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Table 7
Comparison of HDO fractional abundance between different sources.
| Source | XHDO(best fit) |
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| Inner | outer | Inner | outer | |||
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| High-mass hot cores | ||||||
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| G34.26+0.15 | 6 × 10−8a | 5 × 10−12a | 3 × 10-4a | 1.9 × 10−4a−4.9 × 10-4a | 0.01h | 0.001h |
| AFGL 2591 | 1 × 10−7b | 4 × 10−9b | 5 × 10-4b | 0.4−4 × 10-3b | ... | ... |
| W33A | 2 × 10-7b | 1 × 10-8b | 7 × 10−3b | ... | ... | |
| Orion KL | ... | ... | 2 × 10-2c | 0.14d | 0.005–0.02k | |
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| Low-mass protostars | ||||||
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| NGC 1333 IRAS2A | 8 × 10−8e | 7 × 10−10e | ≥ 1 × 10-2e |
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0.17 |
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| IRAS 16293-2422 | 1 × 10−7g | 1.5 × 10−10g | 3 × 10-2g | ≤ 2 × 10-3(3σ)g | 0.15 ± 0.07f | 0.013m |
| 1.7 × 10−7i | 8 × 10−11i | 3.4 × 10−2i | 5 × 10−3i | |||
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