Table 3
H2O isotopologue observations using PACS.
| Molecule | Transition | λ | Eup | θ | IK Tau | R Dor | W Hya | R Cas |
| [μm] | [K] | [′′] | [× 10-16 W m-2] | [× 10-16 W m-2] | [× 10-16 W m-2] | [× 10-16 W m-2] | ||
|
|
||||||||
| o-H217O | 22,1 → 21,2 | 180.33 | 114 | 13 | blend | x | 0.71 (30%) | 0.17 (46%) |
| 62,5 → 61,6 | 94.91 | 794 | 9 | 3.49 (25%) | blend | blend | blend | |
| o-H218O | 22,1 → 21,2 | 183.53 | 192 | 13 | 0.91 (29%) | x | x | x |
| 22,1 → 11,0 | 109.35 | 192 | 10 | 4.30 (26%) | 2.15 (53%) | x | 0.69 (45%) | |
| 61,6 → 50,5 | 82.44 | 641 | 9 | blend | blend | 2.25 (25%) | blend | |
| 33,0 → 22,1 | 67.19 | 406 | 9 | 2.66 (40%) | x | x | x | |
| 62,5 → 51,4 | 65.75 | 792 | 9 | 1.23 (61%) | x | x | x | |
| 43,2 → 32,1 | 59.35 | 546 | 9 | 2.88 (26%) | x | x | x | |
| p-H218O | 31,3 → 20,2 | 139.59 | 204 | 11 | 0.99 (38%) | x | x | x |
| 32,2 → 21,1 | 90.94 | 295 | 9 | 1.51 (26%) | x | 1.54 (50%) | x | |
Notes. Eup is the energy of the upper level in the transition, θ is the half power beam width of the telescope at the corresponding frequency. The integrated line strengths are given for each source and transition. (x) indicates a non-detection and numbers in brackets indicate percentage errors.
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