Abstract
view Abstract Citations (41) References (25) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The radial distribution of galactic gamma-rays. I - Emissivity and extent in the outer galaxy Bloemen, J. B. G. M. ; Blitz, L. ; Hermsen, W. Abstract 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. Publication: The Astrophysical Journal Pub Date: April 1984 DOI: 10.1086/161873 Bibcode: 1984ApJ...279..136B Keywords: Galactic Cosmic Rays; Gamma Ray Astronomy; High Energy Interactions; Hydrogen Clouds; Milky Way Galaxy; Radial Distribution; Emissivity; Luminosity; Particle Flux Density; Space Radiation full text sources ADS |
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