Table 1.
Fundamental physical parameters for the targeted lines.
| Line | Transition | λ | ν | F.P. | ncr, e | ncr, H | Eul |
|---|---|---|---|---|---|---|---|
| [ μm] | [GHz] | [eV] | [cm−3] | [cm−3] | [K] | ||
| [OI]63 μm | 3P1−3P2 | 63.18 | 4744.8 | … | … | 2.5 × 105 | 228 |
| [OIII]88 μm | 3P1−3P0 | 88.36 | 3393.0 | 35.12 | 1.7 × 103 | … | 163 |
| [NII]122 μm | 3P2−3P1 | 121.90 | 2459.4 | 14.53 | 299 | … | 118 |
| [OI]145 μm | 3P0−3P1 | 145.53 | 2060.1 | … | … | 2.3 × 104 | 99 |
| [CII]158 μm | 3P3/2 − 3p1/2 | 157.74 | 1900.5 | 11.26 | 52 | 2.0 × 103 | 92 |
| [NII]205 μm | 3P1−3P0 | 205.18 | 1461.1 | 14.53 | 190 | … | 70 |
| [CI]370 μm | 3P2−3P1 | 370.42 | 809.34 | … | … | 720 | 39 |
| [CI]609 μm | 3P1−3P0 | 609.14 | 492.16 | … | … | 620 | 24 |
Notes. Columns correspond to the emission line, transition, central wavelength, central frequency, formation potential (FP), electron (ncr, e), and hydrogen (ncr, H) critical densities, and energy difference between upper and lower level (Eul). We note that ncr, e were extracted from the CLOUDY database, computed for a gas temperature of 10 000 K. The last two columns are taken from Draine (2011), with the ncr, H computed for a gas temperature of 100 K.
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