The diffusion model of cosmic-ray propagation. I - The source spectrum of the galactic cosmic-ray electrons

Details The diffusion model of cosmic-ray propagation. I - The source spectrum of the galactic cosmic-ray electrons The diffusion model of cosmic-ray propagation. I - The source spectrum of the galactic cosmic-ray electrons

Mar 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979ap%26ss..61....3c&link_type=abstract

Astrophysics and Space Science, vol. 61, no. 1, Mar. 1979, p. 3-17.

Astronomy and Astrophysics

Astrophysics

2

Cosmic Rays, Diffusion Theory, Electron Flux Density, Galactic Nuclei, Supernova Remnants, Synchrotron Radiation, Diffusion Coefficient, Electron Density (Concentration), Gamma Rays, Halos, Interstellar Magnetic Fields, Proton Density (Concentration), Radio Spectra, Spatial Distribution

Scientific paper

A model is developed which indicates that the intrinsic break around 2 GeV in the source spectrum of cosmic-ray electrons, which is required to explain galactic synchrotron emission, can be accounted for by considering electron energy losses by synchrotron radiation in a supernova magnetic field before the electrons leave the remnant. This model is shown to be in agreement with the observed radio spectrum of Cas A and the decay rate of its flux density. Diffusion equations for the nuclear and electron components of cosmic rays are then formulated and solved. The solution for the nuclear component is used to calculate the ratio of light to medium cosmic-ray nuclei and the gamma-ray intensity distribution in the Galaxy. The electron spectrum, its spatial distribution, and the galactic synchrotron-emission distribution are computed on the basis of the solution obtained for the electron component.

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