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Fig. 3

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Hα (left panel, 188 original BeSS spectra), Hβ (middle panel, 110 original BeSS spectra), and He I (right panel, 57 original BeSS spectra) profiles of 59 Cyg folded with the orbital period of 28.192 d. The Hα profiles are sampled in bins 0.02 wide in phase. Phase 0 corresponds to the RV minimum as in Maintz et al. (2005). In addition to orbital phase, the scale of the ordinate also indicates the flux in units of the ambient continuum level. For the Ha (Hβ) profiles it was reduced by a factor of 7 (2), and the helium lines were not rescaled. These observations are from 2003 August through 2021 October.

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