Fig. 4
Examples of line profiles of three stars. Left: HD 97166; Si iii 4553 Å (gray) and He ii 5411 Å (black) in the spectrum of JD 2 454 625. Middle: HD 115455; lines He i 4922 Å (black) and He ii 5411 Å (dashed) at JD 2 453 967 and He i 4922 Å at 2 454 244 (gray). Right: HD 123590; He i 4922 Å and He ii 5411 Å at JD 2 453 970.
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