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Fig. 3
GIANO H-band spectra of the 12CO (3–0), (5–2), (6–3) and (8–5) bandheads and K-band spectra of the 13CO (2–0) bandhead for the five observed RSG stars (dotted lines). Our best-fit models are overplotted as solid lines. Rest frame wavelengths are defined in air and thickmarks represent every Å in each panel.
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