Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010apj...720l.127s&link_type=abstract
The Astrophysical Journal Letters, Volume 720, Issue 2, pp. L127-L130 (2010).
Astronomy and Astrophysics
Astronomy
22
Diffusion, Magnetic Fields, Turbulence
Scientific paper
A new nonlinear theory for cosmic-ray scattering across the mean magnetic field is derived. This theory can be applied for arbitrary turbulence geometry. Previous theories such as the extended nonlinear guiding center theory are deduced as special limits. Furthermore, the new theory can explain subdiffusive transport for slab turbulence and the recovery of diffusion for slab/two-dimensional and three-dimensional turbulence. The nonlinear standard theory for field line wandering can be obtained as a special limit.
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