The ALMA survey to Resolve exoKuiper belt Substructures (ARKS) - VII. Optically thick gas with broad CO gaussian local line profiles in the HD 121617 disc

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Table 4

Best-fit geometric and physical parameters derived from fitting a RADMC-3D model to the ¹³CO cube.

Parameter	Best-fit value
R (au)	${74.4}_{- 0.2}^{+ 0.2}$ $\[74.4_{-0.2}^{+0.2}\]$
ΔR (au)	${17.3}_{- 0.9}^{+ 0.9}$ $\[17.3_{-0.9}^{+0.9}\]$
T_{73 au} (K)	${38.1}_{- 1.2}^{+ 1.3}$ $\[38.1_{-1.2}^{+1.3}\]$
β	$- {0.14}_{- 0.07}^{+ 0.07}$ $\[-0.14_{-0.07}^{+0.07}\]$
μ	${12.6}_{- 1.1}^{+ 1.3}$ $\[12.6_{-1.1}^{+1.3}\]$
log M_¹³CO (M_⊕)	$- {2.7}_{- 0.1}^{+ 0.2}$ $\[-2.7_{-0.1}^{+0.2}\]$
i (°)	${44.4}_{- 0.2}^{+ 0.2}$ $\[44.4_{-0.2}^{+0.2}\]$
PA (°)	${59.67}_{- 0.08}^{+ 0.08}$ $\[59.67_{-0.08}^{+0.08}\]$
M_⋆ (M_⊙)	${1.915}_{- 0.009}^{+ 0.009}$ $\[1.915_{-0.009}^{+0.009}\]$

Notes. Quoted values represent the medians of the marginalised posterior distributions. Uncertainties correspond to the 16th and 84th percentiles.

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