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A large-amplitude rotational wave in the Venusian ionosheathResults are reported of a preliminary analysis of a large-amplitude rotational wave in the Venusian ionosheath. The results are based on an analysis of the Pioneer Venus Orbiter plasma and magnetic field observations from six orbits in the first (1979) tail season. This wave appears to be the standing super-Alfvenic wing. It is located within the shocked plasma flow outside the boundary of the tail. The rotation of the magnetic field by about 90 deg across the wave occurs through several successive cycles making the wave similar to the group velocity wing consisting of phase velocity waves. The transition through the wave is accompanied by the vector change of the plasma velocity with the magnitude of the plasma velocity jump comparable to the vector jump of the Alfven velocity. The observed super-Alfvenic wing appears to originate upstream and closer to the planet, possibly near the upper boundary of the magnetic barrier on the dayside.
Document ID
19910036389
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Fedorov, A. O.
(Institute of Space Research Moscow, Ussr)
Vaisberg, O. L.
(Institute of Space Research Moscow, Ussr)
Sagdeev, R. Z.
(Institute of Space Research Moscow, Ussr)
Galeev, A. A.
(AN SSSR Institut Kosmicheskikh Issledovanii, Moscow, Ussr)
Intriligator, D. S.
(Carmel Research Center Santa Monica, CA, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1991
Publication Information
Publication: Journal of Geophysical Research
Volume: 96
ISSN: 0148-0227
Subject Category
Lunar And Planetary Exploration
Accession Number
91A21012
Funding Number(s)
CONTRACT_GRANT: NAS2-12313
CONTRACT_GRANT: NAS2-12912
Distribution Limits
Public
Copyright
Other

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