High CO/H2 ratio supports an exocometary origin for a CO-rich debris disc

Open Access

Fig. 5

Ratio of CO and H₂ abundances for protoplanetary discs, β Pictoris, and the two exocometary belts in this study. Table D.1 lists references for each point. The plot is adapted and expanded from Bergin & Williams (2017) and Zhang et al. (2020).

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