Solar Physics

, Volume 145, Issue 1, pp 111–118 | Cite as

Current convection in solar active regions

  • V. P. Meytlis
  • H. R. Strauss
Article

Abstract

Current carrying magnetic fields which penetrate sunspots can be unstable to current convective modes caused by the large gradient of electrical conductivity. The linear growth rates and wavelengths of the unstable modes are found. The unstable modes produce fine-scale vortices perpendicular to the magnetic field, which overshoot well into the solar corona. The modes provide a turbulent vorticity source at the photospheric footpoints of the field. This can cause braiding and reconnection of the coronal magnetic field. The modes twist the coronal magnetic field into loops with a typical radius of 200 km, consistent with recent X-ray observations.

Keywords

Magnetic Field Vortex Convection Electrical Conductivity Vorticity 

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Copyright information

© Kluwer Academic Publishers 1993

Authors and Affiliations

  • V. P. Meytlis
    • 1
  • H. R. Strauss
    • 1
  1. 1.Courant Institute of Mathematical SciencesNew York UniversityNew YorkUSA

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