Fig. 13
Comparison of EDIBLES (black) and UVES POP (red) spectra of HD 169454 for interstellar lines of NH(λλ3353.92, 3358.05 Å; top) and CN(1−0) (λλ3579.45, 3579.96, and 3580.9 Å; Meyer et al. 1989; bottom); the telluric spectrum is shown in orange. HD 169454 is a blue supergiant (B1 Ia) – the broad stellar line in the spectrum is He i λ3355 Å.
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