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Fig. 1.
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Brunt-Väisälä (N; in blue), Lamb (for l = 2; S2; in orange), and tidal (ωt; in green) frequencies for a planetary companion orbiting an RGB star with MZAMS = 1 M⊙ at a distance of 1 AU. The colours mark the regions where the different types of waves can be excited (see the main text for details).
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