Fast magnetosonic waves launched by transient, current sheet reconnection

D. W. Longcope, E. R. Priest

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)

Abstract

A model is investigated describing the resistive dissipation of a finite, two-dimensional current sheet subject to suddenly enhanced resistivity. The resistivity rapidly diffuses the current to a distance where it couples to fast magnetosonic modes. The current then propagates away as a sheath moving at the local Alfven speed. A current density peak remains at the X-point producing a steady electric field independent of the resistivity. This transfers flux across the separatrix at a rate consistent with the external wave propagation. The majority of the magnetic energy stored by the initial current sheet is converted into kinetic energy, far from the reconnection site, during the fast mode propagation. (c) 2007 American Institute of Physics.

Original languageEnglish
Number of pages11
JournalPhysics of Plasmas
Volume14
DOIs
Publication statusPublished - Dec 2007

Keywords

  • FAST MAGNETIC RECONNECTION
  • CORONAL LOOP OSCILLATIONS
  • NULL POINT
  • NEIGHBORHOOD
  • RESISTIVITY
  • EVOLUTION
  • REGION
  • FIELDS
  • MODEL

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