Table 3
Molecular column density ratios.
| Source | NH3/HC5N | NH3/c-C3H2 | c-C3H2/HC5N | c-C3HD/c-C3H2 | HC3N/HC5N | CCS/HC5N | CCS/C3S |
|---|---|---|---|---|---|---|---|
| HOPS–108 | 700 | 130 | 5.4 | 0.08a | 5.0 | 0.27a | − |
| HOPS–373 | − | 75 | − | 0.13a | − | − | − |
| Vela C IRS 31 14 | 1600 | 140 | 12 | 0.08a | 4.2 | 2.4 | 4.8 |
| BHR71–IRS1 | 220 | 15 | 15 | 0.11a | 4.8 | 1.2 | 1.3 |
| G300.91+0.88 | 12 000 | 830 | 14 | 0.04a | 5.4 | 3.0 | 3.1 |
| G304.76+1.34 | 11 000 | 810 | 14 | 0.06a | 4.0 | 3.2 | 4.1 |
| G309.91+0.32 | 6200 | 760 | 8.2 | 0.16a | 4.6 | 1.8 | 2.9 |
| Cha MMS1 | 1000 | 120 | 8.3 | 0.22 | 4.6 | 3.8 | 5.6 |
| Cha C2 | 1200 | 170 | 7.1 | 0.24 | 3.7 | 6.8 | 5.4 |
| TMC-1 | 8.5 | 26 | 0.32 | 0.28 | 3.9 | 1.7 | 7.1 |
| G300.91+0.88 | 1890 | 105 | 18 | 0.04a | 6.7 | 4.2 | 3.9 |
| G304.76+1.34 | 1650 | 85 | 20 | 0.07a | 5.6 | 5.1 | 5.2 |
| G309.91+0.32 | 1210 | 210 | 10 | 0.17a | 5.7 | 2.3 | 3.3 |
Notes. Entries in the table are source and selected molecular column density ratios based on column densities reported in Table 2. a3σ upper limit. Chamaeleon and TMC-1 values are from Lis et al. (2025). The bottom three lines show revised column density ratios for G300.91+0.88, G304.76+1.34, and G309.91+0.32 assuming a higher excitation temperature of 7.0 K, as described in the text.
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