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Fig. 4
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O I λλλ7772–7774–7775 and O II λ4254 lines of the B8 super-giant Sk − 67◦ 195 (black line). Red line: the preferred model the temperature of which (Teff = 12.5 kK) was obtained from fitting He I λ4471 and Mg II λ4481, and a comparison with higher Teff = 14.0 kK.
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