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Table 8
Abundance ratios of the deuterated molecule to the non-deuterated molecule and inferred D/H ratios in the observed Class I sources.
| L1489-IRS | B5-IRS1 | L1455-IRS1 | L1551-IRS5 | |||||
|---|---|---|---|---|---|---|---|---|
| Abundance | D/H | Abundance | D/H | Abundance | D/H | Abundance | D/H | |
| (%) | (%) | (%) | (%) | (%) | (%) | (%) | (%) | |
| D2CO/H2CO | 0.8–1.8 (E) | 9–13 | 6–30 (E) | 24–55 | 8–28 (E) | 28–53 | 20–70 (E) | 45–84 |
| CH2DOH/CH3OH | – | – | 20–70 (E) | 6–23 | 4–7 (E) | 1–2 | ≤3 (E) | ≤1 |
| 2–10 H | 0.7–3 | |||||||
| HDCS/H2CS | – | – | – | – | 18–27 (E) | 9–14 | 10–30 (E) | 5–15 |
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