High-energy electrons in the nonuniform galactic disk model

Abstract

The nonuniform galactic disk model, which we previously proposed to explain the unexpectedly large flux of interstellar antiprotons, is also able to account in a natural way for the spectral shape variation of high-energy cosmic-ray electrons. A comparison of the model prediction with the measured electron data suggests that only about 5% of the observed protons are of local origin and that the electron intensity inside a spiral arm is much lower than that outside it. The model further predicts that the electron energy spectrum should flatten again at very high energies.