Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977izssr..41q.322d&link_type=abstract
(Mezhdunarodnyi Seminar po Aktivnym Protsessam na Solntse i Probleme Solnechnykh Neitrino, 8th, Leningrad, USSR, Sept. 25-27, 19
Astronomy and Astrophysics
Astronomy
Energy Dissipation, Jupiter Atmosphere, Magnetohydrodynamic Waves, Particle Acceleration, Planetary Magnetospheres, Solar Activity Effects, Astronomical Models, Particle Flux Density, Power Spectra, Solar Wind
Scientific paper
An attempt is made to determine the power expended in particle acceleration by MHD waves generated in the magnetosphere of Jupiter by the planet itself. A two-zone model is adopted for the Jovian magnetosphere, and the planet is modeled as an oblique dipole. Energy losses to MHD waves are investigated, the form of the MHD-wave spectrum is determined, and nonrelativistic-particle acceleration by MHD waves in the Jovian magnetosphere is analyzed for the case of a Maxwellian particle distribution. The effect of variations in solar-wind parameters due to solar activity on the present acceleration mechanism is considered. It is concluded that such variations should reduce the size of the Jovian magnetosphere, which would entail changes of roughly 50% in the accelerated-particle energy flux from Jupiter.
Dolginov Arkady Z.
Urpin Vadim A.
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