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An Energy Storage Process and Energy Budget of Solar Flares

Published online by Cambridge University Press:  14 August 2015

K. Tanaka ,
Z. Smith  and
M. Dryer
K. Tanaka
Affiliation:
Tokyo Astronomical Observatory, University of Tokyo and Space Environment Laboratory, National Oceanic and Atmospheric Administration, Boulder, respectively
Z. Smith
Affiliation:
Tokyo Astronomical Observatory, University of Tokyo and Space Environment Laboratory, National Oceanic and Atmospheric Administration, Boulder, respectively
M. Dryer
Affiliation:
Tokyo Astronomical Observatory, University of Tokyo and Space Environment Laboratory, National Oceanic and Atmospheric Administration, Boulder, respectively

Extract

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The flare energy is generally considered to be stored in stressed (twisted or sheared) magnetic fields. Origin of the stress may be either intrinsic or due to horizontal shear motion (Tanaka and Nakagawa 1973) or due to propagation of twist from below (Piddington 1974). Characteristic magnetic configurations in the great activities (inverted, twisted δ-configuration; Zirin and Tanaka 1973) suggest an inherent shape of fluxtube for these regions: a twisted magnetic knot. Further, evolutionary characteristics such as rapid growths of spots and growth of twist in parallel with apparent shear motion of spot, together with the fact that the shear motion is associated with upward velocity (Tanaka and LaBonte 1979), suggest a continuous emergence of such a twisted knot from below throughout the activity (Tanaka 1979). In this model (Fig. 1) the flare energy may be supplied directly into the corona as the twisted portion of the fluxtube emerges out. The amount of energy supplied between t0 and t may be equated to the energy contained in the twist (ɸ) between z1 and z2,

Type
Part III. Solar Transient Phenomena Affecting the Corona and Interplanetary Medium: Dynamics Deduced from Observations
Information
Symposium - International Astronomical Union , Volume 91: Solar and Interplanetary Dynamics , 1980 , pp. 231 - 234
Copyright
Copyright © Reidel 1980 

References

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