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Table 3
Synopsis of the derived CH and CD column densities and D/H ratios.
| Source | υmin− υmax | N(CH) | N(CD) | D/H ratio | ||||
|---|---|---|---|---|---|---|---|---|
| (km s−1) | (1013 cm−2) | (1012 cm−2) | CH | HCO+ | C2H | H2CO | HCN | |
| IRAS 16293–2422 | 3.2 4.7 | 7.71 ± 0.25 | 1.25 ± 0.31 | 0.016 ± 0.003 | 0.0086(a) | 0.18(a) | 0.14(a) | 0.013(a) |
| W49 N | −5.0-25.0 | 22.87 ± 3.60 | <6.85 | ≤0.03 | ≤0.0004(b) | – | – | 0.001(b) |
Notes. (a) Values taken from van Dishoeck et al. (1995). (b)Values taken from Roberts et al. (2011).
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