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Return Current Instability in Flares

Published online by Cambridge University Press:  27 September 2017

D. Cromwell ,
P. McQuillan  and
J.C. Brown
D. Cromwell
Affiliation:
Dept. of Physics and Astronomy, University of Glasgow, G12 8QW, U.K.
P. McQuillan
Affiliation:
Dept. of Physics and Astronomy, University of Glasgow, G12 8QW, U.K.
J.C. Brown
Affiliation:
Dept. of Physics and Astronomy, University of Glasgow, G12 8QW, U.K.

Abstract

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We consider the problem of ion-acoustic wave generation, and resultant anomalous Joule heating, by a return current driven unstable by a small-area thick-target electron beam in solar flares. We find that, contrary to the usual assumption, the hard X-ray bremsstrahlung emission may actually be enhanced in comparison to conventional thick-target models. This present paper is a summary of the work of Cromwell, McQuillan and Brown (1988).

Type
Session III: Theory
Information
International Astronomical Union Colloquium , Volume 104 , Issue 2: Solar and Stellar Flares , 1989 , pp. 313 - 316
Copyright
Copyright © Kluwer 1989

References

Cromwell, D.. 1987, Ph.D. Thesis, University of Glasgow.Google Scholar
Cromwell, D., McQuillan, P., and Brown, J.C.: 1988, Solar Phys. 115, 289.CrossRefGoogle Scholar
Hoyng, P., Brown, J.C., and van Beck, H.F.: 1976, Solar Phys. 48, 197.Google Scholar
Kiplinger, A.L., Dennis, B.R., Emslie, A.G., Frost, K.J., and Orwig, L.E.: 1983, Ap. J. (Letters), 205, L99.Google Scholar