Energetic protons in the Jovian magnetosphere

Details Energetic protons in the Jovian magnetosphere Energetic protons in the Jovian magnetosphere

Jan 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979stin...7918867m&link_type=abstract

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Computer Science

Jupiter Atmosphere, Planetary Magnetospheres, Protons, Angular Distribution, Data Acquisition, Energy Spectra

Scientific paper

The time histories, angular distributions and energy spectra of energetic protons were measured over an energy range extending from 0.2 - 20 MeV for the four passes of Pioneers 10 and 11 through the Jovian magnetosphere. Azimuthal asymmetries appear to dominate with time variations also contributing to the very complex topology. On the inbound P-10 pass the expected corotation anisotropy was not observed in the outer magnetosphere supporting the probable existence of a planetary wind in this region. Near the dawn meredian particle streaming away from the planet begins at about 15 RJ. On both the P-10 inbound and P-11 outbound passes, there are regions where only partial corotation is achieved. In the mid-magnetosphere, field-aligned streaming away from the near-equatorial current sheet region is the most prominent feature. At mid-latitudes in the subsolar regime, the streaming pattern is more chaotic and its magnitude is smaller. Qualitative discussions are presented for a number of possible mechanisms which could produce this streaming.

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