Fig. 8.

Observed and theoretical profiles for the N II lines at 3995 and 4630 Å. The theoretical profiles have been convolved with a rotational broadening function and are for atmospheric parameters of Teff = 18 000 K and log g = 2.65. The adopted nitrogen abundances are 6.7 (green), 6.9 (blue), and 7.1 (red) dex. Also shown is a theoretical plot for Teff = 16 000 K and log g= 2.45 and a nitrogen abundance of 7.1 dex (dotted red).
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