Table 1
Results of planet atmosphere model fitting.
| Model* | Teff [K]** | log(g)** | Rp [RJ] | C/O | Fe/H | fsed | AV [mag] | log L/L**⊙ | χ2 |
|---|---|---|---|---|---|---|---|---|---|
| TWA 27A | |||||||||
| BT-Settl | 2360 | 3.5 | 3.4 | Solar | Solar | − | − | −2.47 | 204 |
| BT-Settl+ext+disk | 2780 | 4.3 | 2.6 | Solar | Solar | − | 0.7 | −2.42 | 41 |
| TWA 27b | |||||||||
| ExoREM | 1200 | 3.0 | 1.27 | 0.8 | 0.7 | − | − | −4.50 | 12 |
| ExoREM+ext | 1400 | 4.0 | 1.2 | 0.55 | −0.2 | 3.7 | −4.28 | 10 | |
| ATMO | 1280 | 3.2 | 1.15 | 0.3 | −0.2 | — | — | −4.47 | 26 |
| ATMO+ext | 1400 | 3.2 | 1.01 | 0.4 | −0.6 | − | 2.1 | −4.43 | 15 |
| SONORA+ext | 1250 | 4.4 | 1.3 | solar | 0.5 | 1.0 | 2.7 | −4.41 | 13 |
Notes. (*)Best-fit parameters of the various set-ups that were tested. The ‘ext’ denotes a model with ISM extinction, and ‘disk’ a model including an additional blackbody component. (**)Due to the small uncertainties of NIRSpec, the MCMC produces unrealistically constrained posterior distributions. We urge the reader to interpret the model fits with caution.
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