Comparison of the profiles of He Iλ5016, He Iλ7065 and the unidentified line species at approximately 4812 Å in velocity space. We subtracted a suitable linear pseudo-continuum from each line and shifted the profiles in flux for clarity. The positions of the left and right peak of Ca IIλ8662 at −615 km s⁻¹ and +950 km s⁻¹, respectively, are indicated with gray lines. All three line profiles show indications for a similar double-peaked structure and have an identical width of FWHM ≈ 2170 km s⁻¹ when normalized to the profile peak, and of FWHM ≈ 2500 km s⁻¹ when the additional central emission is taken into account.