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Fig. 4
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Variability of the Ca II K and Na I D2 lines in the high resolution ESPRESSO spectra (Table A.1). The shaded areas mark the velocity ranges where absorption is observed. These ranges are the same as in Fig. 3 for the spectra from 2022, while the velocity range of the MVA is different in 2021, being [−150, −110] km s−1.
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