Open Access
Table 1.
Detected HDO and 
transitions toward the L1551 IRS5 source.
| Molecule | Transition | Frequency | Eup | Aij | gup | Beam size | PA | rms | dv | Project |
|---|---|---|---|---|---|---|---|---|---|---|
| [MHz] | [K] | [s−1] | [″ × ″] | [°] | [mJy beam−1] | [km s−1] | ||||
| HDO | 31, 2–22, 1 | 225 896.72 | 168 | 1.3 × 10−5 | 7 | 0.76 × 0.51 | 21.7 | 4.2 | 0.5 | W18AO |
 |
31, 3–22, 0 | 203 407.52 | 204 | 4.8 × 10−6 | 7 | 0.83 × 0.57 | 24.0 | 3.7 | 0.5 | W18AO |
| HDO | 42, 2–42, 3 | 143 727.21 | 319 | 2.8 × 10−6 | 9 | 2.51 × 2.05 | 37.1 | 2.1 | 4.0 | S16AE |
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