Table 6
Best-fitting and derived system and planetary parameters of the HD 22946 planetary system.
| Parameter (unit) | Description | HD 22946b | HD 22946c | HD22946d |
|---|---|---|---|---|
| Tc (BJDtdb) | Reference mid-transit time |  |
 |
 |
| Porb (days) | Orbital period |  |
9 573083 ± 0 000014 |  |
| b | Impact parameter |  |
 |
 |
| a/Rs | Scaled semi-major axis | 11.03 ± 0.12 |  |
57.00 ± 0.66 |
| a (au) | Semi-major axis |  |
 |
 |
| Rp/Rs | Planet-to-star radius ratio |  |
 |
 |
| tdur (days) | Transit duration |  |
 |
 |
| Rp (R⊕) | planet radius | 1.362 ± 0.040 |  |
2.607 ± 0.060 |
| Mp (M⊕) | planet mass(⋆) | 13.71 | 9.72 | 26.57 |
| Mp,est (M⊕) | Estimated planet mass(♣) | 2.42 ± 0.12 | 6.04 ± 0.17 | 7.32 ± 0.28 |
| Mp,est (M⊕) | Estimated planet mass(♥) | 2.61 ± 0.27(†) | 6.61 ± 0.17(‡) | 7.90 ± 0.28(‡) |
| ρp (g cm−3) | planet density(⋆) | 18.96 | 3.15 | 10.80 |
| K (m s−1) | RV semi-amplitude(⋆) | 5.05 | 2.70 | 4.31 |
| Ip (W m−2) | Insolation flux |  |
 |
 |
| Tsurf (K) | Surface temperature(♦) | 1241 ± 14 | 931 ± 11 | 546 ± 6 |
| TSM | Transmission spectroscopy metric(#) | 43 ± 4 | 63 ± 2 | 43 ± 2 |
Notes. Based on the joint fit of the TESS and CHEOPS photometric data and RV observations. Table shows the best-fitting value of the given parameter and its ± 1σ uncertainty. The fitted values correspond to quantile 0.50 (median) and the uncertainties to quantils ±0.341 in the parameter distributions obtained from the samples. (⋆)Only the 3σ upper limits are listed here due to the low number of the RV observations. (♦)Assuming the albedo value of 0.2. (♣)Based on the relations presented by Chen & Kipping (2017), assuming that the planet radii are from the interval of 1.23 < Rp < 14.26 R⊕. (♥)Based on the relations presented by Otegi et al. (2020). (†)Assuming that ρp > 3.3 g cm−3. (‡)Assuming that ρp < 3.3 g cm−3. #Based on the criteria set by Kempton et al. (2018), using the scale factor of 1.26, the stellar radius of Rs = 1.117 ± 0.009 R⊙ and J = 7.250 ± 0.027 mag (see Table 4).
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