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Parallel inhomogeneity and the Alfven resonance. 1: Open field linesIn light of a recent demonstration of the general nonexistence of a singularity at the Alfven resonance in cold, ideal, linearized magnetohydrodynamics, we examine the effect of a small density gradient parallel to uniform, open ambient magnetic field lines. To lowest order, energy deposition is quantitatively unaffected but occurs continuously over a thickened layer. This effect is illustrated in a numerical analysis of a plasma sheet boundary layer model with perfectly absorbing boundary conditions. Consequences of the results are discussed, both for the open field line approximation and for the ensuing closed field line analysis.
Document ID
19950037038
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Hansen, P. J.
(University of Iowa, Iowa City, IA United States)
Harrold, B. G.
(University of Iowa, Iowa City, IA United States)
Date Acquired
August 16, 2013
Publication Date
February 1, 1994
Publication Information
Publication: Journal of Geophysical Research
Volume: 99
Issue: A2
ISSN: 0148-0227
Subject Category
Geophysics
Funding Number(s)
CONTRACT_GRANT: NAGW-970
Distribution Limits
Public
Copyright
Other
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