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Table 1
Spectral tracers used in this study, and observed with the IRAM-30 m telescope.
| Line | Frequency | FWHM | log(n(H2)) | Ref. |
| (J = 1−0) | ( GHz) | (km s-1) | (cm-3) | |
|
|
||||
| 12CO | 115.271202 | 4.08 ± 0.04 | 2.17 ± 0.3 | 1 |
| HCO+ | 89.188525 | 3.91 ± 0.08 | 2.34 ± 0.3 | 1 |
| 13CO | 110.201354 | 2.97 ± 0.03 | 2.65 ± 0.3 | 1 |
| C18O | 109.782173 | 2.55 ± 0.01 | 3.60 ± 0.15 | 2 |
| N2H+ | 93.173764 | 1.79 ± 0.10 | 4.10 ± 0.3 | 3 |
Notes. The linewidths are derived from these observations, the typical densities from these observations (Ref. 1) or other works (Ref. 2: Hily-Blant et al. 2005, Ref. 3: Kirk et al. 2016).
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