Fig. 1
Determination of the ratio He/H for HD 48279. Observed He i and He ii lines are shown by the black solid line. The blue dotted (red dashed; green dot-dashed) lines are models with He/H = 0.10 (0.15; 0.30). The lower right panel shows the χ2 results from the quantitative analysis, from which one determines He/H = 0.16 ± 0.05.
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