Table 1
Column densities and excitation temperatures for B1-c and S68N in a 0.45′′ beam.
| B1-c | S68N | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Species | Catalogue | Tex (K) | N (cm−2) | N/CH3OH (%) | N∕HNCO (%) | Tex (K) | N (cm−2) | N/CH3OH (%) | N∕HNCO (%) |
| HNCO | CDMS | – | (1.6 ± 0.7) × 1016 | 0.9 ± 0.5 | ≡ 100.0 | – | ~1.2 × 1016 | 0.9 ± 0.4 | ≡ 100.0 |
| HN13CO | JPL | 200 ± 100* | (2.4 ± 1.1) × 1014 | 0.013 ± 0.007 | ≡ 1.47 | [200]* | ~1.8 × 1014 | 0.013 ± 0.005 | ≡ 1.47 |
| DNCO | JPL | [200]* | (3.0 ± 0.2) × 1014 | 0.016 ± 0.005 | 1.8 ± 0.8 | [200] | <6.8 × 1013 | <0.005 | <0.6 |
| NH2CHO | JPL | >70 | (5.1 ± 2.4) × 1014 | 0.03 ± 0.02 | 3.1 ± 2.1 | [200]* | (2.7 ± 0.3) × 1014 | 0.019 ± 0.009 | 2.2 ± 0.3 |
| C2H5CN | CDMS | 275 ± 125 | (1.1 ± 0.3) × 1015 | 0.06 ± 0.02 | 6.5 ± 3.5 |  |
(1.1 ± 0.6) × 1015 | 0.08 ± 0.05 | 8.9 ± 4.7 |
| CH3CN | CDMS | – | (7.4 ± 2.2) × 1015 | 0.4 ± 0.2 | 45.5 ± 24.9 | – | (2.9 ± 1.0) × 1015 | 0.2 ± 0.1 | 23.6 ± 8.3 |
| CH2DCN | CDMS |  |
(2.6 ± 0.2) × 1014 | 0.014 ± 0.004 | 1.6 ± 0.7 |  |
(1.0 ± 0.2) × 1014 | 0.007 ± 0.003 | 0.8 ± 0.2 |
| CHD2CN | CDMS | >200 | (1.4 ± 0.2) × 1014 | 0.007 ± 0.003 | 0.9 ± 0.4 | [200] | <3.8 × 1013 | <0.003 | <0.3 |
| NH2CN | JPL | [200] | <7.1 × 1013 | <0.004 | <0.4 | [200] | <1.0 × 1013 | <0.0007 | <0.1 |
| CH3NCO | CDMS | [200] | <8.8 × 1014 | <0.05 | <5.4 | [200] | <3.8 × 1014 | <0.03 | <3.1 |
| CH3NH2 | JPL | [200] | <5.1 × 1015 | <0.3 | <31.5 | [200] | <1.9 × 1015 | <0.1 | <15.6 |
| HOCH2CN | CDMS | [200] | <2.0 × 1015 | <0.1 | <12.2 | [200] | <6.4 × 1014 | <0.05 | <5.3 |
Notes. Band 5 and 6 data are used to fit B1-c, and Band 6 data are used to fit S68N parameters. The column densities for CH3OH are taken from van Gelder et al. (2020), who use the optically thin isotopologue CH
OH to determine the column density of CH3OH. The square brackets around the Tex values indicate the molecules for which the temperature was fixed. The column densities for HNCO and CH3CN are found from HN13CO and CH2DCN as their main isotopologues are optically thick. Species with a tentative detection are indicated by a star next to their excitation temperatures.
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