Table A.8
Median column densities in a(x) = a × 10x for observations (including detections and upper limits) and best-fit IRDC model.
| Molecule | Obs. col. den. | Mod. col. den. |
| [cm-2] | [cm-2] | |
|
|
||
| CO | 1.9(18) | 2.8(18) |
| HNC | 9.7(13) | 5.8(14) |
| HCN | 7.2(13) | 7.1(14) |
| HCO+ | 7.9(13) | 8.9(13) |
| HNCO | 2.4(12) | 2.7(12) |
| H2CO | 1.7(13) | 5.1(13) |
| N2H+ | 2.2(13) | 2.2(12) |
| CS | ≤4.7(14) | 6.8(14) |
| SO | ≤6.6(12) | 5.4(13) |
| OCS | ≤4.2(14) | 4.0(12) |
| C2H | 4.8(14) | 2.5(14) |
| SiO | 2.3(12) | 3.5(12) |
| CH3CN | ≤3.7(12) | 1.3(13) |
| CH3OH | ≤4.1(13) | 2.8(13) |
| DCO+ | ≤3.1(11) | 5.9(11) |
| DCN | ≤6.1(11) | 2.4(12) |
| DNC | ≤6.1(11) | 1.6(11) |
| N2D+ | ≤6.8(11) | 4.0(8) |
|
|
||
| Agreement | 18/18 = 100% | |
Notes. Modeled best-fit values in italics do not agree with the observed values within one order of magnitude. If the molecule is detected in less than 50% of the sources, we marked it as an upper limit.
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