Abstract

Suprathermal proton bremsstrahlung (SPB) of energetic protons is an important source of high-energy X-ray and gamma-ray photons in the interstellar medium. We calculate the suprathermal bremsstrahlung radiation power and the associated energy loss rate of the radiating protons. Also the mean photon energy from the SPB process is derived which can be used to construct a monochromatic approximation of the radiation power. The SPB power is the starting point for the quantitative modelling of theoretical SPB radiation spectra in cosmic sources.

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