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Table 9
Abundance ratios.
| # | Source | HDO/H2O | H2O |
| × 10-4 | × 10-8 | ||
|
|
|||
| 2 | IRAS 18089 − 1732 | 33 | 4.0 |
| 6 | W43-MM1 | 7 | 230 |
| 7 | DR21(OH) | 19 | 4.3 |
|
|
|||
| a | W3 IRS5 | 13 | 30 |
| c | W33A | 30 | 80 |
| e | AFGL 2591 | 3 | 40 |
| f | NGC 7538 IRS1 | 38 | 50 |
Notes. Table presents HDO/H2O ratios and water abundance
derived from H
O. Values in the bottom part are taken from radiative
transfer model results and HO column densities of van der Tak et al. (2006).
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