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Physics and AstronomyAstrophysics

Force Free Magnetic Fields and Solar Activity.

Authors: P. A. Sturrock; C. W. Barnes; STANFORD UNIV CALIF INST FOR PLASMA RESEARCH
Abstract:
This study, aimed at the prediction of solar flares, centers on devising methods for calculating magnetic field structures in the solar atmosphere. Force-free fields comprise an important class of magnetic-field structures which may be calculated by relaxation techniques. Models under active consideration involve spherical boundary surfaces and cylindrical symmetry. Study of the energy of such field configurations indicates that, for sufficiently large shear, force-free fields will be unstable against perturbations leading to eruption. The condition for this instability and the mechanism of instability have been investigated. The studies are related to erupting prominences and coronal transients, as well as solar flares. (Author)

Description: Final rept. 1 Jul 74-31 Dec 76
Pages: 27
Report Date: DEC 1976
Contract Number: F1962874C0054
Report Number: A449930

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Keywords relating to this report:
Force Mechanics
FREE FIELD
INSTABILITY
MAGNETIC FIELDS
PERTURBATIONS
PREDICTIONS
SOLAR CORONA.
SOLAR FLARES
SOLAR PHYSICS
TRANSIENTS
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