Table 2
Parameters of the observed lines.
| Molecule | Transition | Frequency (MHz) | θHPBW (″) (1) | ηmb (1) |
|---|---|---|---|---|
| C18O | 1→0 | 109782.1734 | 22 | 0.79 |
| o-H2S | 11,0 → 10,1 | 168762.7624 | 15 | 0.70 |
| N2H+ | 1→0 | 93173.3977 | 26 | 0.81 |
| OCS | 9→8 | 109463.0630 | 22 | 0.79 |
| CH3 OH (2) | A+ 10,1 → O0,0 | 48372.4600 | 36 | 0.49 |
| CH3OH | E2 21,2 → 11,1 | 96739.3580 | 25 | 0.80 |
| CH3OH | A+ 20,2 → 10,1 | 96741.3710 | 25 | 0.80 |
| CH3OH | E1 20,2 → 10,1 | 96744.5450 | 25 | 0.80 |
Notes. (1)Yebes 40 m and IRAM 30 m telescope efficiencies taken from the Yebes 40 m technical information webpage (measurements taken in 2020) and IRAM 30 m efficiencies wiki, respectively. (2) Observed with the 40 m Yebes telescope only toward Barnard 1b. The rest of the lines were observed with the IRAM 30 m telescope.
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