Discrepancy in proton flux extrapolation along field lines in the middle Jovian magnetosphere

Details Discrepancy in proton flux extrapolation along field lines in the middle Jovian magnetosphere Discrepancy in proton flux extrapolation along field lines in the middle Jovian magnetosphere

Jan 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jgr....84...56s&link_type=abstract

Journal of Geophysical Research, vol. 84, Jan. 1, 1979, p. 56-62.

Astronomy and Astrophysics

Astronomy

Jupiter Atmosphere, Pioneer 10 Space Probe, Planetary Magnetic Fields, Planetary Magnetospheres, Proton Flux Density, Atmospheric Models, High Energy Electrons, Magnetic Equator, Planetary Rotation, Spaceborne Astronomy, Protons, Flux, Electrons, Jupiter, Magnetosphere, Modulation, Magnetic Fields, Pioneer 10, Models, Spectrum, Rotation, Period

Scientific paper

An attempt is made to explain the observed modulation of the electron and proton fluxes between 20 and 30 Jupiter radii on the basis of adiabatic theory and assumed symmetry with Jovigraphic longitude. Liouville's theorem is applied 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 is used for determining the positions of the equatorial crossings. Energetic electrons (1.3 MeV) 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 expected by this simple application of Liouville's theorem. Reasons for this discrepancy are offered.

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