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Fig. 8.

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Long-term evolution of the epoch-averaged FWHM. The panels show the results from optical (circles) and near-infrared (pluses) observations of EV Lac (top), DS Leo (middle), and CN Leo (bottom). In all panels, the data points are colour-coded based on the line mask used for LSD: full (black), low-geff (purple), and high-geff (yellow). The left y-axis refers to the optical observations, and the right y-axis to the near-infrared observations.

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