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

Open Access

Fig. 4

Best-fit (highest log posterior probability) ¹²CO models, normalised HD 131488 data, and residuals. Top: HD 131488 ¹²CO data (solid black line) overlaid with the best-fit model (dotted blue line). Bottom: ¹²CO residuals (solid black line) and 2σ, calculated as twice the rolling standard deviation (dashed green line).

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