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High-Energy Gamma Rays Probing Cosmic-Ray Spectral Differences thoughout the Galaxy

Bloemen, J. B. G. M.

Detailed spectra of the Galactic γ-ray emission (50 MeV-6 GeV) are derived from a combination of all the observations obtained with the COS-B satellite. These spectra indicate that the cosmic-ray (CR) proton spectrum is on average flatter in the outer Galaxy than in the inner Galaxy and locally by approximately ∝ E^0.4, and maybe more, s…