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 CH
CN 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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