Fig. 19
Effect of C/H on the intensity of C iii 4650 (left) and C iii 5696 (right) at Teff = 30 500 K. In both panels, the solid line is a solar metallicity model. The dashed (dotted) line is a model with C/H = 1/2 (1/5) C/H⊙, all other elements having the solar abundances. In the left (right) panel, the dot-dashed line is the C/H = 1/2 C/H⊙ model in which the Fe iv 538.057 (574.232) line has been removed.
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