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Table 2

Physical parameters of the CH3CN gas and dust observed near 349 GHz towards the accretion disk in G023.01−00.41.

ID X-offset Y-offset Rp Sdust voff FWHMint Trot Size τ4 M500
(″) (″) (au) (mJy) (km s−1) (km s−1) (K) (1016 cm−2) (mas) (M) (1023 cm−2)
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13)
Eastern disk side
P1 –0.074 –0.056 250 29.7 +0.78 ± 0.03 7.37 ± 0.20 70 9.64 0.16 10.0
P2 –0.015 –0.147 750 13.6 +3.25 ± 0.03 5.17 ± 0.56 95 15.00 0.10 6.2
P3 +0.045 –0.238 1250 4.6 +2.69 ± 0.03 4.79 ± 0.16 95 6.31 0.05 2.9
P4 +0.104 –0.330 1750 3.8 +2.83 ± 0.03 3.09 ± 0.09 90 7.01 0.05 2.9
P5 +0.163 –0.421 2250 2.8 +1.86 ± 0.07 3.94 ± 0.06 100 1.27 0.04 2.3
P6 +0.223 –0.512 2750 2.9 +1.70 ± 0.04 3.82 ± 0.07 100 0.75 0.05 2.9
Western disk side
P7 –0.133 +0.036 250 34.2 –0.56 ± 0.03 7.12 ± 0.13 70 6.53 0.17 11.1
P8 –0.193 +0.127 750 14.7 –0.20 ± 0.03 5.98 ± 0.10 95 4.00 0.11 6.6
P9 –0.252 +0.218 1250 6.7 +0.07 ± 0.03 5.82 ± 0.17 95 4.33 0.06 3.9
P10 –0.311 +0.310 1750 4.8 +1.07 ± 0.05 4.54 ± 0.07 90 2.53 0.05 3.3
P11 –0.371 +0.401 2250 3.6 +1.56 ± 0.07 3.54 ± 0.10 100 0.86 0.04 2.7
P12 –0.430 +0.492 2750 2.8 +1.88 ± 0.06 2.72 ± 0.11 65 0.33 0.04 2.6
North-eastern apparent spiral(b)
P13 +0.293 +0.003 1822 3.0 +1.33 ± 0.05 6.55 ± 0.16 114 2.28 0.04 2.3
P14 +0.408 –0.002 2349 3.2 +1.22 ± 0.04 5.43 ± 0.11 114 2.28 0.04 2.4
P15 +0.468 –0.100 2656 3.0 +1.15 ± 0.06 6.78 ± 0.10 114 1.40 0.04 2.3
P16 +0.445 –0.215 2689 3.6 +0.57 ± 0.07 6.66 ± 0.14 90 2.09 0.05 3.1
P17 +0.380 –0.310 2613 3.6 +1.24 ± 0.06 4.69 ± 0.15 90 3.25 0.05 3.2
South-western apparent spiral(b)
P18 –0.754 –0.110 3020 < 0.6(a) +0.57 ± 0.08 8.58 ± 0.15 90 0.94 0.01 0.5
P19 –0.800 –0.007 3196 < 0.6(a) +1.56 ± 0.09 11.51 ± 0.18 90 0.21 0.01 0.5
P20 –0.752 +0.098 3017 < 0.6(a) +0.81 ± 0.09 6.95 ± 0.13 90 0.16 0.01 0.6
P21 –0.651 +0.152 2620 < 0.6(a) +0.77 ± 0.10 6.66 ± 0.08 90 0.32 0.01 0.5
P22 –0.540 +0.178 2181 0.8 +0.35 ± 0.08 5.90 ± 0.08 90 0.63 0.01 0.6

Notes. Column 1: position label with reference to Fig. 1. Columns 2 and 3: offset positions of each pointing with respect to the phase centre. Column 4: projected distance from the star position. Column 5: integrated continuum flux at 860 μm. The following parameters in Cols. 6 to 11 were estimated by modelling the 19K →18K emission of CH3CN and CHCN with Weeds and MCWeeds, assuming LTE conditions, and they are shown with their statistical errors. Columns 6 and 7: line velocity offset, with respect to 77.4 km s−1, and intrinsic line FWHM. Columns 8 to 10: rotational temperature and column density of molecular gas and source size. Column 11: opacity of the CH3CN (194–184) line. Columns 12 and 13: gas mass and H2 column density estimated from Sdust within a circular area with a 500 au diameter each. (a)Upper limit set at 3 σ. (b)The north-eastern and south-western directions are named here with respect to the disk midplane in Fig. 2.

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