotating stellar core, the energy output in neutrinos seen by an observer may vary as much as a factor of 3 with his inclination angle relative to the rotation axis.

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