Particle acceleration mechanisms

Details Particle acceleration mechanisms Particle acceleration mechanisms

Feb 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apjs...90..515b&link_type=abstract

Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 90, no. 2, p. 515-520

Astronomy and Astrophysics

Astrophysics

24

Electrostatics, Fluid Flow, Particle Acceleration, Radiative Transfer, Stochastic Processes, Energy Spectra, Free Energy, Kinetic Energy, Quasars, Rotational Spectra

Scientific paper

High-energy particle acceleration is observed to proceed in a diverse variety of astrophysical sites ranging from the terrestrial aurorae to the most distant quasars. Particle acceleration is a fairly common channel for the release of large-scale kinetic, rotational, and magnetic energy. Physical mechanisms include electrostatic acceleration, stochastic processes, and diffusive shock energization. Cosmic-ray energy spectra have shapes which reflect escape, collisional, and radiative losses. The overall acceleration efficiency is controlled by the low-energy particle injection which may, in turn, feed back into the energization. Recent observational developments, which illustrate these general principles and raise fresh questions, are briefly summarized.

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