Open Access
Table 5
Column density ratios in TMC 1-C.
| nH = 4 × 105 cm−3 | nH = 106 cm−3 | |
|---|---|---|
| Deuterium fraction | ||
| D13CN/H13CN | <2.67 × 10−2 | <3.11 × 10−2 |
| DN13C/HN13C | (9.38 ± 3.34) × 10−2 | 0.108 ± 0.038 |
| DCN/H13CN | 1.53 ± 0.54 | 1.84 ± 0.66 |
| DNC/HN13C | 2.82 ± 1.00 | 2.87 ± 1.02 |
| DCN/HCN | (7.50 ± 2.65) × 10−2 | 0.111 ± 0.039 |
| DNC/HNC | 1.05 ± 0.37 | 0.89 ± 0.31 |
| C and N isotopic ratios | ||
| DCN/D13CN | >57.24 | >59.37 |
| DNC/DN13C | 21.60 ± 10.71 | 16.07 ± 9.41 |
| HCN/H13CN | 20.38 ± 7.20 | 16.64 ± 5.95 |
| HNC/HN13C | 2.69 ± 0.95 | 3.23 ± 1.15 |
| HCN/HC15N | 148.97 ± 52.85 | 119.41 ± 42.57 |
| HNC/H15NC | 9.56 ± 3.39 | 10.80 ± 3.82 |
| H13CN/HC15N | 7.31 ± 2.59 | 7.18 ± 2.57 |
| HN13C/H15NC | 3.56 ± 1.26 | 3.33 ± 1.19 |
| Isomeric ratios | ||
| H13CN/HN13C | 1.33 ± 0.47 | 0.94 ± 0.34 |
| HC15N/H15NC | 0.64 ± 0.23 | 0.44 ± 0.16 |
| HCN/HNC | 10.05 ± 3.56 | 4.83 ± 1.71 |
| DCN/DNC | 0.72 ± 0.25 | 0.60 ± 0.21 |
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