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A kinematic model of a solar flare.Hyder advocated the idea that the optical (H-alpha) flares can be identified with the response of the solar chromosphere to an infalling material stream resulting from the 'disparition brusque' of a prominence. Since some flares are observed without any apparent association with infalling streams, in this paper we examine the possibility of identifying the optical flare with the response of the chromosphere to a supersonic disturbance, i.e., a shock, propagating downward. The undisturbed chromosphere is represented by the Harvard-Smithsonian Reference Atmosphere and the evolution of the shock is evaluated with the use of the CCW (Chisnell, Chester, Whitham) approximation based on the theory of characteristics. It is shown that the chromosphere is heated by the shock, that radiation is enhanced, and that the enhanced radiation terminates the shock around the height of the temperature minimum.
Document ID
19730056688
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Nakagawa, Y.
(High Altitude Observatory Boulder, Colo., United States)
Wu, S. T.
Han, S. M.
(Alabama, University Huntsville, Ala., United States)
Date Acquired
August 7, 2013
Publication Date
May 1, 1973
Publication Information
Publication: Solar Physics
Volume: 30
Subject Category
Space Radiation
Accession Number
73A41490
Funding Number(s)
CONTRACT_GRANT: NAS8-25101
Distribution Limits
Public
Copyright
Other

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