Fig. 9.

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Impact of the μ-gradient and of the smoothness of the temperature gradient on the r010 ratios. Left: temperature gradients of model B2 (orange), B3 (blue), and B4 (green) for the top panel, and A5 (orange), A6 (blue), and A7 (green) for the bottom panel as a function of the acoustic radius at Xc = 0.10. Right: corresponding r010 ratios as a function of the frequency.
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