Atomic Clouds as Distributed Sources for the Io Plasma Torus

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Science  25 Sep 1981:
Vol. 213, Issue 4515, pp. 1493-1495
DOI: 10.1126/science.213.4515.1493


Several recent developments have implications for the neutral particle environment of Jupiter. Very hot sulfur ions have been detected in the Io torus with gyrospeeds comparable to the corotation speed, a phenomenon that would result from a neutral sulfur cloud. Current evidence supports the hypothesis that extensive neutral clouds of oxygen and sulfur exist in the Jupiter magnetosphere and that they are important sources of ions and energy for the Io torus.