Table C.1
Optical depths and abundance ratios for SO, 13CO, OCS, and CH3CN lines with respect to their rare isotopologue lines in each substructure of NGC 7538S and IRS1-mmS
| Species | ℜα | MM1 | MM2 | MM3 | JetN | JetS | IRS1−mmS | |
| (172 ± 23 K) | (137 ± 14 K) | (50 K) | (150 K) | (150 K) | (162 ± 14 K) | |||
| τ SO (65 → 54) | 44.5 | 7.5 | − | ≤ 24 | ≤ 6.5 | 10 | ||
| N SOτ / N 33SO | † | 127 | 112.20± 0.96 | 94.46± 10.42 | − | ≤ 638.08 | ≤ 409.18 | 132.30± 21.26 |
| N SO / N 33SO | ⋆ | 2.52± 0.02 | 12.59± 1.39 | − | ≥ 26.59 | ≥ 62.86 | 13.23± 2.13 | |
|
13.5 | 9 | ≥ 9 | 8 | 8 | − | ||
| N 13COτ / N C18O | † | 8.3 | 16.07± 0.52 | 17.58± 0.02 | ≥ 12.54 | 13.84± 0.52 | 16.00± 0.95 | − |
| N 13CO / N C18O | ⋆ | 1.19± 0.04 | 1.95± 0.00 | ≤ 1.39 | 1.73± 0.06 | 2.00± 0.12 | − | |
| τ OCS (18 → 17) | 4.5 | 5.5 | 36 | ≤ 38 | 15 | 4 | ||
| N OCSτ / N O13CS | † | 73.5 | 76.71± 1.88 | 72.81± 16.34 | 69.24± 1.17 | ≤ 159.60 | ≤ 72.06 | 86.40± 27.69 |
| N OCS / N O13CS | ⋆ | 16.86± 0.41 | 13.18± 2.96 | 1.92± 0.03 | ≥ 4.20 | ≥ 4.80 | 21.20± 6.80 | |
| τ CH3CN (122 → 112) | 16 | 3 | ≤29 | − | − | 7 | ||
|
† | 73.5 | 70.22± 7.06 | 78.13± 2.02 | ≤ 119.60 | − | − | 71.88± 5.30 |
|
⋆ | 4.39± 0.44 | 24.75± 0.64 | ≥ 4.12 | − | − | 10.26± 0.76 | |
Notes.1)
mark the estimations with or without optical depth correction, respectively. 2) ≥ (≤) come from the 3σ limit of the non-detection or partly absorption of C18O in IRS1-mmS. 3) The ratios ℜα between isotopes of 12C /13C and 16O /18O are provided from the Galactic ISM ratio measured in Giannetti et al. (2014) (with RGC(NGC 7538) ~ 9.7 kpc), while 32S /33S is provided from the solar system ratio measured in Lodders (2003). 4) Uncertainties on the measured values are typically ≤10% as determined from Trot, partition function Q(Trot), and Gaussian fit to TB(υ)dυ.
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