Fig. 3.
Frequency dependence of the torsional wave (normalised by the Alfvén wave frequency) on the dimensionless parameters representing the equilibrium twist 𝒦 and rotation ℛ at ka = 0.1. The combined effects of the equilibrium twist and rotation are pictured. In the top panel the plasma-β is taken to be zero, while in the bottom panel the plasma-β is taken to be equal to 0.5. The surface plots are obtained using the full dispersion relation (Eq. (19)).
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