Transition to turbulence in nonuniform coronal loops driven by torsional Alfvén waves - II. Extended analysis and effect of magnetic twist

Open Access

Fig. 3.

Radial profile of the line-tied Alfvén frequency continuum for the twist parameter ranging from c = 0 to c = 0.4. The region between the vertical dashed green lines corresponds to the nonuniform region in density. The values are normalized to the external Alfvén frequency. We used ρ_i/ρ_e = 2 and l/R = 0.4.

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