Table A.2.
Chemical species included in our model, their respective volume mixing ratios, and their initial abundances with respect to hydrogen.
| Species | Tcond (K) | Volume mixing ratio | Initial abundance |
|---|---|---|---|
| CO | 20 | 0.20 (0.29) × C/H | 5.38 (7.80)×10−5 |
| N2 | 20 | 0.45 × N/H | 3.04 × 10−5 |
| CH4 | 30 | 0.10 (0.01) × C/H | 2.69 (0.27)×10−5 |
| CO2 | 70 | 0.10 × C/H | 2.69 × 10−5 |
| NH3 | 90 | 0.10 × N/H | 6.76 × 10−6 |
| H2S | 150 | S/H | 1.32 × 10−5 |
| H2O | 150 | O/H - (CO/H + 2 × CO2/H + 8 ×NaAlSi3O8/H + | 2.67 (2.43)×10−4 |
| 8 ×KAlSi3O8/H + 4 × Mg2SiO4/H + VO/H + | |||
| 3 × MgSiO3/H + 3 × Al2O3/H + TiO/H) | |||
| C | 631 | 0.60 × C/H | 1.61 × 10−4 |
| NaAlSi3O8 | 958 | Na/H | 1.74 × 10−6 |
| KAlSi3O8 | 1006 | K/H | 1.07 × 10−7 |
| Mg2SiO4 | 1354 | Mg/H - (Si/H - 3 × K/H - 3 × Na/H) | 1.29 × 10−5 |
| Fe | 1357 | Fe/H | 3.16 × 10−5 |
| VO | 1423 | V/H | 8.59 × 10−9 |
| MgSiO3 | 1500 | Mg/H - 2 × (Mg/H - (Si/H - 3 × K/H - 3 × Na/H)) | 1.39 × 10−5 |
| Al2O3 | 1653 | 0.5 × (Al/H - (K/H - Na/H)) | 2.23 × 10−6 |
| TiO | 2000 | Ti/H | 8.91 × 10−8 |
Volume mixing ratios of each species are based on the works of Madhusudhan et al. (2014), Bitsch & Battistini (2020), and Schneider & Bitsch (2021a,b), and their condensation temperatures are from Lodders (2003). Solar elemental abundances (Asplund et al. 2009) are assumed. Values in parentheses are the ratios we used for the additional simulations with less CH4 and the corresponding initial abundance of CO, CH4, and water.
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