Spectra according to the temperature structures of the new series A (left panel) and B (right panel) of models in Fig. 2 (corresponding color-coding) in the spectral ranges of He I D₃, Na I D₂, Hα, the bluest Ca II IRT line, and the He I IR line (from top to bottom). For comparison, the underlying photosphere model (T_eff =3500 K, log g =5.0 dex, [Fe ∕H ] = 0.0 dex, [α∕Fe ] = 0.0 dex) is plotted aswell. The photosphere is taken from Husser et al. (2013).