Fig. 22
Growth rate γ as a function of the slow-down ratio Ωf/Ω. 
represents the averaged Alfvén frequency at the moment when the slow-down begins, i.e. at the time t′. The square and the triangle mark Ωf/Ω of the snapshots from Fig. 21 (top and bottom respectively). The upper abscissa represents the averaged value w which is reached as the result of the slow-down.
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