Fig. A.3

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Real and imaginary parts of the double turning point r0 versus Ω0/f for different azimuthal wavenumbers: m = 0 (black), m = 1 (blue) and m = 2 (red; panels a and b). Gray-shaded areas represent the centrifugally stable regime. Panel c displays the movement of the double turning point r0 in the complex plane as m changes for Ω0/f= 5 (black) and Ω0/f= −2 (blue).
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