Physics
Scientific paper
Dec 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975georl...2..567d&link_type=abstract
Geophysical Research Letters, vol. 2, Dec. 1975, p. 567-570.
Physics
16
Jupiter Atmosphere, Multipolar Fields, Planetary Magnetic Fields, Planetary Magnetospheres, Plasma Density, Density Distribution, Diurnal Variations, Interplanetary Magnetic Fields, Magnetic Flux, Mass Distribution, Trapped Particles
Scientific paper
The longitudinal asymmetry of the surface magnetic-field strength at Jupiter causes a longitudinal asymmetry in the equatorial plasma mass density within the Jovian magnetosphere. The rotation of these density variations with the planet causes a diurnal variation of the radial distance on the night side at which the centrifugal stress of the magnetospheric plasma exceeds the local magnetic-field tension. This is approximately the distance at which the magnetic field opens to interplanetary space; we estimate that the opening distance can vary by as much as 14% as a result of the observed surface field asymmetry. Such a diurnal variation of the boundary of the particle trapping region can account for the observed ten-hour modulation of relativistic electrons emitted from Jupiter into interplanetary space.
Dessler A. J.
Hill Thomas W.
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