Computer Science – Numerical Analysis
Scientific paper
Sep 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975stin...7533990f&link_type=abstract
Unknown
Computer Science
Numerical Analysis
Cosmic Rays, Electron Radiation, Gamma Rays, Bremsstrahlung, Energy Dissipation, Galactic Radiation, Numerical Analysis
Scientific paper
Medium energy (about 10 to 30 MeV) gamma ray astronomy provides information on the product of the galactic electron cosmic ray intensity and the galactic matter to which the electrons are dynamically coupled by the magnetic field. Because high energy (greater than 100 MeV) gamma ray astronomy provides analogous information for the nucleonic cosmic rays and the relevant matter, a comparison between high energy and medium energy gamma ray intensities provides a direct ratio of the cosmic ray electrons and nucleons throughout the galaxy. A calculation of gamma ray production by electron bremsstrahlung shows that: bremsstrahlung energy loss is probably not negligible over the lifetime of the electrons in the galaxy; and the approximate bremsstrahlung calculation often used previously overestimates the gamma ray intensity by about a factor of two. As a specific example, expected medium energy gamma ray intensities are calculated for the spiral arm model.
Bignami Giovanni F.
Cheung Chi-Yee
Fichtel Carl E.
Kniffen Donald A.
Thompson Daniel J.
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