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Fig. 2.
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Ratio of the exponential damping time, τ, to the oscillation period, P, as a function of l/R for the fluting quasi-modes with m = 2, 3, 4, and 5. The gray area corresponds to τ/P < 1, i.e., overdamped quasi-modes. Results were computed with the Frobenius method explained in Soler (2017), considering L/R = 20 and ρi/ρe = 5.
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