Fig. 2.
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Equilibrium radial profiles of the Alfvén speed, vA(r), and sound speed, vs(r), for the twist parameter ranging from c = 0 to c = 0.4. The sound speed is the same in all cases. The region between the vertical dashed lines denotes the inhomogeneous region in density. The values are normalized with respect to the Alfvén speed at r → ∞. We used ρi/ρe = 2 and l/R = 0.4.
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