Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007ssrv..130..153f&link_type=abstract
Space Science Reviews, Volume 130, Issue 1-4, pp. 153-160
Astronomy and Astrophysics
Astrophysics
13
Solar Wind, Stochastic Acceleration, Cosmic Rays
Scientific paper
Observations in the solar wind have revealed important insights into how energetic particles are accelerated in astrophysical plasmas. In circumstances where stochastic acceleration is expected, a suprathermal tail on the distribution function is formed with a common spectral shape: the spectrum is a power law in particle speed with a spectral index of -5. Recent theories for this phenomenon, in which thermodynamic constraints are applied to explain the common spectral shape, are reviewed. As an example of potential extensions of this theoretical work, consideration is given to the acceleration of Anomalous Cosmic Rays in the heliosheath.
Fisk Len A.
Gloeckler George
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