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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)

Abstract

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.

Keywords

Field Line Solar Corona Coronal Heating Fast Reconnection Toroidal Flux 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Aly, J.J.: 1987a, in “Interstellar Magnetic Fields”, eds. R. Beck and R. Gräve, Springer Verlag, Berlin, p. 240.Google Scholar
  2. Haygyard, M.J., and Rabin, D.M.: 1986, Adv. Space Res. 6, 7.ADSCrossRefGoogle Scholar
  3. Sturrock, P.A.: 1967, in “Plasma Astrophysics”, Enrico Fermi Course XXXIX, Academic Press, New York.Google Scholar
  4. Zvestka, Z.: 1983, Space Sci. Rev. 35, 259ADSCrossRefGoogle Scholar

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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