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Table 2

Molecular emission lines detected in Betelgeuse, sorted by increasing frequency and spectral window.

Quantum numbers Rest freq. Lower state
Vibrat. Rotat. (GHz) energy (cm-1)

28SiO ν= 7 8−7 330.47753 8397.36
13CO ν= 0 3−2 330.58797 11.03

30SiO ν= 3 8−7 331.95548 3648.27
28Si17O ν= 1 8−7 332.02199 1245.27
28SiO ν= 6 8−7 332.87874 7238.86

28SiO ν= 2 8−7 342.50438 2487.33
12CO ν= 1 3−2 342.64764 2154.70
29SiO ν= 0 8−7 342.98085 40.05

28SiO ν= 1 8−7 344.91633 1269.89
12CO ν= 0 3−2 345.79599 11.54

Notes. The rest frequencies are taken from the CDMS database (Müller et al. 2005; Endres et al. 2016).

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