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Table B.1
Critical densities.
| Transition | A ul a | γ ul b | T c | n cr d |
| (s-1) | (cm3 s-1) | (K) | (cm-3) | |
|
|
||||
| C18O 2–1 | 6.01×10-7 | 7.15×10-11 | 10 | 8.4×103 |
| C17O 2–1 | 6.43×10-7 | 7.15×10-11 | 10 | 9.0×103 |
| CH3OH 20–10 A+ | 3.41×10-6 | 1.10×10-10 | 10 | 3.1×104 |
| CH3OH 21–11 E | 2.49×10-6 | 7.50×10-11 | 10 | 3.3×104 |
| H13CO+ 1–0 | 3.85×10-5 | 2.60×10-10 | 10 | 1.5×105 |
| N2H+ 1–0 | 3.90 ×10-5 | 1.60×10-10 | 10 | 2.4×105 |
| HNC 1–0 | 2.69×10-5 | 9.71×10-11 | 10 | 2.8×105 |
| C34S 2–1 | 1.60×10-5 | 5.30×10-11 | 20 | 3.0×105 |
| CS 2–1 | 1.68×10-5 | 5.30×10-11 | 20 | 3.2×105 |
| HC3N 10–9 | 5.81×10-5 | 9.70×10-11 | 10 | 6.0×105 |
Notes.
(d)
Critical density computed with Eq. (B.1).
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