Auroral hiss observed near the Io plasma torus
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چکیده
منابع مشابه
Periodicities in the Io plasma torus
We present a 6-month basehne of spattally resolved measurements of the Io plasma torus intensity and perpendicular ion temperature which we use to determine the periodicities of the torus during this time. We find large anticorrelated variations in the intensity and ion temperature which are periodic with the Jovian rotation rate (System III). The intensity variations are found to be a simple m...
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The spectrum of the Io plasma torus in the range 905–1187 Å was recorded at 0.26 Å resolution by the Far Ultraviolet Spectroscopic Explorer (FUSE ) on 2001 January 14. Five orbits of data were obtained with the west ansa of the torus centered and tracked in the 30 × 30 apertures of the FUSE spectrographs for a total observation time of 9740 seconds. This region of the spectrum is dominated by t...
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Jupiter was discovered to be a source of high speed dust particles by the Ulysses spacecraft in 1992. These dust particles originate from the volcanic plumes on Io. They collect electrostatic charges from the plasma environment, gain energy from the co-rotating electric field of the magnetosphere, and leave Jupiter with escape speeds over 200 kms. The dust streams were also observed by the Gali...
متن کاملSpatial Distribution of Plasma in the Io Torus
In situ measurements of ion densities and temperatures have been analyzed to produce profiles of these plasma parameters along the Voyager 1 inbound trajectory between 7 and 5 R j. The temperature profile shows a sharp decrease by a factor of •,,50 between 5.8 and 5.2Rj corresponding to a temperature gradient of •,7 x l0 s per R r The electron density profile, inferred from the ion density meas...
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The stability of the Io plasma toms-atmosphere interaction is examined. A simple plasma deflection model describes how transients in the plasma flux and the content of the atmosphere affect the ionospheric conductance, limiting the plasma bombardment and, hence, the supply of atmospheric species to the toms. The supply of the toms is seen to be determined by the thermal structure of the plasma,...
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ژورنال
عنوان ژورنال: Nature
سال: 1979
ISSN: 0028-0836,1476-4687
DOI: 10.1038/280767a0