Comment [on “System III variations in apparent distance of Io plasma torus from Jupiter”]
نویسندگان
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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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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We present empirical evidence for a radiative cooling time for the Io plasma torus that is about a factor of ten less than presently accepted values. We show that brightness fluctuations of the torus in the extreme ultraviolet (EUV) at one ansa are uncorrelated with the brightness at the other ansa displaced in time by five hours, either later or earlier. Because the time for a volume of plasma...
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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 کاملStability of the Io Plasma Torus/atmosphere Interaction
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: Geophysical Research Letters
سال: 1993
ISSN: 0094-8276
DOI: 10.1029/93gl02428