Table 2
Best-fit parameters for molecules detected towards SMM1-a in a 1.′′2 beam.
| Molecule | Lines | NT | Tex | VLSR | ΔV | [X] / [CH3OH] | [X] / [HNCO] |
|---|---|---|---|---|---|---|---|
| # | (cm−2) | (K) | km s−1 | km s−1 | |||
| HOCH2CN | 18 | (7.4 ± 0.9) × 1014 | 260 ± 45 | 6.8 ± 0.2 | 2.5 ± 0.3 | 6.2 × 10−4 | 7.4 × 10−2 |
| CH3NCO | 12 | (6.4 ± 1.9) × 1014 | 240 ± 60 | 7.0 ± 0.4 | 3.0 ± 0.6 | 5.3 × 10−4 | 6.4 × 10−2 |
| D2CO | 3 | (5.4 ± 2.5) × 1014 | [200] | 7.4 ± 0.4 | 3.9 ± 0.2 | 4.5 × 10−4 | 5.4 × 10−2 |
CH OH |
4 | (2.0 ± 1.1) × 1015 | 250 ± 60 | 7.1 ± 0.2 | 2.8 ± 0.3 | – | – |
| 12CH3OH(a) | 5(b) | 1.1 × 1018 | – | – | – | 1.0 | 110 |
| CH3CN(c) | 6 | (1.3 ± 0.3) × 1015 | 190 ± 25 | 7.5 ± 0.2 | 3.4 ± 0.3 | 1.1 × 10−3 | 0.1 |
| NH2CN | 3 | (5.1 ± 1.3) × 1013 | 190 ± 40 | 7.1 ± 0.2 | 3.2 ± 0.4 | 4.3 × 10−5 | 5.1 × 10−3 |
| HN13CO | 3 | (1.9 ± 0.3) × 1014 | 190 ± 30 | 7.6 ± 0.2 | 3.5 ± 0.3 | – | – |
| HN12CO(a) | 5(b) | 1.0 × 1016 | – | – | – | 1.1 × 10−2 | 1.0 |
| CH3CH2OH | 14 | (4.1 ± 0.9) × 1015 | 210 ± 25 | 7.3 ± 0.2 | 2.8 ± 0.6 | 4.1 × 10−3 | 0.3 |
| CH3OCHO | 24 | (7.4 ± 0.7) × 1015 | 215 ± 20 | 7.3 ± 0.2 | 3.1 ± 0.3 | 7.4 × 10−3 | 0.6 |
| a-(CH2OH)2 | 14 | (1.7 ± 0.5) × 1015 | 195 ± 70 | 7.2 ± 0.2 | 2.7 ± 0.3 | 1.7 × 10−3 | 0.1 |
| CH3CNO | 0 | ≤1.0 × 1013 | [200] | [7.0] | [3.5] | ≤9.1 × 10−6 | ≤1.0 × 10−3 |
| CH3OCN | 0 | ≤5.0 × 1013 | [200] | [7.0] | [3.5] | ≤4.6 × 10−6 | ≤5.0 × 10−3 |
| CH2CNH | 0 | ≤1.0 × 1015 | [200] | [7.0] | [3.5] | ≤8.3 × 10−4 | 0.1 |
| CH(O)CN | 0 | ≤2.0 × 1014 | [200] | [7.0] | [3.5] | ≤1.7 × 10−4 | ≤2.0 × 10−2 |
| NH2CH2CN | 0 | ≤1.0 × 1014 | [200] | [7.0] | [3.5] | ≤8.3 × 10−5 | ≤1.0 × 10−2 |
Notes. Values in brackets are assumed. (a)Main isotopologue column densities are determined by applying the ratios 16O/18O = 560 and 12C/13C = 52.5 to the minor isotopologue column densities. (b)The number of lines identified of the main isotopologue in this data set. (c) The CH3 CN best-fit parameters are determined from its vibrationally excited state ν8 = 1.
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