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Table 3
Fit and derived parameters for the TOI-2257 b system.
| Parameter | Unit | Value | Prior |
|---|---|---|---|
| Fitted parameters | |||
| Orbital period P | days | 35.189346(90) |  |
| Mid-transit time T0 | BJD-2 450 000 |  |
 |
| (Rp∕R*) |  |
 |
|
| Impact parameter b |  |
 |
|
 |
 |
 |
|
 |
 |
 |
|
| Stellar mass M* | M⊙ |  |
 |
| Stellar radius R* | R⊙ | 0.313 ± 0.015 |  |
| Physical and orbital parameters | |||
| Planet radius Rp | R⊕ |  |
|
| Orbital eccentricity e |  |
||
| Argument of periastron ω | ° |  |
|
| Semimajor axis a | au | 0.145 ± 0.003 | |
| Inclination i | ° |  |
|
| Equilibrium temperature Teq(*) | K |  |
|
| Depth δ |  |
||
| Transit duration | h |  |
|
| Predicted parameters | |||
| Planet mass Mp | M⊕ |  |
|
| RV Semi-amplitude K | m s−1 |  |
|
| TSM |  |
||
| Limb darkening | |||
| q1 (TESS) | 0.328 ± 0.008 |  |
|
| q2 (TESS) | 0.203 ± 0.022 |  |
|
| q1 (I + z) | 0.289 ± 0.008 |  |
|
| q2 (I + z) |  |
 |
|
| q1 (i′) |  |
 |
|
| q2 (i′) | 0.213 ± 0.03 |  |
|
| q1 (z′) |  |
 |
|
| q2 (z′) |  |
 |
|
| q1 (r′) |  |
 |
|
| q2 (r′) | 0.164 ± 0.034 |  |
|
Notes. (*) Time-averaged equilibrium temperature taking into account the eccentric orbit using the formulation of Méndez & Rivera-Valentín (2017), assuming zero albedo and full day-night heat redistribution.
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