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Science 11 January 1980:
Vol. 207. no. 4427, pp. 181 - 183
DOI: 10.1126/science.207.4427.181
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Articles

Images of Jupiter's Sulfur Ring

CARL B. PILCHER 1

1 Institute for Astronomy, University of Hawaii, Honolulu 96822

Images of the ring of singly ionized sulfur encircling Jupiter obtained on two successive nights in April 1979 show that the ring characteristics may change dramatically in sim 24 hours. On the first night the ring was narrow and confined to the magnetic equator inside Io's orbit. On the second it was confined symmetrically about the centrifugal symmetry surface and showed considerable radial structure, including a "fan" extending to Io's orbit. Many of the differences in the ring on the two nights can be explained in terms of differences in sulfur plasma temperature.

Submitted on August 9, 1979
Revised on October 12, 1979

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Science. ISSN 0036-8075 (print), 1095-9203 (online)