Physics
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsh13c..08j&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #SH13C-08
Physics
2104 Cosmic Rays, 2114 Energetic Particles (7514)
Scientific paper
The effects of viscosity and shear can play a significant role in the heliosphere and have been little studied. We will discuss some of the expected effects that have been published and go on to discuss some recent, new ideas which appear likely to play important roles as we study the heliosphere in greater detail. We find that shear layers may provide significant barriers to charged-particle transport. For example, we find that the heliopause may be a significant barrier to galactic cosmic rays entering the heliosphere. The shear flow near the heliopause should produce both an hancement of the magnetic-field magnitude and reduce field-line mixing or random walk, both of which will reduce transport across the heliiopause. The same effect may reduce the access of galactic cosmic rays. These factors may be closely related to the magnetic wall" discussed by earlier authors in connection with numerical simulations of the heliosphere. We will also discuss some possible effects of shear on particle transport in the inner heliosphere.
Giacalone Joe
Jokipii Randy J.
Kota József
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