Preliminary Results on the Plasma Environment of Saturn from the Pioneer 11 Plasma Analyzer Experiment

The Ames Research Center Pioneer 11 plasma analyzer experiment provided measurements of the solar wind interaction with Saturn and the character of the plasma environment within Saturn's magnetosphere. It is shown that Saturn has a detached bow shock wave and magnetopause quite similar to those...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 1980-01, Vol.207 (4429), p.403-407
Main Authors: Wolfe, J. H., Mihalov, J. D., Collard, H. R., McKibbin, D. D., Frank, L. A., Intriligator, D. S.
Format: Article
Language:English
Subjects:
Ions
Jupiter
Magnetopause
Magnetosheath
Magnetospheres
Plasmas
Protons
Saturn
Solar wind
Spacecraft
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Summary:The Ames Research Center Pioneer 11 plasma analyzer experiment provided measurements of the solar wind interaction with Saturn and the character of the plasma environment within Saturn's magnetosphere. It is shown that Saturn has a detached bow shock wave and magnetopause quite similar to those at Earth and Jupiter. The scale size of the interaction region for Saturn is roughly one-third that at Jupiter, but Saturn's magnetosphere is equally responsive to changes in the solar wind dynamic pressure. Saturn's outer magnetosphere is inflated, as evidenced by the observation of large fluxes of corotating plasma. It is postulated that Saturn's magnetosphere may undergo a large expansion when the solar wind pressure is greatly diminished by the presence of Jupiter's extended magnetospheric tail when the two planets are approximately aligned along the same solar radial vector.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.207.4429.403