Table 5
Temperatures (K) derived from the RTD analysis and the Weeds or CASSIS (CH3OH) model.
| IRAS 20126+4104 | IRAS 18089-1732 | G31.41+0.31 | ||||
|
|
||||||
| RTD | Model | RTD | Model | RTD | Model | |
|
|
||||||
| warm species | ||||||
|
|
||||||
| H2CO | 123 ± 21 | 150 | 204 ± 82 | (150) | 157 ± 44 | (150) |
| CH3OH | 122 ± 17 | 300, 14 ± 1 | 291 ± 37 | 300, 15 ± 2 | 323 ± 34 | 200, 14 ± 2 |
| C2H5OH | – | (100) | 85 ± 18 | 150 | 120 ± 15 | 100 |
| HNCO | – | (200) | 92 ± 25 | 200 | 111 ± 32 | 200 |
| NH2CHO | – | 300 | 72 ± 28 | 100 | 94 ± 50 | 300 |
| CH3CN | 217 ± 352 | (200) | [346 ± 106] | (200) | [311 ± 68] | (300) |
| C2H5CN | – | (80) | 84 ± 33 | 80 | 105 ± 23 | 80 |
| HCOOCH3 | – | (200) | 118 ± 20 | 200 | 174 ± 11 | 300 |
| CH3OCH3 | – | (100) | 66 ± 11 | 100 | 90 ± 6 | 100 |
|
|
||||||
| cold species | ||||||
|
|
||||||
| CH2CO | – | (50) | 71 ± 11 | 50 | 97 ± 101 | 50 |
| CH3CHO | – | (50) | – | (50) | – | 50 |
| HCOOH | – | (40) | – | (40) | – | 40 |
| CH3CCH | 40 ± 10 | 35 | 46 ± 12 | 40 | 67 ± 14 | 80 |
Notes.The species are classified warm and cold according to BIS07. Square bracketed values are Trot values for optically thick species and round bracketed values are Tex values assumed based on temperatures derived from the other sources in this study. – Means not enough lines were detected for a rotation diagram. Typical uncertainties in the Weeds excitation temperatures are ±50 K.
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