Bremsstrahlung emissivity of a proton-electron plasma in a strong magneticfield

A self-consistent calculation of the bremsstrahlung emissivity for a hot op tically thin plasma in a strong external magnetic field is presented. The e missivity is calculated fur a nonthermal electron velocity distribution f(u psilon). Two competing elementary processes are taken into account, i.e., C oulomb scattering and resonant cyclotron emission, which lead to a depopula tion of f(upsilon) above the cyclotron energy. The resulting spectra show a n extremely narrow line feature at the cyclotron frequency. The total brems strahlung emissivity as a function of the plasma temperature and the magnet ic field is also given.