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Table 1
Characteristics of the PACS FIR fine-structure cooling lines.
| Species | λ | Transition | IP | ΔE/k a | ncrit |
| [μm] | [eV] | [K] | [cm-3] | ||
|
|
|||||
| [C ii] | 157.7 |
|
11.3 | 91 | 50b, 2.8 × 103 |
| [N ii] | 121.9 |
|
14.5 | 188 | 310 |
| [N ii] | 205.2 |
|
14.5 | 70 | 48 |
| [N iii] | 57.3 |
|
29.6 | 251 | 3.0 × 103 |
| [O i] | 63.2 |
|
– | 228 | 4.7 × 105 |
| [O i] | 145.5 |
|
– | 327 | 9.5 × 104 |
| [O iii] | 88.4 |
|
35.1 | 163 | 510 |
Notes. Values taken from Madden et al. (2013). The IP for [O ii] is 13.62 eV.
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