Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996cphe.conf...23f&link_type=abstract
Current perspectives in high energy astropyhsics, p. 23 - 36
Astronomy and Astrophysics
Astronomy
Gamma Rays: Cosmic Rays, Gamma-Ray Background: Gamma-Ray Surveys, Cosmic Rays: Galaxy, Cosmic Rays: Magellanic Clouds
Scientific paper
As the energetic electrons and nuclei, called cosmic rays, travel through the Galaxy, they interact with matter and photons to produce high-energy gamma-rays. These high-energy gamma-rays are very penetrating and can pass through even the central part of the Galaxy with very little attenuation. A study of the Magellanic Clouds has permitted the determination that cosmic rays are galactic and not metagalactic, and therefore that galactic dynamic balance should exist. This fact, combined with a knowledge of the cosmic rays, matter, and photon distributions, permits a prediction of the galactic gamma-ray energy spectrum and the gamma-ray distribution with relatively few adjustable parameters. A comparison of the observed and predicted spatial distributions shows that there is very good agreement between the two. Further, the coupling scale of the cosmic rays and the matter can be determined as well as the normalization for the molecular hydrogen density distribution.
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