Hydrogen lines in BD+46°442 (black dots) compared to the most closely fitting of the available synthetic profiles (grey solid lines), that were computed with T_eff = 6250 K, log g = 2.0, [M/H]  =  −0.5. To match the resolution of the model Paschen lines, the observed profiles were convolved to R = 20   000, while Balmer lines are shown at the native HERMES resolution of 85 000.