Fig. 12.

Spectral classification of the O9.5e star (star 420, upper panel) and the O9.5/B0e star (star 432, lower panel). The two stellar spectra (in black) are compared to three standard star spectra of spectral type O9, O9.5, and B0 in blue, red, and green (described in Sect. 4.1), downgraded to MUSE resolution. The continuous line shows the original spectra, and the dash-dotted line shows the spectra after rotational broadening by 200 km s−1 was applied.
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