Free Access
Table 1
Observed H2CO, 
, HDCO,
and D2CO lines.
| Frequency | Transition | El | Aul | Symmetry |
| (MHz) | (K) | (s-1) | ||
|
|
||||
| H2CO (o/p = 3) | ||||
| 218 222.19 | 30,3−20,2 | 10.6 | 2.8 × 10-4 | para |
| 218 475.63 | 32,2−22,1 | 57.6 | 1.6 × 10-4 | para |
| 218 760.07 | 32,1−22,0 | 57.6 | 1.6 × 10-4 | para |
| 225 697.78 | 31,2−21,1 | 22.6 | 2.8 × 10-4 | ortho |
(o/p = 3) |
||||
| 219 908.52 | 31,2−21,1 | 22.4 | 2.6 × 10-4 | ortho |
| HDCO | ||||
| 227 668.45 | 11,1−00,0 | 0.0 | 1.7 × 10-6 | |
| 246 924.60 | 41,4−31,3 | 25.8 | 4.0 × 10-4 | |
| D2CO (o/p = 2) | ||||
| 221 191.66 | 41,4−31,3 | 21.3 | 2.9 × 10-4 | para |
| 231 410.23 | 40,4−30,3 | 16.8 | 2.8 × 10-4 | ortho |
| 233 650.44 | 42,3−32,2 | 38.4 | 2.7 × 10-4 | ortho |
| 234 293.36a | 43,2−33,1 | 65.4 | 1.6 × 10-4 | para |
| 234 331.06a | 43,1−33,0 | 65.4 | 1.6 × 10-4 | para |
| 245 532.75 | 41,3−31,2 | 23.1 | 3.9 × 10-4 | para |
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