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Fig. 2
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He II lines in CASPEC and UVES spectra of the O(He) star JL 9 (blue). At the bottom, a very weak He I line is depicted. The many spikes in the CASPEC spectra are caused by cosmic ray hits. Overplotted in red is our final model with Teff = 80 000 K, logg = 5.2, and elementabundances as given in Table 4.
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