Fig. 3
The black solid line is the Brunt-Väisälä frequency, N, while the red, green, blue, and yellow lines are the Lamb acoustic frequencies, Sℓ, for ℓ = 1, 2, 4, and 5, respectively. The dashed horizontal lines correspond to the modes indicated in the text (the ℓ = 1 and ℓ = 2 p-modes look like a single thick line). Model 1 was used.
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