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Current Sheet Formation in Force-Free Magnetic Fields

  • Gregory Vekstein
  • Eric R. Priest

Abstract

Abstract. The evolution of coronal magnetic fields in response to slow photospheric footpoint motions does not in general produce smooth a force-free eguilibrium. The presence of separatrix lines results in current sheet formation even under an infinitesimal shearing deformation of a 2-D magnetic field. When a separatrix without neutral points is present a regular perturbation approach is valid and preserves the magnetic field geometry. In the case of a neutral X-point perturbation the scheme fails and a geometry with cusped triple points is formed. In general these current sheets could create coronal heating, but when new flux emerges into a highly sheared field it could also trigger a solar flare.

Keywords

Current Sheet Solar Phys Solar Flare Solar Corona Magnetic Configuration 
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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Copyright information

© Springer-Verlag Berlin Heidelberg 1991

Authors and Affiliations

  • Gregory Vekstein
    • 1
  • Eric R. Priest
    • 2
  1. 1.Institute of Nuclear PhysicsNovosibirsk, 90USSR
  2. 2.Mathematical Sciences DepartmentThe UniversitySt.AndrewsScotland

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