Fig. 7
Left panel: comparison between the observed He i line profile at ~4471 Å (black solid line) of HD 47777 and non-LTE synthetic spectra calculated with the solar (blue dotted line) and adopted (red dashed line) He abundance. For both synthetic spectra we adopted the final Teff value of 22000 K. Right panel: as for the left panel, but for the Hβ line.
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