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Table 3
Origin of the molecules discussed in Sect. 5 based on their transitions detected in this line survey.
| Hot gas at | Hot and dense | Warm and dense | Lower (<100 K) | Diffuse | Orion Ridge | |
| average density | gas | gas | temperatures | gas | material | |
|
|
||||||
| CH+ | C2H | C2H | SO | CF+, HF, CN | OH+, HCl | |
| Molecules | HCO+ | H2CO | CS | HCN | HCO+, CH+ | CO, 13CO |
| CN | CO, 13CO, C18O | C17O | SO | |||
| Tkin (K) | >200 | ≳300 | 100–150 | 50–80 | ||
| n (cm-3) | ~105 | ≳ 106 | 105−106 | 5 × 105−106 | ||
Notes. The temperatures and densities are based on the RADEX models in Sect. 4.3.
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