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Table 3
Median values and 68% confidence intervals for HD 1397 fitted with EXOFASTv2, including two Keplerians, of which the 42-day period one tracks stellar activity.
| Parameters | Description and units | Values | |
|---|---|---|---|
| Planetary parameters | b | ||
| P | Period (days) |  |
|
| RP | Radius (RJ) |  |
|
| MP | Mass (MJ) | 0.415 ± 0.020 | |
| ρP | Density (cgs) |  |
|
| log gP | Surface gravity | 2.991 ± 0.029 | |
| TC | Time of conjunction (BJDTDB) | 2458332.08261 ± 0.00060 | |
| a | Semi-major axis (AU) |  |
|
| i | Inclination (°) |  |
|
| e | Eccentricity |  |
|
| ω* | Argument of periastron (°) |  |
|
| Teq | Equilibrium temperature (K) |  |
|
| K | RV semi-amplitude (m s−1) | 32.0 ± 1.4 | |
| RP∕R* | Radius of planet in stellar radii |  |
|
| a∕R* | Semi-major axis in stellar radii |  |
|
| δ | Transit depth (fraction) |  |
|
| τ | Ingress/egress transit duration (days) |  |
|
| T14 | Total transit duration (days) |  |
|
| b | Transit impact parameter |  |
|
| Θ | Safronov number |  |
|
| ⟨F⟩ | Incident flux (109 erg s−1 cm−2) |  |
|
| d∕R* | Separation at mid transit |  |
|
| Stellar parameters (see Table 2 for additional results) | |||
| L* | Luminosity (L⊙) |  |
|
| [Fe/H]0 | Initial metallicity | 0.265 ± 0.088 | |
| EEP | Equal evolutionary point |  |
|
| σSED | SED photometry error scaling |  |
|
| Stellar activity Keplerian | |||
| Pactivity | Period (days) |  |
|
| TC, activity | Time of conjunction (BJD TDB) |  |
|
| eactivity | Eccentricity |  |
|
| ω*,activity | Argument of periastron (°) |  |
|
| Kactivity | RV semi-amplitude (m s−1) |  |
|
| Wavelength and transit parameters | TESS | ||
| u1 | Linear limb-darkening coeff | 0.340 ± 0.031 | |
| u2 | Quadratic limb-darkening coeff |  |
|
| σ2 | Added variance | 2.50 × 10−8 ± 0.16 × 10−8 | |
| F0 | Baseline flux |  |
|
| Telescope parameters (RV): | CORALIE | MINERVA-Australis | |
| γrel | Relative RV offset (m s−1) | 30767.8 ± 1.2 |  |
| σJ | RV Jitter (m s−1) |  |
5.1 ± 1.8 |
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