Physics
Scientific paper
Jun 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....90.5153c&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 90, June 1, 1985, p. 5153-5157.
Physics
29
Auroral Arcs, Earth Magnetosphere, Polar Caps, Space Plasmas, Configurations, Convective Flow, Electric Fields, Interplanetary Magnetic Fields, Magnetosheath, Plasma Layers
Scientific paper
A model of oval and polar cap arc configurations has been formulated by combining the theory of antiparallel magnetic merging and theories of the evening discrete arc and of the morningside arc systems. Aside from incorporating the verified and yet-to-be-verified predictions of the individual component theories this unified model leads to definite predictions of not only arc configurations but also characteristics of the plasmas that produce the various types of arcs. The model predicts two types of polar cap arcs characterized by the plasma sources: the magnetosheath arc and the plasma sheet arc. Their occurrence should be governed by the By component of the interplanetary magnetic field, and the same type should not occur simultaneously in both hemispheres.
Chiu Yam T.
Crooker Nancy U.
Gorney David J.
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