νν-pair and axion productions in strong magnetic field in relativistic quantum approach and cooling of magnetars

초록

We study the νν-pair and axion production from electron and proton, which occurs only under the strong magnetic field. We perform the exact relativistic quantum calculation including the Landau levels and the anomalous magnetic moment. Cooling by νν-pair and axion emission are shown to be much larger than neutrino cooling by the Urca processes. Thus, these processes by the strong magnetic field is expected to contribute very largely to the cooling process of the magnetar. © 2018 Author(s).