Physics – Plasma Physics
Scientific paper
Dec 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995jgr...10023703w&link_type=abstract
Journal of Geophysical Research, Volume 100, Issue A12, p. 23703-23710
Physics
Plasma Physics
16
Space Plasma Physics: Kinetic And Mhd Theory, Magnetospheric Physics: Magnetosphere/Ionosphere Interactions, Magnetospheric Physics: Mhd Waves And Instabilities, Magnetospheric Physics: Numerical Modeling
Scientific paper
We present numerical simulations of wave coupling in a cold, ideal, inhomogeneous plasma waveguide which approximates the flanks of the magnetosphere. Two types of driving conditions are investigated. The first corresponds to a displacement of the magnetopause over a fixed azimuthal range. The pulsations driven by this boundary condition have an azimuthal wavenumber and phase speed determined by the equilibrium structure of the magnetosphere. The second condition corresponds to a displacement pulse which runs antisunward along the magnetopause and produces pulsations with a phase velocity strictly equal to that of the boundary pulse. Our results are compared briefly with data and suggest that on some occasions the magnetosphere is driven in a fashion that is well approximated by a ``running'' pulse or wave on the magnetopause.
Rickard Graham J.
Wright Andrew. N.
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