Panel a) propagation diagrams of models A (red solid lines) and B (blue dashed lines). The thick lines represent the Brunt-Väisälä frequency, the thin lines the ℓ = 1 Lamb frequency. The dotted line indicates the frequency of the avoided crossing (identical for both models). We then represent the central profiles of the nuclear reaction rate εtot(r) (panel b)), of the gradient of mean molecular weight ∇μ (panel c)), and of the temperature gradient ∇ (panel d)) for both models. The colored dotted lines indicate the boundaries of the evanescent zone for each model.
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