Fig. 1
Observed He ii line profiles of the Pickering, Fowler, and Balmer series (from top to bottom) compared to a model with Teff = 200 000 K and log g= 6.7. The model includes metals with the finally adopted abundances. For comparison, the λ 6560 Å line (top) from a pure-helium model is shown (dashed). The corresponding temperature structures are displayed in Fig. 11.
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