Table 1
Summary of the molecular transitions studied here.
| Molecule | Quantum number | Frequency | Log10 Aij | Eup∕k |  |
Database |
|---|---|---|---|---|---|---|
| (GHz) | (s−1) | (K) | (cm−3) | |||
| CH3OH − A vt = 0 | 2−2−3−1 | 335.13369 | − 4.57 | 45 | 1.1 × 107 | CDMS |
| CH3OH − A vt = 0 | 71−61 | 335.58200 | − 3.29 | 79 | 3.6 × 107 | CDMS |
| CH3OH − A vt = 0 | 147−156 | 336.43822 | − 4.25 | 488 | 6.7 × 105 | CDMS |
| CH3OH − A vt = 0 | 12−1−120 | 336.86511 | − 2.84 | 197 | 1.0 × 108 | CDMS |
| CH3OH − E vt = 0 | 33−42 | 337.13587 | − 4.61 | 62 | 6.9 × 107 | CDMS |
| CH3OH − E vt = 1 | 30–21 | 334.42656 | − 4.26 | 315 | CDMS | |
| CH3OH − A vt = 2 | 71−61 | 336.60589 | − 3.79 | 747 | JPL | |
13CH3OH − A  |
12−1–120 | 335.56021 | − 3.40 | 193 | 1.0 × 108 | CDMS |
13CH3OH − A  |
14−1–140 | 347.18828 | − 3.39 | 254 | 6.9 × 106 | CDMS |
HC3N  |
37–36 | 336.52008 | − 2.52 | 307 | CDMS | |
| HC3N v7 = 1e | 38–37 | 346.45573 | − 2.48 | 645 | CDMS | |
| SO2 v = 0 | 82,6−71,7 | 334.67335 | − 3.26 | 43 | 7.1 × 107 | JPL |
| CO | 3−2 | 345.79599 | −3.61 | 33 | 4.00 × 104 | CDMS |
Notes. (a)Calculated at T = 100 K using collisional rate coefficients from the LAMDA database (Schöier et al. 2005), where available. (b)For HC3 N, the molecular datafile lists cross sections up to Jup = 21, and T = 80 K. (c)Calculated from the collisional rate coefficients of the main isotopologue.
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