On neutrino thermal conduction and viscosity in stellar collapse

Details On neutrino thermal conduction and viscosity in stellar collapse On neutrino thermal conduction and viscosity in stellar collapse

Dec 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...251l..97v&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 251, Dec. 15, 1981, p. L97-L100. Research supported by the Netherlan

Astronomy and Astrophysics

Astrophysics

19

Gravitational Collapse, Neutrinos, Stellar Structure, Thermal Conductivity, Conductive Heat Transfer, Degenerate Matter, Energy Dissipation, Kinetic Theory, Transport Properties, Viscosity, Viscous Damping

Scientific paper

It is pointed out that Weinberg's formulas (1971) for heat conduction and viscosity, as adapted by several authors to contain the degenerate neutrino energy density, do not properly account for dissipative phenomena in stellar collapse. It appears that the transport coefficients are not simply proportional to the neutrino energy density, owing to the energy dependence of the weak-interaction cross section. By using the correct expressions, it follows that the relative importance of viscous dissipation is much greater than has been previously claimed.

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