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Fig. 4


Regions around the [O I] lines in ALW-8. The best spectrum (red) was computed with log ϵ(O) = 6.93 (top panel) and log ϵ(O) = 7.23 (bottom panel), respectively. The green and blue lines indicate syntheses corresponding to the range of uncertainty of ±0.3 dex in oxygen abundance. The poor fitting of CN features around [OI] comes solely from the change in the oxygen abundance.

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