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Fig. 5.
Comparison of the Pa11 line from W1045 (O9.5 II, left panel) and W1015 (O9 III, right panel) to synthetic model atmosphere spectra for 30 kK and 32 kK respectively. Note the influence of He I 8839Å on the blue wing of W1045, which is not well reproduced by the non-tailored fit used.
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