Sakurai, T., Two Fundamental MHD Problems in Solar Physics, 369, 587 (2007) (ADS)
(click on the image for a larger version)
A nicely colored view of the Parker
view of footpoint twisting, in a study of the nature of the assumed
boundary motion.
The paper deals with the very interesting problem of whether or not
specific flows can lead to
"super-Aly" energy
storage, ie ones in which purely closed fields can exceed the
non-potential energy content of the maximal open field* state
allowed by the Aly-Sturrock theorem.
The paper does not comment on the related
implosion concept, unfortunately.
The other fundamental problem discussed in the paper is that of the
power-law distribution function of flare events, a subject that has
launched discussions of "Self-Organized Criticality" and cartoons
illustrating stochastic
reconnecting current sheets, for example.
A nicely colored view of the Parker view of footpoint twisting, in a study of the nature of the assumed boundary motion. The paper deals with the very interesting problem of whether or not specific flows can lead to "super-Aly" energy storage, ie ones in which purely closed fields can exceed the non-potential energy content of the maximal open field* state allowed by the Aly-Sturrock theorem. The paper does not comment on the related implosion concept, unfortunately.
The other fundamental problem discussed in the paper is that of the power-law distribution function of flare events, a subject that has launched discussions of "Self-Organized Criticality" and cartoons illustrating stochastic reconnecting current sheets, for example.