Table 3
Transition properties from the Cologne Database for Molecular Spectroscopy (CDMS) (Endres et al. 2016).
| Species | Transition | Frequency | Eup | Aij | Sources |
|---|---|---|---|---|---|
| (MHz) | (K) | (s−1) | |||
| HNCO (1) | 100,10–90,9 | 219 798.27 | 58.0 | 1.47 × 10−4 | G24 |
| HNCO (2) | 101,9–91,8 | 220 584.75 | 101.5 | 1.45 × 10−4 | G17, G345 |
| HNCO (3) | 103,7–93,6 | 219 656.77 | 432.9 | 1.20 × 10−4 | G24, G345 |
| NH2CHO (1) | 101,9–91,8 | 218 459.21 | 60.8 | 7.47 × 10−4 | G17, G345 |
| NH2CHO (2) | 112,10–102,9 | 232 273.64 | 78.9 | 8.81 × 10−4 | G24 |
| H2CO (1) | 30,3–20,2 | 218 222.19 | 20.9 | 2.82 × 10−4 | G17, G24, G345 |
| H2CO (2) | 32,2–22,1 | 218 475.63 | 68.1 | 1.57 × 10−4 | G17, G24, G345 |
| H2CO (3) | 32,1–22,0 | 218 760.07 | 68.1 | 1.58 × 10−4 | G17, G24, G345 |
Notes. The last column shows the sources in which this transition appeared. HNCO (3) has a much higher upper energy level than the other transitions, so we consider it cautiously. The CDMS catalog can be accessed here: https://cdms.astro.uni-koeln.de/
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