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Weak, quasiparallel profiles of earth's bow shock - A comparison between numerical simulations and ISEE 3 observations on the far flankOver 200 crossings of the distant downwind flanks of earth's magnetosonic bow shock by ISEE 3 included many cases of weak, or low Mach number, quasi-parallel shocks. A consistent feature of the magnetic field profiles was the presence of large amplitude, near periodic to irregular transverse oscillations downstream from even the weakest Q-parallel shocks. Large downstream perturbations with whistler-like features similar to those of the observations appear in 1D simulations when the Alfven Mach number M(A) is greater than 2.5 but not when M(A) = 2.1. The observed cases with downstream waves also occurred when M(A) is greater than about 2.5, suggesting the importance of the Alfven as opposed to magnetosonic Mach number in determining the signature of weak, Q-parallel shocks.
Document ID
19920036897
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Greenstadt, E. W.
(TRW, Inc. Redondo Beach, CA, United States)
Coroniti, F. V.
(TRW, Inc. Redondo Beach, CA, United States)
Moses, S. L.
(TRW, Inc. Redondo Beach, CA, United States)
Tsurutani, B. T.
(JPL Pasadena, CA, United States)
Omidi, N.
(TRW, Inc. Redondo Beach, CA, United States)
Quest, K. B.
(TRW, Inc. Redondo Beach, CA, United States)
Krauss-Varban, D.
(California, University La Jolla, United States)
Date Acquired
August 15, 2013
Publication Date
December 1, 1991
Publication Information
Publication: Geophysical Research Letters
Volume: 18
ISSN: 0094-8276
Subject Category
Geophysics
Accession Number
92A19521
Funding Number(s)
CONTRACT_GRANT: NASW-4414
CONTRACT_GRANT: NAS5-33046
Distribution Limits
Public
Copyright
Other

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