Physics
Scientific paper
Oct 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975georl...2..465s&link_type=abstract
Geophysical Research Letters, vol. 2, Oct. 1975, p. 465-468. NASA-Navy-supported research.
Physics
5
Jupiter Atmosphere, Particle Flux Density, Pioneer 11 Space Probe, Planetary Magnetospheres, Electron Energy, Proton Energy, Radiation Belts
Scientific paper
A significant new finding from analysis of Pioneer 11 observations in the magnetosphere of Jupiter is that there is net streaming of both electrons E above 40 keV and E above 560 keV and protons in the range from .61 to 3.41 MeV away from the planet along high-latitude field lines. This result is compatible with the recent suggestion of Nishida that energetic particles undergo trans-L shell diffusion at low altitudes without significant change of energy. This provides a plausible explanation for the remarkable pitch angle distributions near the equator in the range of L values from 12 to 25; the presence of particles of about 1 MeV energy at the outer edge of the magnetosphere; and hence, via conventional inward diffusion processes, the presence of those having magnetic moments of several hundred MeV per gauss in the inner magnetosphere. The recirculation of energetic particles emerges as an important dynamical feature of the Jovian magnetosphere.-
Goertz Christoph K.
Sentman Davis D.
Van Allen James A.
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