Fig. 2
CaII K absorption line region (λ = 3933.6 Å) of the co-added CORALIE spectra. This region is contaminated by a few thin thorium emission lines that were filtered while co-adding the spectra. No significant re-emission lines are present at the bottom of the CaII absorption region for the stars displayed in the upper panel, from top to bottom HD 27631, HD 98649, HD 106515A, HD 196067, HD 219077, HD 220689, HD 10647, HD 30562, and HD 86226 . The large re-emission for HD 166724 (lower panel) indicates the significant chromospheric activity of the star.
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