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Table 3
Critical densities.
| Molecule | Transition | Aij | Cij | ncrit |
|---|---|---|---|---|
| (s−1) | (Tk = 10 K) | (cm−3) | ||
| CS | 2 →1 | 1.679 × 10−5 | 4.7 × 10−11 | 3.3 × 105 |
| C18O | 1 →0 | 7.203 × 10−8 | 3.3 × 10−11 | 2.0 × 103 |
| H13CO+ | 1 →0 | 3.853 × 10−5 | 2.6 × 10−10 | 1.4 × 105 |
| HCS+ | 1 →0 | 1.109 × 10−5 | 3.8 × 10−10 | 2.9 × 104 |
| H13CN | 1 →0 | 2.225 × 10−5 | 3.0 × 10−11 | 7.2 × 105 |
| SO | 34 →23 | 3.165 × 10−5 | 8.3 × 10−11 | 3.7 × 105 |
| HNC | 1 →0 | 2.690 × 10−5 | 9.7 × 10−11 | 2.8 × 105 |
| OCS | 7 →6 | 1.714 × 10−6 | 7.6 × 10−11 | 2.2 × 104 |
| H2S | 110 →101 | 2.653 × 10−5 | 3.4 × 10−11 | 4.8 × 105 |
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