Propagation of cosmic-ray primary and secondary electrons in dense interstellar clouds, and implications for gamma-ray production

Details Propagation of cosmic-ray primary and secondary electrons in dense interstellar clouds, and implications for gamma-ray production Propagation of cosmic-ray primary and secondary electrons in dense interstellar clouds, and implications for gamma-ray production

Jul 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977esasp.124..147s&link_type=abstract

In ESA Recent Advan. in Gamma-Ray Astronomy p 147-151 (SEE N78-11899 02-88)

Astronomy and Astrophysics

Astronomy

2

Cosmic Rays, Electron Trajectories, Gamma Rays, Interstellar Gas, Electron Density (Concentration), Magnetohydrodynamic Waves, Molecular Gases

Scientific paper

The movement of primary and secondary electrons into and out of dense molecular clouds is inhibited by resonant Alfven waves generated by cosmic-ray nuclei and by the cosmic-ray electrons themselves. The theory described in an earlier paper is extended to the multi-species case, including the generation of secondary electrons within the clouds. The waves cause the electron density within a cloud to diminish, and this causes a corresponding reduction in the expected flux of bremsstrahlung gamma rays from clouds. The reduction for various values of cloud thickness and external cosmic-ray intensity is given.

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