Table 2
Line parameters and fitting results for the detected species.
| Molecule | Rest. frequency | V0 (LSR) | ΔV | Sl | Sc | rms | τ | N |
|---|---|---|---|---|---|---|---|---|
| GHz | (km s−1) | (km s−1) | Jy | Jy | mJy | (cm−2) | ||
| c–C3H2 | 85.34 | –1.0 (0.2) | 18.6a | –0.06615 | 0.6195 | 1.244 | 0.113 (0.012) | 1.362(0.400) × 1013 |
| –153.1 (2.2) | 15.0a | –0.00925 | 0.6195 | 1.244 | 0.015 (0.002) | 1.464(0.512) × 1012 | ||
| –191.9 (2.1) | 12.0a | –0.00583 | 0.6195 | 1.244 | 0.009 (0.001) | 7.362(3.261) × 1011 | ||
| H13CN | 86.34 | –2.0 (2.8) | 26.7 (6.3) | –0.00535 | 0.6165 | 1.228 | 0.009 (0.001) | 4.860(1.395) × 1011 |
| – | – | – | ||||||
| – | – | – | ||||||
| HCOb | 86.71 | –0.2 (0.8) | 19.7 (0.5) | –0.01175b | 0.6238 | 1.244 | 0.019 (0.002) | 4.117(4.220) × 1012 |
| – | ||||||||
| – | ||||||||
| H13CO+ | 86.75 | 0.2 (1.3) | 22.7 (3.8) | –0.0101 | 0.62429 | 1.095 | 0.016 (0.002) | 4.538(0.882) × 1011 |
| – | – | |||||||
| – | – | |||||||
| SiO | 86.85 | 2.4 (2.4) | 22.7 (7.2) | –0.00965 | 0.62401 | 1.103 | 0.016 (0.002) | 1.283(0.427) × 1012 |
| CCHb | 87.33 | –1.6 (0.8) | 18.499 (2.6) | –0.11309 | 0.62660 | 1.260 | 0.199 (0.021) | 2.744(0.480) × 1014 |
| –154.4 (1.5) | 26.680 (4.6) | –0.01248 | 0.62660 | 1.260 | 0.020 (0.002) | 4.000(0.795) × 1013 | ||
| HCN | 88.63 | 0.5 (0.1) | 21.0 (0.1) | –0.39488 | 0.65866 | 2.953 | 0.915 (0.052) | 3.907(0.224) × 1013 |
| –154.2 (0.4) | 10.8 (1.1) | –0.08517 | 0.65866 | 2.953 | 0.138 (0.014) | 3.039(0.438) × 1012 | ||
| –193.3 (1.2) | 10.3 (2.0) | –0.03140 | 0.65866 | 2.953 | 0.049 (0.005) | 1.023(0.222) × 1012 | ||
| HCO+ | 89.19 | 0.7 (8.7) | 20.0a | –0.47096 | 0.66217 | 3.351 | 1.242 (0.058) | 2.936(0.747) × 1013 |
| –153.4 (8.7) | 10.6 (8.7) | –0.18489 | 0.66217 | 3.351 | 0.327 (0.029) | 4.114(3.386) × 1012 | ||
| –194.4 (8.7) | 10.0 (8.7) | –0.04435 | 0.66217 | 3.351 | 0.069 (0.007) | 8.170(0.717) × 1011 | ||
| HNC | 90.66 | 1.5 (0.4) | 22.5 (0.6) | –0.08730 | 0.66003 | 2.827 | 0.142 (0.014) | 6.061(0.641) × 1012 |
| –154.1 (0.5) | 8.7 (1.8) | –0.03176 | 0.66003 | 2.827 | 0.049 (0.005) | 8.160(1.863) × 1011 | ||
| – | – | – | ||||||
| CS | 97.98 | 3.9 (0.3) | 18.0a | –0.03808 | 0.64514 | 1.353 | 0.061 (0.007) | 9.423(2.817) × 1012 |
| –157.2 (0.9) | 10.0a | –0.01782 | 0.64514 | 1.353 | 0.028 (0.003) | 2.410(1.229) × 1012 | ||
| 13CO | 110.20 | 0.4 (0.1) | 8.1 (0.7) | –0.26448 | 0.54710 | 3.717 | 0.660 (0.045) | 6.334(0.694) × 1015 |
| CNb | 113.14 | 0 (0.1) | 14.7a | –0.11254c | 0.62611 | 3.890 | 0.198 (0.019) | 1.547(0.547) × 1014 |
| –156.0 (0.1) | 14.7a | –0.01906c | 0.62611 | 3.890 | 0.031 (0.004) | 2.413(0.890) × 1013 | ||
| – | – | <1.200 × 1013 |
Notes. V0 is the central velocity (local standard of rest; LSR) from a Gaussian fit, ΔV is the full width at half maximum of the Gaussian fit, Sl corresponds to the flux density peak of the absorption line, Sc is the continuum flux density, rms is the root mean square noise level of the spectrum for a ~ 10 km s−1 channel width, τ is the optical depth, and N is the column density. (a) Fixed parameter in the Gaussian fit. (b) Hyperfine structure. (c) Line intensity corresponds to the hyperfine component at 113.191 GHz.
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