Table A.1.
Spectroscopic parameters for transitions of H2O and CH isotopologs observed in this study.
| Species | Transition | Rest Freq. | Redshifted Freq. | Sul | Elow |
|---|---|---|---|---|---|
| (GHz) | (GHz) | (K) | |||
| ortho-H2O | JKa, Kc = 11, 0 − 10, 1 | 556.9359877 | 295.328 | 4.5 | 0.0 |
ortho-H O |
JKa, Kc = 11, 0 − 10, 1 | 547.676440 | 290.418 | 4.5 | 0.0 |
ortho-H O |
JKa, Kc = 11, 0 − 10, 1 | 552.020960 | 292.722 | 4.5 | 0.0 |
| CH | (Jp, F) = (3/2+, 1)−(1/2−, 1) | 532.7215886 | 282.488 | 0.17 | 0.2 |
| (Jp, F) = (3/2+, 2)−(1/2−, 1) | 532.7238893 | 282.489 | 0.83 | 0.2 | |
| (Jp, F) = (3/2+, 1)−(1/2−, 0) | 532.7932746 | 282.526 | 0.33 | 0.2 | |
| (Jp, F) = (3/2−, 2)−(1/2+, 1) | 536.7610463 | 284.630 | 0.83 | 0.0 | |
| (Jp, F) = (3/2−, 1)−(1/2+, 1) | 536.7818563 | 284.641 | 0.17 | 0.0 | |
| (Jp, F) = (3/2−, 1)−(1/2+, 0) | 536.7955695 | 284.648 | 0.33 | 0.0 | |
| 13CH | (Jp, F1, F) = (3/2+, 1, 1/2)−(1/2−, 1, 3/2) | 531.859975 | 282.031 | 0.04 | 0.2 |
| (Jp, F1, F) = (3/2+, 1, 3/2)−(1/2−, 1, 3/2) | 531.862711 | 282.033 | 0.19 | 0.2 | |
| (Jp, F1, F) = (3/2+, 1, 1/2)−(1/2−, 1, 1/2) | 531.910901 | 282.058 | 0.05 | 0.2 | |
| (Jp, F1, F) = (3/2+, 1, 3/2)−(1/2−, 1, 1/2) | 531.913471 | 282.060 | 0.07 | 0.2 | |
| (Jp, F1, F) = (3/2+, 2, 3/2)−(1/2−, 1, 3/2) | 532.083360 | 282.150 | 0.11 | 0.2 | |
| (Jp, F1, F) = (3/2+, 2, 5/2)−(1/2−, 1, 3/2) | 532.086251 | 282.151 | 1.00 | 0.2 | |
| (Jp, F1, F) = (3/2+, 2, 3/2)−(1/2−, 1, 1/2) | 532.134740 | 282.177 | 0.55 | 0.2 | |
| (Jp, F1, F) = (3/2+, 1, 1/2)−(1/2−, 0, 1/2) | 532.224939 | 282.225 | 0.25 | 0.1 | |
| (Jp, F1, F) = (3/2+, 1, 3/2)−(1/2−, 0, 1/2) | 532.227528 | 282.226 | 0.41 | 0.1 | |
| (Jp, F1, F) = (3/2+, 2, 3/2)−(1/2−, 0, 1/2) | 532.448670 | 282.343 | 0.01 | 0.1 | |
| (Jp, F1, F) = (3/2−, 1, 3/2)−(1/2+, 0, 1/2) | 536.005094 | 284.229 | 0.49 | 0.0 | |
| (Jp, F1, F) = (3/2−, 1, 1/2)−(1/2+, 0, 1/2) | 536.024969 | 284.240 | 0.17 | 0.0 | |
| (Jp, F1, F) = (3/2−, 1, 3/2)−(1/2+, 1, 3/2) | 536.026643 | 284.241 | 0.17 | 0.0 | |
| (Jp, F1, F) = (3/2−, 1, 3/2)−(1/2+, 1, 1/2) | 536.037944 | 284.247 | 0.01 | 0.0 | |
| (Jp, F1, F) = (3/2−, 1, 1/2)−(1/2+, 1, 3/2) | 536.046477 | 284.251 | 0.04 | 0.0 | |
| (Jp, F1, F) = (3/2−, 1, 1/2)−(1/2+, 1, 1/2) | 536.057826 | 284.257 | 0.13 | 0.0 | |
| (Jp, F1, F) = (3/2−, 2, 3/2)−(1/2+, 0, 1/2) | 536.099484 | 284.279 | 0.01 | 0.0 | |
| (Jp, F1, F) = (3/2−, 2, 5/2)−(1/2+, 1, 3/2) | 536.101144 | 284.280 | 1.00 | 0.0 | |
| (Jp, F1, F) = (3/2−, 2, 3/2)−(1/2+, 1, 3/2) | 536.121035 | 284.291 | 0.13 | 0.0 | |
| (Jp, F1, F) = (3/2−, 2, 3/2)−(1/2+, 1, 1/2) | 536.132344 | 284.297 | 0.53 | 0.0 | |
Notes. Sky frequencies are calculated for z = 0.88582. For H2O, the frequency is taken from Cazzoli et al. (2009). For CH, frequencies are taken from Truppe et al. (2014) and line relative intensities (Sul) from de Nijs et al. (2012). Each rotational J-level is split into two opposite parity states (p = +, −) by Λ-doubling. The hydrogen nuclear spin (I = 1/2) further splits each level into hyperfine components F = J + I. For 13CH, spectroscopic data are taken from Halfen et al. (2008) and the JPL molecular spectroscopy database. Both nuclei have spin angular momentum. J couples with the 13C spin (I1 = 1/2) F1 = J + I1. Then, F1 couples with the hydrogen spin (I2 = 1/2): F = F1 + I2.
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