Table 3
Methanol rotational and derived kinetic temperatures.
| UT date | Freq. range | Linesa | Trot | Tgas |
|---|---|---|---|---|
| (mm/dd.dd) | (GHz) | (K) | (K) | |
| 01/23.81 | 241–244b | 10 | 17.9 ± 2.4 | ≥25 |
| 01/24.01 | 165 | 7 | 19.2 ± 3.9 | 21.3 ± 4.0 |
| 01/24.2 | 254–267 | 4 | 18.5 ± 2.5 | 18.6 ± 2.6 |
| 01/24/2 | 251–252 | 6 × 2 | 21.8 ± 7.1 | 24.2 ± 7.9 |
| 01/24.78 | 213–230 | 6 | 20.7 ± 3.0 | 20.6 ± 3.0 |
Notes. (a) Number of lines used for the determination of Trot. Since the weighting is done according to the S/N of individual lines, if we take into account the lines below the formal detection threshold of 3 − σ, the derived Trot is not significantly changed. (b)These lines are more sensitive to the collision rate than to the gas temperature itself: for a larger collision rate, the inferred Tgas would be lower.
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