Physics
Scientific paper
Jul 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....90.6287i&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 90, July 1, 1985, p. 6287-6293.
Physics
16
Magnetic Field Configurations, Planetary Magnetic Fields, Planetary Magnetospheres, Space Plasmas, Uranus Atmosphere, Field Strength, Icy Satellites, Plasma Equilibrium, Plasma Pressure, Pressure Effects, Thermal Plasmas, Uranus, Plasma, Magnetic Fields, Magnetosphere, Charged Particles, Sputtering, Satellites, Source, Dynamics, Equilibrium, Pressure, Dipole, Calculations, Thermal Effects, Equatorial Regions, Rings
Scientific paper
There is significant indirect evidence that the planet Uranus possesses a magnetic field. This evidence is based on the observation of hydrogen Lyman alpha emission from Uranus with the aid of the International Ultraviolet Explorer (IUE) spacecraft. The detection of water ice on the Uranian moons led Cheng (1984) to suggest that charged particle sputtering of the icy satellites could provide a significant internal source of oxygen ions and protons to the Uranian magnetosphere. Cheng concluded that this mechanism would predict aurorae around both magnetic poles of Uranus. Cheng's idea of the presence of a continuous internal plasma supply to the Uranian magnetosphere is further pursued in the present investigation. Questions are considered regarding the evolution of Uranus' magnetosphere from a vacuum configuration toward a plasma pressure dominated equilibrium configuration, taking into account the amount of the thermal plasma pressure as a free parameter.
Ip A. K.
Voigt Gerd-Hannes
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