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Table 4
Parameters used for the chemical models of each core.
| Source | n | Tgas | Tgrain |
|---|---|---|---|
| HOPS-108 | 2 × 103−1 × 104 | 19.6 | 19.6 |
| Vela C IRS 31 14 | 2 × 103−1 × 104 | 15.1 | 15.1 |
| BHR71-IRS1 | 1 × 104−5 × 104 | 13.1 | 13.1 |
| G300.91+0.88 | 2 × 103−1 × 104 | 14.7 | 14.7 |
| G304.76+1.34 | 2 × 103−1 × 104 | 13.7 | 13.7 |
| G309.91+0.32 | 2 × 103−1 × 104 | 17.6 | 17.6 |
| Cha MMS1 (high n) | 3 × 105−1.4 × 106 | 8.5–11 | 13.2 |
| Cha MMS1 (low n) | 1 × 104−5 × 104 | 11.0 | 13.2 |
| Cha C2 (high n) | 2 × 105−8 × 105 | 8.5–11 | 13 |
| Cha C2 (low n) | 3 × 103−1 × 104 | 11.0 | 13.0 |
| TMC-1 | 3 × 104 | 10.0 | 10.0 |
Notes. Entries in the table are the source, density (cm−3), gas and grain temperatures (K). C/O ratios for each set of parameters are set to 0.5, 0.7, 0.9 and 1.4.
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