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Table A.3

Best-fit model parameters obtained for channel maps of the disc of AS 209.

AS 209(121.0 pc)

Attribute Parameter Unit 12CO 13CO C18O
Orientation i [°] −37.3 [−35.0] −33.5 [−35.0] −32.9 [−35.0]
PA [°] 85.6 [85.2] 85.8 [85.9] 85.5 [85.4]
xc [au] 0.0 [0.6] −1.5 [−0.7] −1.3 [−1.8]
yc [au] −1.8 [−1.6] −2.9 [−0.3] −3.7 [−6.7]

Velocity M* [M] 1.14 [1.27] 1.35 [1.26] 1.41 [1.28]
υsys [km s−1] 4.64 [4.63] 4.66 [4.66] 4.66 [4.66]

Upper surface z0 [au] 36.7 10.2 7.0
p [–] 3.20 1.57 3.56
Rt [au] 105.9 190.8 153.9
q [–] 1.30 7.04 7.05
Lower surface z0 [au] 7.4 25.3 --
p [–] 2.03 3.63 --
Rt [au] 322.4 96.0 --
q [–] 7.37 1.78 --

Peak intensity I0 [Jy px−1] 0.072 0.132 0.004
p [–] −1.84 −1.41 −1.32
q [–] 0.84 1.31 0.39
Line width Lw [km s−1] 0.33 0.17 0.27
p [–] −0.42 −0.24 1.83
q [–] −0.11 −0.25 0.38
Line slope Ls [–] 1.71 1.46 0.82
p [–] 0.14 0.48 1.52

Notes. Parameters in brackets result from fixing inclination to the value found for the millimetre continuum in Huang et al. (2018a).

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