Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1974
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974csgr.conf..229c&link_type=abstract
In ESRO The Context and Status of Gamma Ray Astronomy p 229-239 (SEE N75-25813 16-93)
Astronomy and Astrophysics
Astronomy
Compton Effect, Galactic Radiation, Gamma Rays, Radiation Sources, Angular Distribution, Background Radiation, Cosmic Rays, Emission Spectra, Energy Spectra, Interstellar Gas, Photons, Pions, Spatial Distribution, Spectrum Analysis
Scientific paper
The results of a calculation of the energy and spatial distribution of gamma rays in the bandwidth 100 keV to 300 MeV arising from the various processes in the galaxy are presented. The processes considered are the Compton scattering of the 2.7 K background photons and the starlight by cosmic ray electrons, and also the decay of neutral pions produced in the nuclear interaction of cosmic rays with the interstellar matter. Particular emphasis is given to the strong increase in the density of stellar photons close to the galactic center. This leads to a peaking of the gamma ray fluxes in the direction around the center. The calculated spectral shapes and the angular distributions are in agreement with the available observations in the bandwidth approximately 10 to 100 MeV. The possibility of experimental observation at lower energies is discussed, as are some models proposed for explaining the hard gamma ray emission from our galaxy.
Cowsik Ramanath
Voges Wolfgang
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