Neutrino energy loss in stellar interiors

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Energy Dissipation, Neutrinos, Pair Production, Stellar Evolution, Stellar Interiors, Stellar Structure, Bremsstrahlung, Integral Equations

Scientific paper

The energy loss rates due to pair, photo-, and plasma neutrino processes are calculated in the framework of the Weinberg-Salam theory for wide ranges of densities and temperatures. Accurate analytic fitting formulae are presented to facilitate the application of the result. It is found that the present calculation gives a neutrino energy loss rate which is substantially lower than that of Beaudet, Petrosian, and Salpeter. The reduction factor α is in the range 0.35 ⪉ α ⪉ 0.88 depending on the neutrino masses, density, and temperature.

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