Table 4
Inferred system parameters.
| Parameter | Units | Prior | Median and 68.3% CI | Prior | Median and 68.3% CI |
|---|---|---|---|---|---|
| Star | |||||
| Stellar mass, m★ | (M⊙) | N(0.885, 0.034) | 0.892 ± 0.034 | ||
| Stellar radius, R★ | ![]() |
N(0.845, 0.039) | 0.824 ± 0.024 | ||
| Stellar mean density, ρ★ | (g cm−3) | 1.59 ± 0.12 | |||
| Surface gravity, log 𝑔 | (cgs) | 4.556 ± 0.024 | |||
| K2 GP Prot | (d) | U(0.1, 100) | 18.36 ± 0.51 | ||
| Planets | Planet b | Planet b | Planet c | Planet c | |
| Semi-major axis, a | (au) | 0.07487 ± 0.0009 | 0.0982 ± 0.0012 | ||
| Eccentricity, e | 0.04 ± 0.024 | 0.067 ± 0.017 | |||
| Argument of pericenter, ω | (°) | 197 ± 26 | 252-+1181 | ||
| Inclination, i | (°) | S (0, 180) | 89. 7 ± 0.26 | S (0, 90) | 89.37 ± 0.15 |
| Longitude of the ascending node, Ω | (°) | 180 (fixed at tref) | U (90, 270) | 180.84 ± 0.45 | |
| Mean anomaly, M0 | (°) | 257 ± 26 | 202+13−20 | ||
| Mass ratio, mp/m★ | U(0, 1) | (10.357 ± 0.085)×10−5 | U(0, 1) | (3.746 ± 0.056)×10-5 | |
| Radius ratio, Rp/R★ | U(0, 1) | 0.07332 ± 0.00054 | U(0, 1) | 0.04321 ± 0.00044 | |
| Scaled semi-major axis, a/R★ | 19.53 ± 0.51 | 25.61 ± 0.66 | |||
| Impact parameter, b | 0.217 ± 0.089 | 0.299 ± 0.065 | |||
| T′0 - 2 450 000 | (BJDTDB) | U(5829, 7829) | 6829.22231 ± 0.00016 | U (5829, 7829) | 6829.18490 ± 0.00054 |
| P′ | (d) | U(5, 10) | 7.922806 ± 0.000090 | U(10, 15) | 11.89770 ± 0.00046 |
| K′ | (m s−1) | 10.66 ± 0.17 | 3.368 ± 0.063 | ||
| Planet mass, mp | (ME) | 30.8 ± 1.3 | 11.12 ± 0.44 | ||
| Planet radius, Rp | ![]() |
6.59 ± 0.22 | 3.88 ± 0.14 | ||
| Planet mean density, ρp | (g cm−3) | 0.590 ± 0.053 | 1 .046 ± 0.097 | ||
| Planet surface gravity, log 𝑔p | (cgs) | 2.841 ± 0.028 | 2.859 ± 0.028 | ||
| Equilibrium temperature, Teq | (K) | 857 ± 21 | 749 ± 19 | ||
| Mutual inclination, Ib,c | (°) | 0.85 ± 0.44 | |||
![]() |
U(−1, 1) | 0.00918 ± 0.00020 | |||
![]() |
U(1, 1) | −0.050 ± 0.040 | |||
![]() |
U(1, 1) | −0.05386 ± 0.00082 | |||
![]() |
U(1, 1) | −0.071 ± 0.027 | |||
| Planets | Planet d | Planet d | Candidate planet e | Candidate planet e | |
| Semi-major axis, a | (au) | 0.03478 ± 0.00043 | 0.1387 ± 0.0017 | ||
| Eccentricity, e | <0.44 † | <0.15 † | |||
| Argument of pericenter, ω | (°) | ![]() |
245 ± 37 | ||
| Inclination, i | (°) | S (0, 180) | 89.7 ± 1.6 | S (0, 180) | ![]() |
| Longitude of the ascending node, Ω | (°) | U(90, 270) | 179.3 ± 7.3 | U (90, 270) | 179±10 |
| Mean anomaly, M0 | (°) | 200 ± 100 | 152 ± 41 | ||
![]() |
U(1, 1) | 0.02 ± 0.27 | U(−1, 1) | −0.08 ± 0.12 | |
![]() |
U(1, 1) | ![]() |
U(−1, 1) | −0.174 ± 0.068 | |
| Mass ratio, mp/m★ | U(0, 1) | <2.1×10−5 † | U(0, 1) | <0.67×10−5 † | |
| Radius ratio, Rp/R★ | U(0, 1) | 0.01165 ± 0.00066 | U(0, 1) | 0.0135 ± 0.0016 | |
| Scaled semi-major axis, a/R★ | 9.07 ± 0.24 | 36.17 ± 0.94 | |||
| Impact parameter, b | ![]() |
![]() |
|||
| T'′0 - 2 450 000 | (BJDTDB) | U(5829, 7829) | 6828.9909 ± 0.0035 | U (5829, 7829) | 6832.2143 ± 0.0066 |
| P′ | (d) | U(0, 5) | ![]() |
U(15, 25) | 19.9724 ± 0.0054 |
| K′ | (m s−1) | <3.1 † | <0.51 † | ||
| Planet mass, mp | (ME) | <6.2 † | <2.0 † | ||
| Planet radius, Rp | ![]() |
1.044 ± 0.064 | 1.22 ± 0.15 | ||
| Planet mean density, ρp | (g cm−3) | <31 † | <8.4 † | ||
| Planet surface gravity, log 𝑔p | (cgs) | 2.95 ± 0.63 | 2.46 ± 0.40 | ||
| Equilibrium temperature, Teq | (K) | 1258 ±31 | 630 ± 16 |
Notes. The table lists the prior, the posterior median, and the 68.3% CI for the photodynamical analysis (Sect. 4.2). The Jacobi orbital elements are given for the reference time tref = 2 456 829.222 BJDTDB.† Upper limit at 99% confidence. The planetary equilibrium temperature is computed for zero albedo and full day-night heat redistribution. P′ and T′0 should not be confused with the period or the time of conjunction, respectively, and they were only used to reduce the correlations between jump parameters, replacing the semimajor axis and the mean anomaly at tref.
with
. CODATA 2018: 𝒢 = 6.67430 ×10−11m3 kg−1 s−2. IAU 2012: au = 149 597 870 700 m. IAU 2015:
,
. N(µ, σ): Normal distribution with mean µ and standard deviation σ. U(a, b): A uniform distribution defined between a lower a and upper b limit. S (a, b): A sinusoidal distribution defined between a lower a and upper b limit. Transits occur when the sum of the true anomaly and the argument of pericenter equals −90°.
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