Quasi-Static Evolution of a Force-Free Magnetic Field — Applications to the Theory of Stellar Flares and Coronal Heating

  • J. J. Aly
Part of the Astrophysics and Space Science Library book series (ASSL, volume 143)


We consider in the highly conducting half-space {z>0} an x-invariant arcade force-free field which is evolving in a quasi-static way as a consequence of a velocity field \({\underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle\thicksim}$}}{v}} = v(y)\hat{x}\) imposed on the boundary plane {z=0}. We show in particular that, when the shear exceeds a critical value, the configuration becomes metastable whith respect to non-linear perturbations which change the topology of the field lines, but preserve the magnetic fluxes.


Field Line Solar Corona Coronal Heating Fast Reconnection Toroidal Flux 
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Copyright information

© Kluwer Academic Publishers 1988

Authors and Affiliations

  • J. J. Aly
    • 1
  1. 1.Service d’AstrophysiqueCEN SaclayGif-sur-Yvette CédexFrance

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