Are coronal loops stable

Details Are coronal loops stable Are coronal loops stable

Nov 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981natur.294..333c&link_type=abstract

Nature, vol. 294, Nov. 26, 1981, p. 333, 334.

Physics

19

Coronal Loops, Magnetohydrodynamic Stability, Radiative Transfer, Solar Physics, Energy Transfer, Solar Temperature

Scientific paper

A normal mode analysis was applied to a thermally isolated coronal loop to account for the disruptive effects of radiative instability. Two boundary conditions were considered: the base was held at a fixed chromospheric temperature, and the heat flux was assumed to vanish at the base. The loop was shown to be marginally stable when the base temperature is held fixed, implying that the instability is relatively insignificant if the amount of radiatively stable chromospheric material at the foot of the transition region is sufficiently large. Between 1-10% of the chromosphere mass is calculated to be necessary to counter the instability, and the calculations are projected to remain valid with the inclusion of energy transport by radiative transfer in the chromosphere.

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