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Thermal and Hall-Current Instabilities in a Current Sheet and the Triggering of two Ribbon Flares

Published online by Cambridge University Press:  12 April 2016

Li Sang Jae
Li Sang Jae*
Affiliation:
Pyongyang Astronomical Observatory, Academy of Sciences, Democratic People’s Republic of Korea

Abstract

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Thermal stability of a current sheet is investigated when the magnetic field is not perfectly anti-parallel at the sheet. If the effect of Hall electric current is taken into account, a new instability (the Hall instability) appears. The result is applied to the activation of dark filaments often seen prior to solar flares. The growth time of the instability is evaluated and found to be consistent with the observed time scale of the filament activation.

Type
Session 2. Theory of Active Region Structure
Information
International Astronomical Union Colloquium , Volume 141: The Magnetic and Velocity Fields of Solar Active Regions , 1993 , pp. 119 - 122
Copyright
Copyright © Astronomical Society of the Pacific 1993

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