Fig. 1
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Portion of the spectrum of star CES 1222+1136, showing the NH band at 3360 Å. The solid curves show the best fit with A(N) = 5.48 (thicker red line), and the red shaded areas display A(N) ± 0.30 dex. The dashed blue line represents the synthesis if N is fully removed. The atmospheric parameters Teff (K), log ɡ, [Fe/H], and υturb (km s−1) are shown in the lower right corner.
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