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Alfvenic fluctuations in the solar wind observed by UlyssesOne of the striking results of the Sun's south polar pass by Ulysses was the discovery of large amplitude, long period Alfvenic fluctuations that were continuously present in the solar wind flow from the polar coronal hole. The fluctuations dominate the variances and power spectra at periods greater than or equal to 1 hour and are evident as correlated fluctuations in the magnetic field and solar wind velocity components. Various properties of the fluctuations in the magnetic field, in the velocity, and in the electric field have been established. The waves appear to have important implications for galactic cosmic rays and for the solar wind, topics which have continued to be investigated. Their origin is also under study, specifically whether or not they represent motions of the ends of the field lines at the Sun. The resolution of these issues has benefited from the more recent observations as the spacecraft traveled northward toward the ecliptic and passed into the northern solar hemisphere. All these observations will be presented and their implications will be discussed.
Document ID
19960021403
Acquisition Source
Jet Propulsion Laboratory
Document Type
Conference Paper
Authors
Smith, E. J.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Neugebauer, M
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Tsurutani, B. T.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Balogh, A.
(Imperial Coll. of Science and Technology London, United Kingdom)
McComas, D. J.
(Los Alamos National Lab. NM United States)
Date Acquired
August 17, 2013
Publication Date
June 30, 1995
Publication Information
Publication: International Solar Wind 8 Conference
Subject Category
Solar Physics
Accession Number
96N24799
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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