Fig. 5

Normalized X-shooter spectrum of CEN 34 (black) in the wavelength range 2.28–2.39 μm, covering the CO bandhead absorption. For comparison, the reference spectrum of the mid-G supergiant HIP 107348 (SpT G5 Ib; Wallace & Hinkle 1997) is shown in red. The spectrum of CEN 34 has been smoothed to the spectral resolution (R 3000) of the reference spectrum.
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