Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979ap%26ss..63...79l&link_type=abstract
Astrophysics and Space Science, vol. 63, no. 1, June 1979, p. 79-102.
Astronomy and Astrophysics
Astrophysics
Magnetoionics, Magnetostatic Fields, Nonuniform Plasmas, Plasma-Particle Interactions, Ray Tracing, Density Distribution, Energy Transfer, Phase Shift, Plasma Density, Plasma Layers, Shear Layers, Upstream
Scientific paper
The geometrical-optics approximation is used to give the behavior of fast and slow magneto-ionic rays passing through a plasma that possesses a differential shear. Depending upon the orientation of the ambient magnetostatic field with respect to the flow direction, it is shown that the effects of the shear can cause ray paths to propagate upstream or downstream. The fact that in an homogeneous plasma the slow magneto-ionic wave has a group angle which is oppositely directed to its phase angle causes the slow rays to exhibit properties that are extremely curious relative to those obtaining for the fast rays which are themselves interesting. These calculations have been made to show that the effects of velocity shear in an otherwise homogeneous plasma lead to interesting ray behaviors which, presumably, bear upon the more general question of magneto-ionic energy transport in inhomogeneous plasmas.
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