Effect of photospheric twisting motions on a confined toroidal loop

CL Gerrard, Alan William Hood, DS Brown

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

In this paper we investigate the effect of twisting motions at the photosphere on a curved loop confined by overlying field lines. We find that the twisting motions form a twisted loop along which a current builds up. However, the toroidal curvature of the loop appears to have a stabilising effect as there is no sign of the kink instability for a twist of 3.4 pi whereas in a straight cylinder for the same twist profile the critical twist is approximately 2.5 pi. When we include resistivity in the simulation there are indications that reconnection occurs and releases a substantial proportion of the free magnetic energy.

Original languageEnglish
Pages (from-to)79-94
Number of pages16
JournalSolar Physics
Volume222
DOIs
Publication statusPublished - Jul 2004

Keywords

  • MAGNETIC-FLUX TUBES
  • TIED CORONAL LOOPS
  • KINK INSTABILITY
  • NUMERICAL SIMULATIONS
  • MASS EJECTIONS
  • SOLAR-FLARES
  • EVOLUTION
  • RECONNECTION
  • EQUILIBRIUM
  • TOPOLOGY

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