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Table 6
Molecular column densities and fractional abundances with respect to H2.
| Source | N(C17O) | N(N2H+) | N(N2D+) | N(H13CO+) | N(HCO+) | N(DCO+) |
| [1015 cm-2] | [1013 cm-2] | [1011 cm-2] | [1013 cm-2] | [1014 cm-2] | [1011 cm-2] | |
|
|
||||||
| IRDC 18102-1800 MM1 | 1.4 ± 0.1 | 30.1 ± 13.3 | 4.9 | 1.9 ± 1.0 | 9.7 ± 5.1 | 1.9 ± 0.9 |
| G015.05+00.07 MM1 | 1.2 ± 0.1 | 3.3 ± 0.6 | 9.2 | 0.1 ± 0.03 | 0.5 ± 0.2 | 3.0 ± 0.6 |
| IRDC 18151-1208 MM2 | 2.1 ± 0.1 | 5.0 ± 1.1a | 5.2 | 0.5 ± 0.1 | 2.6 ± 0.5 | 8.2 ± 1.9 |
| G015.31-00.16 MM3 | 0.3 ± 0.1 | 3.8 ± 0.6 | ... | 0.3 ± 0.04 | 1.5 ± 0.2 | 11.0 ± 2.1 |
| IRDC 18182-1433 MM2 | 0.7 ± 0.1 | 2.1 ± 0.4a | ... | 0.7 ± 0.1 | 3.2 ± 0.5 | 45.4 ± 5.4 |
| IRDC 18223-1243 MM3 | 1.2 ± 0.1 | 5.1 ± 0.5a | 6.7 | 0.4 ± 0.1 | 1.9 ± 0.5 | 6.6 ± 0.9 |
| ISOSS J18364-0221 SMM1 | 1.1 ± 0.1 | ... | ... | 0.6 ± 0.2 | 3.3 ± 1.1 | 39.2 ± 13.8 |
|
|
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| x(C17O) | x(N2H+) | x(N2D+) | x(H13CO+) | x(HCO+) | x(DCO+) | |
| [10-7] | [10-9] | [10-11] | [10-10] | [10-8] | [10-11] | |
|
|
||||||
| IRDC 18102-1800 MM1 | 1.5 ± 0.2 | 27.7 ± 12.6 | 5.0 ± 0.5 | 18.2 ± 9.8 | 9.3 ± 5.0 | 2.0 ± 1.0 |
| G015.05+00.07 MM1 | 1.2 ± 0.2 | 3.4 ± 0.9 | 9.5 ± 1.7 | 1.0 ± 0.4 | 0.5 ± 0.2 | 3.1 ± 0.8 |
| IRDC 18151-1208 MM2 | 0.6 ± 0.1 | 0.9 ± 0.2 | 1.3 ± 0.2 | 1.2 ± 0.3 | 0.6 ± 0.1 | 2.3 ± 0.6 |
| G015.31-00.16 MM3 | 0.4 ± 0.2 | 4.5 ± 1.6 | ... | 3.5 ± 1.2 | 1.8 ± 0.6 | 13.0 ± 4.8 |
| IRDC 18182-1433 MM2 | 1.1 ± 0.2 | 2.5 ± 0.6 | ... | 9.9 ± 2.1 | 4.5 ± 1.0 | 72.8 ± 14.6 |
| IRDC 18223-1243 MM3 | 0.9 ± 0.1 | 3.7 ± 0.5b | 4.9 ± 0.5 | 2.9 ± 0.8 | 1.4 ± 0.4 | 4.8 ± 0.8 |
| ISOSS J18364-0221 SMM1 | 1.6 ± 0.1 | ... | ... | 7.3 ± 2.4 | 4.0 ± 1.3 | 58.7 ± 20.7 |
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