Fig. 1.
Power indices a and b in the parametrisation of the coronal heating function as ℋ(ρ, T) ∝ ρaTb, determining stability of acoustic and thermal modes with (right panel) and without (left panel) thermal conduction. The red triangles show the values of a and b for the heating models from Ibanez et al. (1993). The green triangle shows the heating model used as an example in Fig. 2.
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