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Record 76 of 2176
Diffusive shock acceleration - Comparison of a unified shock model to bow shock observations
External Online Source: doi:10.1086/165384
Author and Affiliation:
Ellison, Donald C.(Maryland, University, College Park, NASA, Goddard Space Flight Center)
Moebius, Eberhard(Max-Planck-Institut fuer Physik und Astrophysik, Garching, Germany)
Abstract: A 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.
Publication Date: Jul 01, 1987
Document ID:
19870059338
(Acquired Nov 28, 1995)
Accession Number: 87A46612
Subject Category: ASTROPHYSICS
Document Type: Journal Article
Publication Information: Astrophysical Journal, Part 1 (ISSN 0004-637X); 318; 474-484
Publisher Information: United States
Contract/Grant/Task Num: NSF AST-83-17755
Financial Sponsor: NASA; United States
Organization Source: Maryland Univ.; College Park, MD, United States
NASA Goddard Space Flight Center; Greenbelt, MD, United States
Max-Planck-Inst. fuer Physik und Astrophysik; Garching, Germany
Description: 11p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: BOW WAVES; MAGNETOSPHERIC ION DENSITY; PARTICLE ACCELERATION; PARTICLE DIFFUSION; SHOCK WAVES; AMPTE (SATELLITES); COLLISIONLESS PLASMAS; INTERPLANETARY MAGNETIC FIELDS; SOLAR WIND; SPECTRAL ENERGY DISTRIBUTION
Imprint And Other Notes: Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 318, July 1, 1987, p. 474-484. NASA-supported research.
Miscellaneous Notes: NASA-supported research
Availability Source: Other Sources
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