Strong Fe ii line λ4233, illustrating the unusual metallic-line profiles. The gray (red online) synthesis is based on a T_eff = 10 000 K, log g = 2.5 non-LTE spectrum synthesis model with 10 × solar abundances, but with the Stark broadening increased by a factor of 6 × 10³! The dark gray (blue online) rotational profile used a 10 × solar iron abundance, with Vsin(i) = 100 km s^-1 and standard Stark broadening.