Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...279..136b&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 279, April 1, 1984, p. 136-143. Research supported by the Nederlandse Organ
Astronomy and Astrophysics
Astronomy
36
Galactic Cosmic Rays, Gamma Ray Astronomy, High Energy Interactions, Hydrogen Clouds, Milky Way Galaxy, Radial Distribution, Emissivity, Luminosity, Particle Flux Density
Scientific paper
A method is presented by which the radial distribution of galactic high-energy gamma rays can be determined. It is shown that beyond the solar circle, the gamma ray intensity is proportional to the H I column density alone, and that the emissivity in the 70 MeV-5 GeV energy range is only about 15 percent lower than the local value. The radial distribution of the H I with which the gamma rays are correlated is examined and it is shown that a significant fraction of the gamma ray emission originates at large galactocentric distances, which implies the cosmic rays must be abundant in the outer galaxy.
Blitz Leo
Bloemen Johannes Bernardus Gerhardus Maria
Hermsen Willem
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