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Table 5
Abundances of selected molecules in ice mantles.
| Molecule | Predicted abundances (/ H) | Predicted abundances (/ s-H2O) | Abundance in comets (/s-H2O)(1) | 67P/Churyumov-Gerasimenko(2) | ||
|---|---|---|---|---|---|---|
| TMC 1 | Barnard 1b | TMC 1 | Barnard 1b | |||
| CO | 4.0 × 10−5 | 2.2 × 10−5 | 3.0 × 10−1 | 1.3 | 0.002−0.23 | − |
| CO2 | 9.0 × 10−6 | 7.4 × 10−5 | 6.8 × 10−2 | 4.2 | 0.025−0.30 | − |
| H2S | 3.4 × 10−6 | 3.3 × 10−6 | 2.5 × 10−2 | 1.9 × 10−1 | 0.0013−0.015 | 0.0067−0.0175 |
| OCS | 3.8 × 10−7 | 1.1 × 10−6 | 2.9 × 10−3 | 6.2 × 10−2 | (0.3−4) × 10−3 | 0.00017−0.00098 |
| SO | 5.5 × 10−9 | 6.3 × 10−8 | 4.1 × 10−5 | 3.6 × 10−3 | (0.4−3) × 10−3 | 0.00004−0.000014 |
| SO2 | 4.0 × 10−11 | 1.4 × 10−8 | 3.0 × 10−7 | 8.0 × 10−4 | 2 × 10−3 | 0.00011−0.00041 |
| CS | 3.7 × 10−8 | 7.9 × 10−8 | 2.8 × 10−4 | 4.6 × 10−3 | (0.2−2) × 10−3 | − |
| H2CS | 4.0 × 10−8 | 5.2 × 10−8 | 3.0 × 10−4 | 3.0 × 10−3 | (0.9−9) × 10−4 | − |
| NS | 1.8 × 10−6 | 2.7 × 10−6 | 1.3 × 10−2 | 1.5 × 10−1 | (0.6−1.2) × 10−4 | − |
| S2 | 1.2 × 10−9 | 2.8 × 10−9 | 8.7 × 10−6 | 1.6 × 10−4 | (0.1−25) × 10−4 | 0.000004−0.000013 |
| H2O | 1.3 × 10−4 | 1.7 × 10−5 | 1 | 1 | − | − |
References. (1) Data taken from Bockelée-Morvan & Biver (2017). (2)Taken from Calmonte et al. (2016).
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