Reviews of topical problems

Acceleration of cosmic rays by shock waves

Shafer Institute of Cosmophysical Research and Aeronomy, Siberian Branch of the RAS, 31 Lenin Ave., Yakutsk, 677980, Russian Federation

Theoretical work on various processes by which shock waves accelerate cosmic rays is reviewed. The most efficient of these processes, Fermi acceleration, is singled out for special attention. A linear theory for this process is presented. The results found on the basis of nonlinear models of Fermi acceleration, which incorporate the modification of the structure caused by the accelerated particles, are reported. There is a discussion of various possibilities for explaining the generation of high-energy particles observed in interplanetary and interstellar space on the basis of a Fermi acceleration mechanism. The acceleration by shock waves from supernova explosions is discussed as a possible source of galactic cosmic rays. The most important unresolved questions in the theory of acceleration of charged particles by shock waves are pointed out.

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Fulltext is also available at DOI: 10.1070/PU1988v031n01ABEH002534
PACS: 52.65.Kj, 95.30.Qd, 96.50.Fm, 97.60.Bw, 98.70.Sa (all)
DOI: 10.1070/PU1988v031n01ABEH002534
Citation: Berezhko E G, Krymskii G F "Acceleration of cosmic rays by shock waves" Sov. Phys. Usp. 31 27–51 (1988)
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Оригинал: Бережко Е Г, Крымский Г Ф «Ускорение космических лучей ударными волнами» УФН 154 49–91 (1988); DOI: 10.3367/UFNr.0154.198801b.0049

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