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Nonlinear Alfven waves in high-speed solar wind streamsA nonlinear proton distribution function that is an exact stationary solution of the nonlinear Vlasov equation and Maxwell's equations and which supports a single nonlinear transverse Alfven (ion cyclotron) wave that is circularly polarized and nondispersive is proposed for most of the observations during high-speed solar wind streams. This nonlinear distribution removes the strong Alfven wave instability, inconsistent with the persistence of the observed proton distribution functions in high-speed streams, found by the linear stability analysis. Model temperature anisotropies and drift velocities of the two spatially inhomogeneous bi-Maxwellian components are consistent with typical proton velocity distributions measured in high-speed streams at 1 AU. Two derived relations for each of the wave number and the phase velocity of the wave are obeyed within experimental uncertainties by two typical proton measurements. Our model also predicts that the alpha particle bulk flow velocity exceeds the proton particle bulk flow velocity, as is observed.
Document ID
19770040365
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Abraham-Shrauner, B.
(California, University Los Alamos, N. Mex.; Washington University, St. Louis, Mo., United States)
Feldman, W. C.
(California, University Los Alamos, N. Mex., United States)
Date Acquired
August 8, 2013
Publication Date
February 1, 1977
Publication Information
Publication: Journal of Geophysical Research
Volume: 82
Subject Category
Solar Physics
Accession Number
77A23217
Distribution Limits
Public
Copyright
Other

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