Diffuse galactic emission of high energy gamma rays

Astronomy and Astrophysics – Astronomy

Scientific paper

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Diffuse Radiation, Galactic Cosmic Rays, Gamma Ray Astronomy, High Energy Interactions, Cos-B Satellite, Energy Spectra, Particle Intensity, Radiation Distribution

Scientific paper

A study of the gamma-radiation produced by the interaction of cosmic rays with the interstellar matter and photons is extended, based on recent COS-B satellite results and background estimates (1982) and evaluations of the 21-cm radiation in the Galaxy. Gamma-ray intensities predicted over the latitude range of -10 to 10 degrees for energy ranges 70-150, 150-300, and 300-5000 MeV agree well with the COS-B longitude distributions. The agreement suggests that the radial distribution of the emission, calculated from the model, is also approximately correct. The energy spectrum is calculated using COS-B and SAS-2 data. Finally, it is noted that contribution by the arms on the far side of the Galaxy for small galactic latitudes (between -0.4 and +0.4 degrees) makes it possible to identify very large far-side molecular clouds.

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