Open Access
Table 1
Summary of retrieval parameters and prior distributions for the free chemistry approach used in the cloud-free, gray cloud, and non-gray cloud models.
| Parameter | Symbol | Prior type | Prior value |
|---|---|---|---|
| Surface gravity | log 𝑔 | Uniform | 3.0–6.0 cm/s2 |
| Distance | d | Gaussian | 21.14 ± 0.22 pc |
| Flux scaling factor | f | Uniform | 0.1–5.0 |
| Temperature at base of modeled atmosphere | T1 | Uniform | 1000–5000 K |
| T -P profile coefficients(*) | bi =1…6 | Uniform | 0.1–0.95 |
| Error inflation term | ln δ | Uniform | –10–1.0 |
| Mixing ratio of species i | xi | log-uniform | 10–12–0.1 |
| Gray clouds | |||
| Pressure at top of cloud | pt | log-uniform | 10–2–50 bar |
| Cloud base pressure scale factor | bc | log-uniform | 1–10 |
| Optical depth | τ | Uniform | –10–20 |
| Non-gray clouds | |||
| Pressure at top of cloud | pt | log-uniform | 10–2–50 bar |
| Cloud base pressure scale factor | bc | log-uniform | 1–10 |
| Optical depth at reference wavelength | τref | Uniform | –10–20 |
| Particle size (dimensionless) with highest extinction | Q0 | log-uniform | 1–100 |
| Power-law index for small particles | a0 | Uniform | 3–7 |
| Particle size | a | log-uniform | 0.1–50 µm |
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