Stability of stressed current tubes and energy storage in the solar corona

Details Stability of stressed current tubes and energy storage in the solar corona Stability of stressed current tubes and energy storage in the solar corona

Mar 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...338.1158c&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 338, March 15, 1989, p. 1158-1170.

Astronomy and Astrophysics

Astrophysics

3

Magnetic Energy Storage, Magnetohydrodynamic Stability, Solar Atmosphere, Solar Corona, Solar Flares, Magnetic Flux, Photosphere, Solar Magnetic Field

Scientific paper

Ideal MHD stability in the solar corona is studied in order to understand the issue of magnetic energy storage. It is shown that circular flux tubes confined by a potential field can store a large fraction of their energy in nonpotential form. Such tubes are stabilized by their circularity, by line tying, and by their external field. In contrast, interacting, noncircular tubes can be far less stable, despite line tying and an external field. If a substantial fraction of the magnetic energy in an active region is to be stably stored in nonpotential form, only a very simple magnetic geometry is probably required.

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