Resistive tearing mode in coronal neutral sheets

Details Resistive tearing mode in coronal neutral sheets Resistive tearing mode in coronal neutral sheets

Feb 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982soph...76...29j&link_type=abstract

Solar Physics, vol. 76, Feb. 1982, p. 29-43. Deutsche Forschungsgemeinschaft

Physics

14

Neutral Sheets, Solar Corona, Solar Magnetic Field, Solar Oscillations, Tearing Modes (Plasmas), Asymptotic Methods, Boundary Layers, Current Density, Equilibrium Equations, Fourier Analysis, Magnetic Field Configurations

Scientific paper

It is noted that the apparent stability of coronal neutral sheets with respect to the resistive tearing mode has been attributed by other investigators to the influence of a weak normal component of the confining magnetic field. To test this hypothesis, a normal mode analysis is performed applying rigorously a singular perturbation technique. Allowance is made for a value of the normal component that is large when measured in the appropriate units deduced from the dynamics of the one-dimensional tearing mode. The structure of the eigenmodes is completely changed; the singular layer decays into a broad band of filaments with antiparallel flow directions, and spatial oscillations appear in the perturbed current density. Surprisingly, the growth rate does not undergo a change.

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