Fig. 3.
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Dynamical spectra. Left and middle: Strongly variable cores of Hβ line profiles in HD 169142 and corresponding dynamical spectra constructed using ESPaDOnS and HARPSpol spectra. Right: Dynamical spectrum calculated for the variable emission Hβ line observed in the SB2 system HD 104237 consisting of a weakly magnetic Herbig Ae/Be star and a strongly magnetic T Tauri component. The ring-like features are centred at the phases where the maximum longitudinal magnetic field is observed.
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