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Table 12
Median column densities in a(x) = a × 10x for observations and best-fit IRDC model.
| Molecule | Observed col. den. | Modeled col. den. |
| [cm-2] | [cm-2] | |
|
|
||
| CO | 1.9(18) | 2.1(18) |
| HNC | 1.5(14) | 2.0(14) |
| HCN | 9.1(13) | 2.1(14) |
| HCO+ | 1.2(14) | 5.4(13) |
| HNCO | 1.9(12) | 5.3(11) |
| H2CO | 3.5(13) | 7.2(13) |
| N2H+ | 2.2(13) | 3.0(12) |
| CS | ≤6.0(14) | 1.4(15) |
| SO | ≤8.4(12) | 7.6(13) |
| OCS | ≤2.7(15) | 2.8(12) |
| C2H | 3.8(14) | 1.9(14) |
| SiO | 1.9(12) | 6.0(12) |
| CH3CN | ≤5.2(12) | 3.3(12) |
| CH3OH | ≤4.8(13) | 2.0(12) |
|
|
||
| Agreement | 14/14 = 100% | |
Notes. When the molecule was detected in fewer than 50% of the sources, we marked it as an upper limit.
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