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Table 3
Uniform prior ranges and results from the petitRADTRANS retrievals and the parameters for the best-fit Sonora Diamondback spectra.
| Parameter | Prior | 2M1721+33 | 2M0036+18 (epoch 1) | 2M0036+18 (epoch 2) | 2M1906+40 |
|---|---|---|---|---|---|
| petitRADTRANS | |||||
| Log (g) | U(3.0,5.5) | 4.24±0.04 | 4.27±0.01 | 4.27±0.01 | 4.96±0.06 |
| Radius (RJup) | U(0.6,1.4) | 0.84±0.01 | 0.81±0.01 | 0.81±0.01 | 0.85±0.01 |
| Cloud fraction (fcloud) | U(0,1) | 0.73±0.01 | 0.83±0.01 | 0.83±0.01 | 0.82±0.01 |
| k0 (350nm opacity) | U(–5,20) | 2.42±0.75 | 2.01 ±0.04 | 2.02 ±0.04 | 5.62±0.68 |
| γ (Power-law exponent) | U(–20,20) | −4.23±0.20 | −4.02±0.02 | −4.04±0.02 | −4.01 ±0.02 |
| Log10 CO | U(–7,0) | −2.54±1.97 | −2.60±0.03 | −2.61 ±0.03 | −1.99±0.07 |
| Log10 H2O | U(–7,0) | −3.09±0.02 | −3.22±0.01 | −3.22±0.01 | −2.79±0.05 |
| Log10 K | U(–7,0) | −6.85± 0.04 | −7.00±0.01 | −6.99±0.01 | −7.00±0.01 |
| Log10 Na | U(–7,0) | −6.98± 0.04 | −7.00±0.01 | −7.00±0.01 | −6.98±0.03 |
| Sonora Diamondback | |||||
| Teff (K) | – | 1700 | 1600 | 1600 | 2000 |
| Log (g) | − | 5 | 5 | 5 | 5.5 |
| Metallicity | − | +0.5 | +0.5 | +0.5 1.1 | +0.5 |
| C/O | – | 1.0 | 1.0 | 1.0 | 1.0 |
Notes. The abundances of the species are in units of log mass mixing ratio.
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