Neutrino diffusion in stellar collapse

Details Neutrino diffusion in stellar collapse Neutrino diffusion in stellar collapse

Jan 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...300..142v&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 300, Jan. 1, 1986, p. 142-150.

Physics

16

Gravitational Collapse, Neutrinos, Particle Diffusion, Stellar Physics, Chemical Composition, Opacity, Scattering, Stellar Evolution, Temperature Gradients

Scientific paper

The diffusion flows of neutrinos in stellar collapse are considered. The neutrino energy and number fluxes are driven by the gradients of temperature and chemical potential, and are characterized by four Rosseland mean free paths. Exact expressions for these Rosseland means are derived, taking scattering and stimulated absorption of the neutrinos into account separately as well as in combination. The Rosseland means for the combined opacities constitute new analytical results. These exact expressions represent an improvement over previously published prescriptions.

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