Thermal instabilities in magnetically confined plasmas - Solar coronal loops

Details Thermal instabilities in magnetically confined plasmas - Solar coronal loops Thermal instabilities in magnetically confined plasmas - Solar coronal loops

Dec 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...234.1113h&link_type=abstract

Astrophysical Journal, Part 1, vol. 234, Dec. 15, 1979, p. 1113-1121.

Astronomy and Astrophysics

Astrophysics

43

Magnetohydrodynamic Stability, Solar Corona, Thermal Instability, Atmospheric Heating, Chromosphere, Loops

Scientific paper

The thermal stability of confined solar coronal structures ('loops') is investigated, following both normal mode and a new, global instability analysis. It is demonstrated that: (1) normal mode analysis shows modes with size scales comparable to that of loops to be unstable, but to be strongly affected by the loop boundary conditions; (2) a global analysis, based upon variation of the total loop energy losses and gains, yields loop stability conditions for global modes dependent upon the coronal loop heating process, with magnetically coupled heating processes giving marginal stability. The connection between the present analysis and the minimum flux corona of Hearn is also discussed.

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