Fig. 7
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RVs of discrete absorption in three spectral lines of HD 192639 during the rising part of the trough event. Different symbols stand for different lines as shown by the insert. The red long-dashed line corresponds to a bluewards acceleration of 3 m s–2. The short-dashed lines correspond to the predictions from Eq. (6) for line-formation regions between 1.17 and 1.21 R*.
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