Annihilation Process of Neutrino Production in Stars

The rate at which the energy of a blackbody radiation is converted into neutrinos by the pair annihilation process e^-+e⁺→ν+ν has been calculated. At T~6×10⁹^∘K the relaxation time for such conversion process is around 100 sec for pure radiation. Since neutrinos have a very long mean free path ({}stellar dimensions) they will escape, thus carrying away the energy. This process therefore will be of astrophysical importance. The rate of energy loss dU/dt is tabulated, as a function of temperature and density, together with the chemical potential, the pressure, and the electron-positron energy. This table should be useful for numerical integrations of stellar structure equations in the temperature range (0.5-10)×{}10⁹ ^∘{}K, and the density range 0-10⁹ g/cm³.