Comments on the MHD stability of coronal plasmas with line-tying

Details Comments on the MHD stability of coronal plasmas with line-tying Comments on the MHD stability of coronal plasmas with line-tying

Jun 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...281..419a&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 281, June 1, 1984, p. 419-425.

Other

17

Coronal Loops, Magnetohydrodynamic Stability, Solar Corona, Boundary Conditions, Boundary Value Problems, Hydrodynamic Equations, Plasma Equilibrium

Scientific paper

The effect of line-tying in the photosphere on the magnetohydrodynamic (MHD) stability of coronal loops has been investigated by a number of authors. The author comments on the various boundary conditions, plasma displacement functions, and other assumptions used by a number of investigators. Then he studies kink instabilities in cylindrical plasmas. The results are very different from those of a previous study which used a nonhelical test function, which indicates the importance of a helical test function. It is found that the effects of line-tying on force-free equilibria are not the same as on non-force-free equilibria.

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