On the propagation of cosmic rays in the Galaxy

Details On the propagation of cosmic rays in the Galaxy On the propagation of cosmic rays in the Galaxy

Jun 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...222..471o&link_type=abstract

Astrophysical Journal, Part 1, vol. 222, June 1, 1978, p. 471-483.

Mathematics

Logic

82

Abundance, Astronomical Models, Cosmic Rays, Galactic Structure, Energy Spectra, Galactic Nuclei, Galactic Radio Waves, Interstellar Matter, Milky Way Galaxy, Particle Diffusion

Scientific paper

Cosmic ray propagation in the Galaxy is examined within the framework of the leaky-box model, whereby phenomenological aspects of diffusion and propagation are related to the physical properties of the interstellar medium. The model is parameterized by data on composition, spectra, spectral change as a function of energy, and cosmic ray particle lifetime. It is assumed that electrons and nucleons have a common source within the Galaxy (probably associated with supernova remnants). Lifetime data and leakage length are compared with radio synchrotron and gamma-ray data to establish a place of origin for cosmic rays observed at earth, i.e., at a radius of 0.5-1.0 kpc from earth. It is noted that if the escape length becomes energy independent, all nuclear spectra will flatten, while the electron spectrum remains unchanged.

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