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Table 5
H2O isotopologue peak fractional abundances with respect to H2, f0, from model results.
| IK Tau | R Dor | W Hya | R Cas | ||
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| o-H217O | (2.9 ± 1.0) × 10-7 | (3.4 ± 0.8) × 10-7 | (3.7 ± 0.9) × 10-7 | (5.0 ± 1.4) × 10-7 | |
| p-H217O | (3.8 ± 0.9) × 10-8 | (4.8 ± 1.1) × 10-8 | (6.9 ± 1.7) × 10-8 | ≤ 3 × 10-8 | |
| o-H218O | (4.2 ± 1.2) × 10-7 |
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(2.5 ± 0.9) × 10-6 |
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| p-H218O | (1.5 ± 0.4) × 10-7 | (1.6 ± 0.4) × 10-7 |
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(1.0 ± 0.3) × 10-7 | |
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| o-H216O* | 3.5 × 10-4 | 2 × 10-4 | 6 × 10-4 | 6 × 10-5 | |
| p-H216O* | 7 × 10-5 | 5 × 10-5 | 3 × 10-4 | 2 × 10-5 | |
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| o-H217O/o-H218O | 0.69 ± 0.31 | 0.54 ± 0.26 | 0.15 ± 0.07 | † | |
| p-H217O/p-H218O | 0.25 ± 0.09 | 0.30 ± 0.10 | 0.17 ± 0.09 | ≤ 0.30 ± 0.09 | |
| o-H216O/o-H217O | 1210 | 588 | 1620 | † | |
| p-H216O/p-H217O | 1840 | 1040 | 4350 | ≥ 667 | |
| o-H216O/o-H218O | 833 | 317 | 240 | 214 | |
| p-H216O/p-H218O | 466 | 313 | 750 | 200 | |
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| OPR (H217O) | 7.6 ± 3.2 | 7.1 ± 2.3 | 5.4 ± 1.9 | † | |
| OPR (H218O) | 2.8 ± 1.1 | 3.9 ± 1.8 | 6.3 ± 3.9 | 2.8 ± 2.2 | |
Notes. See text for details.
(*)
H216O abundances taken from Maercker et al. (2016) for IK Tau, R Dor and R Cas, and from Khouri et al. (2014b) for W Hya.
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