ENERGY OF FORCE-FREE MAGNETIC FIELDS IN RELATION TO CORONAL MASS EJECTIONS
G.S. Choe and C.Z. Cheng
ApJ 574, L179, 2002
The Aly conjecture
“…Aly (1984), who showed that there is an upper bound of magnetic energy of FFFs in an infinite halfspacewith the same boundary normal field (Bn) distribution.Aly (1984) further conjectured that the maximum energy Of the closed FFFs should be the corresponding open-field energy.”
FFFs = force-free fields
Sturrock, P. A., Weber, M., Wheatland, M. S., and Wolfson, R., "Metastable Magnetic Configurations and Their Significance for Solar Eruptive Events,” ApJ 548, 492 (2001).
Hudson, H. S., "Implosions in Coronal Transients," ApJ 531, L75-L77 (2000)
Isomagnetobars
Opened field
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