The diffuse galactic gamma radiation - The Compton contribution and component separation by energy interval and galactic coordinates

Details The diffuse galactic gamma radiation - The Compton contribution and component separation by energy interval and galactic coordinates The diffuse galactic gamma radiation - The Compton contribution and component separation by energy interval and galactic coordinates

Nov 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...250..389k&link_type=abstract

Astrophysical Journal, Part 1, vol. 250, Nov. 1, 1981, p. 389-397.

Astronomy and Astrophysics

Astrophysics

59

Compton Effect, Cosmic Rays, Galactic Radiation, Galactic Structure, Gamma Rays, Particle Interactions, Astronomical Models, Bremsstrahlung, Electron Scattering, Interstellar Matter, Photon Density

Scientific paper

The diffuse high-energy galactic gamma radiation to be expected from cosmic ray interactions with matter and photons is considered with particular emphasis on the contribution of Compton radiation from cosmic ray electrons. The intensity, spectrum and spatial distribution of the expected galactic gamma radiation are estimated based on models of the matter, cosmic ray and photon distributions to take into account the contributions of bremsstrahlung, high-energy cosmic-ray nucleon and interstellar matter interactions as well as Compton interactions between cosmic ray electrons and background photons. Results suggest that the Compton gamma ray contribution from cosmic ray electron interactions with galactic visible and infrared photons is substantially larger than previously believed. Analysis of the energy spectra and latitude dependence of the various sources reveals that the Compton radiation, bremsstrahlung and nuclear cosmic ray-matter interaction radiation should be separable, with Compton radiation dominating at energies from 10 to 100 MeV at galactic latitudes greater than several degrees. Results demonstrate the potential of gamma ray observations in studies of galactic structure, cosmic ray electrons and galactic photon density.

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