Other
Scientific paper
Aug 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978eostr..59..352s&link_type=abstract
EOS; TRANSACTIONS, AMERICAN GEOPHYSICAL UNION, vol. 59, 352. Article.
Other
Electron Flux Density, Jupiter Atmosphere, Modulation, Planetary Magnetospheres, Proton Flux Density, Adiabatic Conditions, Lines Of Force, Magnetic Fields, Pioneer 10 Space Probe, Trapped Particles
Scientific paper
Fluxes of energetic electrons and protons in Jupiter's outer magnetosphere were observed to be modulated with the 10 hour rotation period of the planet. This modulation was due to the concentration of particles at the magnetic equator: the non-alignment of Jupiter's spin and rotation axes caused Pioneer-10 to oscillate between +20 deg and -19 deg magnetic latitude and hence, between regions of stronger and weaker fluxes. The relationship between electron and proton fluxes observed off the magnetic equator was countered with measurements at the equatorial crossing radii of the same flux tubes by applying Liouville's theorem with the assumption that particles move conserving their magnetic moments. A magnetic model which matches the intensity and direction of the magnetic field along the Pioneer 10 trajectory was used for determining the positions of the equatorial crossings. Energetic electrons compared in this way appear to be consistently described. Protons, on the other hand, show much weaker fluxes at the off-equatorial points than would be predicted by this simple application of Liouville's theorem.
Birmingham Thomas J.
Schardt A. W.
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