Boundary effects on the magnetohydrodynamic stability of a resistive plasma

M. Velli, A. W. Hood, G. Einaudi

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

Abstract

A general method for studying the resistive MHD stability of plasma configurations where boundary effects are of crucial importance and can be expressed as additional constraints on a periodic system is presented and applied to the case of line-tied cylindrically symmetric coronal loops. The eigenvalue equations obtained are a generalization of the Freidberg and Hewett equations, to which they reduce when the loop length is made infinite. An application to tearing modes is described which shows that in a finite geometry, tearing takes place at the center of the configuration, corresponding to the vertex of coronal loops. Applications to other configurations of astrophysical interest are described.
Original languageEnglish
Pages (from-to)419-427
JournalAstrophysical Journal
Volume350
DOIs
Publication statusPublished - 1 Feb 1990

Keywords

  • Coronal Loops
  • Magnetohydrodynamic Stability
  • Solar Corona
  • Solar Magnetic Field
  • Tearing Modes (Plasmas)
  • Boundary Value Problems
  • Cylindrical Plasmas
  • Fourier Series
  • Photosphere

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