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Table 1.
Excitation temperature (Tex), column density (Ttot) and relative abundance determined relative to CH3CN for complex nitrogen bearing species in IRAS 16293B and IRAS 16293A.
| Molecule | Tex (K) | Ttot (cm−2) | Relative abundance |
|---|---|---|---|
| IRAS 16293A | |||
| CH3CN† | 120 (10) | 8.0 (1.0) × 1016 | 1 |
| 13CH3CN | 120 (10) | 1.0 (0.2) × 1015 | 0.013 |
| CH3 13CN | 120 (10) | 1.2 (0.2) × 1015 | 0.015 |
| CH3C15N | 120 (10) | 3.4 (0.2) × 1014 | 0.004 |
| CH2DCN | 120 (10) | 3.5 (0.5) × 1015 | 0.044 |
| CHD2CN | 120 (10) | 2.2 (0.5) × 1014 | 0.003 |
| C2H5CN | 140 (10) | 9.0 (0.2) × 1015 | 0.113 |
| C2H3CN | 150 (10) | ≤2.4 × 1014†† | ≤0.002†† |
| HC3N | 160 (20) | 4.4 (0.2) × 1014 | 0.006 |
| IRAS 16293B | |||
| CH3CN† | 110 (10) | 4.0 (1.0) × 1016 | 1 |
| 13CH3CN | 110 (10) | 6.0 (0.2) × 1014 | 0.015 |
| CH3 13CN | 110 (10) | 5.0 (0.2) × 1014 | 0.013 |
| CH3C15N | 110 (10) | 1.6 (0.2) × 1014 | 0.004 |
| CH2DCN | 110 (10) | 1.4 (0.2) × 1015 | 0.035 |
| CHD2CN | 110 (10) | 2.0 (0.2) × 1014 | 0.005 |
| C2H5CN | 110 (10) | 3.6 (0.2) × 1015 | 0.090 |
| C2H3CN | 110 (10) | 7.4 (0.2) × 1014 | 0.019 |
| HC3N | 100 (20) | 1.8 (0.2) × 1014 | 0.005 |
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