Table A.1
Spectral line cube information.
| Molecule | Transition | Rest Frequency (νrest) [GHz] | Upper Energy Level (Eup) [K] | Critical Density (ncrit) [104 cm−3] | Beam [arcsec] | RMS [K] |
|---|---|---|---|---|---|---|
| SO | 22−11 | 86.0940 | 19.3 | … | 2.21 | 0.08 |
| H13CN | 1–0 | 86.3399 | 4.1 | 25 | 2.72 | 0.09 |
| H13CO+ | 1–0 | 86.7543 | 4.2 | 4.1 | 2.69 | 0.09 |
| SiO | 2–1 | 86.8470 | 6.3 | 10 | 2.69 | 0.09 |
| HN13C | 1–0 | 87.0909 | 4.2 | … | 2.69 | 0.08 |
| HNCO | 4–3 | 87.9252 | 10.5 | 2.1 | 2.81 | 0.24* |
| CS | 2–1 | 97.9810 | 7.1 | 10 | 2.21 | 0.09 |
| HC3N | 11–10 | 100.0763 | 28.8 | 16 | 2.17 | 0.07 |
Notes. This table lists the rest frequencies, upper energy levels (taken from Splatalogue; Remijan et al. 2007), and critical densities (taken from Table 2 of Barnes et al. 2020a, or Table 1 of Shirley 2015; both assume a kinetic temperature of 20 K) of the spectral line transitions, as well as the circularised beam sizes and the RMS values of the corresponding cubes. The table is sorted by increasing frequency. Note the HNCO cube used throughout this study has a velocity resolution of 0.5 km s−1, whereas the remaining cubes have a resolution of 3 km s−1. Consequently, the noise level in the HNCO cube is higher than that observed in the remaining cubes.
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