Other
Scientific paper
Jun 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jgr....97.8145l&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 97, no. A6, June 1, 1992, p. 8145-8155. Research supported by NSERC.
Other
3
Charged Particles, Jupiter (Planet), Magnetic Anomalies, Particle Acceleration, Planetary Magnetospheres, Astronomical Models, Energetic Particles, Planetary Rotation
Scientific paper
It is shown, through the formulation of a simple theoretical model, that there exists a possibility that a significant number of energetic ions in the Jovian magnetosphere, and presumably in other astrophysical environments beyond direct access, owe their origin to a large-scale longitudinal magnetic anomaly corotating with the central body anchoring the magnetosphere. The proposed acceleration mechanism can explain the observed properties of MeV ions in the Jovian magnetosphere, if the invoked magnetic anomaly has a typical boundary thickness comparable to an ion gyroradius, which for a preheated 10-keV heavy ion in the outer Jovian magnetosphere may be of the order of a few Jovian radii. The energy source for the acceleration is a torque from the central planet arising from a differential rotation between the ionosphere and the magnetosphere. The premise and outstanding issues pertaining to the present proposal are further discussed as motivating points for future studies.
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