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Formation of the wave compressional boundary in the earth's foreshockUsing an evolutionary model and allowing for nonuniform proton injection and wave growth rates, the compressional wave boundaries corresponding to IMF inclinations to the solar wind of theta(BV) equal to 45 and 25 deg were located. The compressional boundaries deduced from this model were found to support the results of Greenstadt and Baum (1986) who have concluded that the observed compressional boundaries are incompatible with wave growth at a fixed growth rate, due to the interaction of a uniform beam with the solar wind. The results indicate, however, that the compressional boundaries are quite compatible with nonuniform beams and growth rates which result from the coupled evolution of the energetic protons and the waves with which they interact. It was found that, in the solar wind frame, the dominant wave-particle interaction in the outer foreshock is the damping of inward propagating (toward the shock) left-polarized waves, producing a magnetically quiet region immediately downstream of the foreshock boundary.
Document ID
19890024139
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Skadron, George
(Illinois State Univ. Normal, IL, United States)
Holdaway, Robert D.
(Illinois State University Normal, United States)
Lee, Martin A.
(New Hampshire, University Durham, United States)
Date Acquired
August 13, 2013
Publication Date
October 1, 1988
Publication Information
Publication: Journal of Geophysical Research
Volume: 93
ISSN: 0148-0227
Subject Category
Geophysics
Accession Number
89A11510
Funding Number(s)
CONTRACT_GRANT: NSF ATM-84-1260
CONTRACT_GRANT: NSF ATM-85-13363
CONTRACT_GRANT: NAGW-76
Distribution Limits
Public
Copyright
Other

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