Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983ssrv...36....3v&link_type=abstract
(International Astronomical Union, Meeting on Galactic Astrophysics and Gamma-Ray Astronomy, Patras, Greece, Aug. 19, 1982) Spac
Astronomy and Astrophysics
Astronomy
31
Galactic Cosmic Rays, Gamma Ray Astronomy, Molecular Clouds, Particle Acceleration, Particle Interactions, Electromagnetic Fields, Interstellar Matter, Shock Waves, Supernovae
Scientific paper
Attention is given to such gamma ray source models as that of supernovae exploding in or near large interstellar clouds in the present consideration of cosmic ray acceleration and transport, with a view to diffuse galactic gamma-ray source applications. Cosmic ray transport in random EM fields is reduced to three cases which suffice for practical purposes. Qualitatively, it is concluded that galactic regions of predominantly molecular hydrogen should be primarily represented by large accreting clouds, and their gamma-ray emissions should by increased by a factor of 2 or even 3 over the standard value. The regions of atomic hydrogen mainly represented by small evaporating clouds have, on average, a depressed gamma-ray emission, though some such clouds may accrete cool gas and thereby become 'gamma-astronomically neutral'.
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