Table 2
Spectral setup and parameters of the detected molecular transitions.
| Molecular transition | Frequency (a) | Aij (a) | Eu (a) | ncrit (b) |
|---|---|---|---|---|
| (GHz) | (s−1) | (K) | (cm−3) | |
| C17O J = 3−2 | 337.06110 | 2.3 × 10−6 | 32 | 3.5 × 104 |
| C34S J = 7−6 | 337.39646 | 8.4 × 10−4 | 50 | 1.3 × 107 |
SO2  |
338.30599 | 3.3 × 10−4 | 197 | 5.9 × 107 |
| CH3OH JK = 7−1 − 6−1 E | 338.34463 | 1.7 × 10−4 | 70 | 2.0 × 106 |
| CH3OH JK = 70 − 60 A+ | 338.40868 | 1.7 × 10−4 | 65 | 2.8 × 107 |
| H13CO+ J = 4−3 | 346.99835 | 3.3 × 10−3 | 42 | 8.5 × 106 |
| C2H N = 4−3, J = 9/2−7/2, F = 5−4 | 349.33774 | 1.3 × 10−4 | 42 | 2.2 × 107 |
| C2H N = 4−3, J = 9/2−7/2, F = 4−3 | 349.39934 | 1.3 × 10−4 | 42 | 2.3 × 107 |
Notes. (a) Values from the CDMS database (Müller et al. 2001). (b)Calculated values for a kinetic temperature of 30 K and collisional rates from the Leiden Atomic and Molecular Database (LAMDA; Schöier et al. 2005). The collisional rates of specific species were taken from the following sources: C17O from Yang et al. (2010), C34S from Lique et al. (2006), SO2 from Balança et al. (2016), CH3OH from Rabli & Flower (2010), H13CO+ from Flower (1999), and C2H from Spielfiedel et al. (2012).
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