(Left panel) Dispersion curves of forward propagating stable and unstable kink waves in a twisted magnetic flux tube with the same input parameters as in Fig. 1 for various values of the Alfvén-Mach number MA. The non-labelled green closed curve corresponds to MA = 1.325, and the black one – to MA = 1.328. (Right panel) Growth rates of the unstable kink waves for MA = 1.32205,1.347,1.372, and 1.397.
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