Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...203..268h&link_type=abstract
Astrophysical Journal, vol. 203, Jan. 1, 1976, pt. 1, p. 268-271, 273-278.
Astronomy and Astrophysics
Astrophysics
1
Io, Magnetohydrodynamic Turbulence, Turbulent Diffusion, Angular Distribution, Astronomical Models, Atmospheric Models, Electric Fields, Electron Flux Density, Jupiter (Planet), Kelvin-Helmholtz Instability, Magnetospheric Instability, Particle Diffusion, Particle Energy, Proton Flux Density, Trapped Particles
Scientific paper
A local, turbulent diffusion process which may rapidly refill the partial cavity of energetic particles created by Io's passage through a flux tube is discussed. A model is developed of Io's sweeping action on energetic particles in which a wake is formed behind the flux tube threading Io. It is shown to be possible that this wake contains an excess of positive charge, thereby creating an electric field. The particle drift produced by this field, coupled with the density gradient of energetic protons, can generate an instability. It is this instability that is responsible for the turbulent diffusion process. The sweeping of energetic particles is also discussed in relation to particle energy and pitch angle distribution.
Huba Joseph D.
Wu Shang-Chen
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