Table 2
Initial abundances relative to the number of H atoms.
| Species | Abundance | Species | Abundance |
|---|---|---|---|
| H2 | 0.5 | H2O | 1.5 × 10−4 |
| He | 0.14 | N | 2.25 × 10−5 |
| CN | 6.0 × 10−8 | H |
1.0 × 10−8 |
| CS | 4.0 × 10−9 | SO | 5.0 × 10−9 |
| Si+ | 1.0 × 10−11 | S+ | 1.0 × 10−11 |
| Mg+ | 1.0 × 10−11 | Fe+ | 1.0 × 10−11 |
| C+ | 1.0 × 10−9 | HCO+ | 9.0 × 10−9 |
| CO | 1.0 × 10−4 | N2 | 1.0 × 10−6 |
| C | 7.0 × 10−7 | NH3 | 8.0 × 10−8 |
| HCN | 2.0 × 10−8 | C/O | 0.40 |
| C2H | 8.0 × 10−9 | C/N | 4.09 |
| Cref | 2.44 × 10−4 | Oref | 1.75 × 10−4 |
Notes. Included is the initial ratio of C/O and the initial ratio of carbon to nitrogen (C/N). These are the same as used in Cridland et al. (2017a) and are based on Fogel et al. (2011). We similarly show the elemental abundance of the carbon and oxygen in the refractories (Cref and Oref).
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