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Title:
How much energy can be stored in a three-dimensional force-free magnetic field?
Authors:
Aly, J. J.
Affiliation:
AA(CEA, Centre d'Études Nucleaires de Saclay, Gif-sur-Yvette, France)
Publication:
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 375, July 10, 1991, p. L61-L64. (ApJL Homepage)
Publication Date:
07/1991
Category:
Solar Physics
Origin:
STI
NASA/STI Keywords:
Force-Free Magnetic Fields, Magnetic Flux, Solar Corona, Solar Flares, Solar Magnetic Field, Half Spaces, Magnetic Field Reconnection, Solar Atmosphere, Stellar Models
DOI:
10.1086/186088
Bibliographic Code:
1991ApJ...375L..61A

Abstract

Simple physical considerations indicate that the energy of any finite-energy, force-free magnetic field occupying a half-space, and having all its lines unknotted and tied to the half-space boundary, will not be larger than the energy of the 'open field' which has the same half-space boundary flux distribution. Attention is given to the consequences of this view for the solar corona's eruptive phenomena; an upper bound on the energy which a flare can release is implied, and any spontaneous transition of the coronal field to an open state is precluded.

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