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Fig. 9
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Comparison of selected He I and He II lines in the optical spectrum of PG 0909+276. Our model with parameters by Wild & Jeſſery (2018, Teff = 36 900 K, [C] = 0.383) is shown in blue, our model with Teff = 32 900 K and [C] = 0.197 in red, and the FOCES spectrum in gray.
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