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Diffusive shock acceleration - Comparison of a unified shock model to bow shock observationsA comparison is made between recent AMPTE/IRM observations of diffuse ions detected upstream of the earth's bow shock when the interplanetary magnetic field was nearly parallel to the solar wind direction and a known collisionless quasi-parallel shock model. These observations, which provide the proton spectrum for all of velocity space, give a direct measure of the shock acceleration efficiency and show how thermal solar winds are injected into the diffusive shock acceleration mechanism. The model accurately describes the proton spectrum; moreover, it predicts the shock structure, the complete particle spectrum, the relative velocity distributions of different ion species in the down stream region, and the enhancement of heavy ions over protons relative to the unshocked solar wind.
Document ID
19870059338
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Ellison, Donald C.
(Maryland, University, College Park; NASA, Goddard Space Flight Center Greenbelt, United States)
Moebius, Eberhard
(Max-Planck-Institut fuer Physik und Astrophysik Garching, Germany)
Date Acquired
August 13, 2013
Publication Date
July 1, 1987
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 318
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
87A46612
Funding Number(s)
CONTRACT_GRANT: NSF AST-83-17755
Distribution Limits
Public
Copyright
Other

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