Local normal galaxies

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May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990nascp3071..245f&link_type=abstract

In its The Energetic Gamma-Ray Experiment Telescope (EGRET) Science Symposium p 245-256 (SEE N90-23294 16-90)

Astronomy and Astrophysics

Astronomy

1

Andromeda Galaxy, Cosmic Rays, Gamma Ray Astronomy, Gamma Rays, Magellanic Clouds, Magnetic Fields, Gamma Ray Observatory, Gamma Ray Telescopes, Synchrotron Radiation, X Ray Telescopes

Scientific paper

In the near future, high energy (E greater than 20 MeV) gamma ray astronomy offers the promise of a new means of examining the closest galaxies. Two and possibly three local galaxies, the Small and Large Magellanic Clouds and M31, should be visible to the high energy gamma ray telescope on the Gamma Ray Observatory, and the first should be seen by GAMMA-1. With the assumptions of adequate cosmic ray production and reasonable magnetic field strengths, both of which should likely be satisfied, specific predictions of the gamma ray emission can be made separating the concepts of the galactic and universal nature of cosmic rays. A study of the synchrotron radiation from the Large Magellanic Cloud (LMC) suggests that the cosmic ray density is similar to that in the local region of our galaxy, but not uniform. It is hoped the measurements will be able to verify this independent of assumptions about the magnetic fields in the LMC.

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