Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jgr....84...87g&link_type=abstract
Journal of Geophysical Research, vol. 84, Jan. 1, 1979, p. 87-92.
Astronomy and Astrophysics
Astronomy
8
Atmospheric Diffusion, Energy Dissipation, Jupiter Atmosphere, Mathematical Models, Particle Diffusion, Planetary Magnetospheres, Atmospheric Models, Pioneer 10 Space Probe, Pioneer 11 Space Probe, Planetary Ionospheres, Radial Flow, Spaceborne Astronomy
Scientific paper
A mathematical model describing radial diffusion, with violation of the third adiabatic invariant and with local losses, is applied to the Pioneer 10 and 11 observations of omnidirectional integral intensities of electrons with energy exceeding 21 MeV. Local losses outside L = 3 are much stronger than synchrotron losses but weaker than the losses one would expect for strong pitch angle diffusion. If radial diffusion is driven by ionospheric winds, as was suggested by Brice and McDonough (1973), it is found that the theoretical solution which best fits the data requires that the radial diffusion coefficient equals 3 x 10 to the -9th L-cubed/s and the lifetime against local losses is approximately a few million seconds.
Goertz Christoph K.
Thomsen Michelle F.
Van Allen James A.
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