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Fig. 13.

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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.

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