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Shock drift mechanism for Forbush decreasesConsideration is given to the way in which Forbush decreases can arise from variable drifts in nonuniform shocks, where the variation in shock strength along the shock front causes both the shock drift distance and the energy gain to become variable. More particles can then be transported out of a given region of space and energy interval than were transported in, so a spacecraft passing through this region can observe a Forbush decrease in this energy interval despite shock energization and compression. A simple example of how this can occur is presented.
Document ID
19900037858
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Cheng, Andrew F.
(Johns Hopkins University Laurel, MD, United States)
Sarris, E. T.
(Thrace, Democritus University Xanthe, Greece; Johns Hopkins University, Laurel, MD, United States)
Dodopoulos, C.
(Thrace, Democritus University Xanthe, Greece)
Date Acquired
August 14, 2013
Publication Date
February 10, 1990
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 350
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
90A24913
Funding Number(s)
CONTRACT_GRANT: N00039-87-C-5301
CONTRACT_GRANT: NSF ATM-86-11354
Distribution Limits
Public
Copyright
Other

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