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An interplanetary planar magnetic structure oriented at a large (about 80 deg) angle to the Parker spiralMagnetic field structures in the solar wind, characterized by a variation of the field vectors within a plane inclined to the ecliptic ('Planar Magnetic Structures', PMSs), were reported recently (Nakagawa et al., 1989). These PMSs have the property that the plane of variation of the field also contains the nominal Parker spiral direction. An observation of a PMS where the direction of the line of intersection of the plane of field variation with the ecliptic plane makes a large (about 80 deg) angle to the Parker spiral direction is presented. Furthermore, the angular variables of the field (1) vary over a restricted range, and (2) are linearly related. The latter property is related to the former. Currently proposed models for the origin of PMS, inasmuch as they require field configurations which retain strict alignment with the Parker spiral direction from formation to observation, are probably incomplete.
Document ID
19900054402
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Farrugia, M. W.
(Imperial Coll. of Science and Technology London, United Kingdom)
Dunlop, M. W.
(Imperial Coll. of Science and Technology London, United Kingdom)
Geurts, F.
(Imperial Coll. of Science and Technology London, United Kingdom)
Balogh, A.
(Imperial Coll. of Science and Technology London, United Kingdom)
Southwood, D. J.
(Imperial College of Science, Technology, and Medicine London, United Kingdom)
Bryant, D. A.
(SERC Rutherford Appleton Laboratory, Didcot, United Kingdom)
Neugebauer, M.
(JPL Pasadena, CA, United States)
Date Acquired
August 14, 2013
Publication Date
July 1, 1990
Publication Information
Publication: Geophysical Research Letters
Volume: 17
ISSN: 0094-8276
Subject Category
Solar Physics
Accession Number
90A41457
Distribution Limits
Public
Copyright
Other

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