Distributed reacceleration of cosmic rays

Details Distributed reacceleration of cosmic rays Distributed reacceleration of cosmic rays

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...316..676w&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 316, May 15, 1987, p. 676-690.

Astronomy and Astrophysics

Astrophysics

33

Cosmic Rays, Particle Acceleration, Abundance, Beryllium, Boron, Carbon, Energy Spectra, Primary Cosmic Rays, Secondary Cosmic Rays, Shock Waves

Scientific paper

A model is developed in which cosmic rays, in addition to their initial acceleration by a strong shock, are continuously reaccelerated while propagating through the Galaxy. The equations describing this acceleration scheme are solved analytically and numerically. Solutions for the spectra of primary and secondary cosmic rays are given in a closed analytic form, allowing a rapid search in parameter space for viable propagation models with distributed reeacceleration included. The observed boron-to-carbon ratio can be reproduced by the reacceleration theory over a range of escape parameters, some of them quite different from the standard leaky-box model. It is also shown that even a very modest amount of reacceleration by strong shocks causes the boron-to-carbon ratio to level off at sufficiently high energies.

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