The ordinary URCA process in the presence of positrons and large magnetic fields

The effect of positron capture on the ordinary URCA neutrino luminosity in a zero magnetic field is investigated for several values of the degeneracy parameter and the range of temperatures 5×10⁸K–5×10¹⁰K. The rate for this process is then compared with those in large magnetic fields (on the order ofH_c =m²c³/eh=4.414×10¹⁰ G). The results indicate that positron capture reduces the effect of large magnetic fields on this process at high temperatures.