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The False Equilibrium of a Force-Free Magnetic Field

Published online by Cambridge University Press:  14 August 2015

B. C. Low
B. C. Low*
Affiliation:
Lau Kuei Huat (S) Pte. Ltd., 55 Shipyard Road, Singapore 22 Republic of Singapore

Abstract

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It has been a customary assumption that any force-free magnetic field represents an equilibrium field in the solar atmosphere under the extreme condition 8πp/B2 ≪ 1. An example of a force-free magnetic field is presented for which this assumption fails in the sense that no equilibrium is possible for the magnetic field if imposed with an arbitrary ambient pressure, however weak the pressure is. A simple mechanism is proposed for the onset of eruption in the course of otherwise quasi-static evolution of magnetic fields in the solar atmosphere.

Type
Part IV. Solar Transient Phenomena Affecting the Corona and Interplanetary Medium: - Theoretical Considerations
Information
Symposium - International Astronomical Union , Volume 91: Solar and Interplanetary Dynamics , 1980 , pp. 283 - 289
Copyright
Copyright © Reidel 1980 

References

Gold, T. and Hoyle, J., 1960, M.N.R.A.S. 120, 7.Google Scholar
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Low, B. C., 1979, Astrophys. J. (submitted).Google Scholar