Comparison of the observed spectrum (black line) with synthetic spectra computed for a manganese abundance of −4.2 dex (red line) and −3.8 dex (blue line). The plot on the left shows how the computed core of the line at 2716.793 Å increases with increasing abundance, although it does not fit the observed spectrum even with −3.8 dex. A still larger abundance would develop unobserved wings. The line is computed with the hyperfine structure included. The strongest hyperfine components are those at 2716.796 Å and 2716.806 Å. The plot on the right shows how the wings of the strong Mn ii line at 2949.204 Å are well fitted by the profile computed with the abundance of −4.2 dex. The higher abundance gives rise to unobserved wings. The meaning of the labels is the same as in Fig. 1.