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Table 5
Kepler-423 system parameters.
| Model parameters | |
|
|
|
| Planet orbital period Porb (day) | 2.68432850 ± 0.00000007 |
| Planetary mid-transit epochaT0(BJDTDB-2 450 000 day) | 4966.35480997 ± 0.00002124 |
Planet-to-star area ratio  |
0.015872 ± 0.000062 |
| Planet-to-star surface brightness ratio f | (8.93 ± 4.13) × 10-4 |
| Impact parameter b | 0.3006 ± 0.0100 |
| Bulk stellar density ρ⋆ (g cm-3) | 1.398 ± 0.096 |
| Linear limb-darkening coefficient u1 | 0.4650 ± 0.0100 |
| Quadratic limb-darkening coefficient u2 | 0.1518 ± 0.0228 |
| Radial velocity semi-amplitude K (km s-1) | 0.0967 ± 0.0118 |
| Systemic radial velocity Vγ (km s-1) | −3.0410 ± 0.0081 |
| Orbit eccentricity e |
|
| Argument of periastron ω (degree) |
|
| Kepler LC data scatter σLC (ppm) | 292.2 ± 2.4 |
| Kepler SC data scatter σSC (ppm) | 1145.7 ± 2.1 |
| Derived parameters | |
|
|
|
| Planet-to-star radius ratio Rp/R⋆ | 0.12599 ± 0.00024 |
| Planetary eclipse depth ΔFec (ppm) | 14.2 ± 6.6 |
| Scaled semi-major axis of the planetary orbit ap/R⋆ |
|
| Semi-major axis of the planetary orbit ap (AU) |
|
| Orbital inclination angle ip (degree) | 87.828 ± 0.126 |
| Planetary transit duration T14 (h) | 2.7220 ± 0.0019 |
| Transit ingress and egress duration T12 = T34 (h) | 0.3330 ± 0.0024 |
| Stellar fundamental parameters | |
|
|
|
| Effective temperature Teff (K) | 5560 ± 80 |
| Surface gravityb log g (log10 cm s-2) | 4.44 ± 0.10 |
| Surface gravityc log g (log10 cm s-2) | 4.41 ± 0.04 |
| Metallicity [M/H] (dex) | −0.10 ± 0.05 |
| Microturbulent velocitydvmicro (km s-1) | 1.0 ± 0.1 |
| Macroturbulent velocitydvmacro (km s-1) | 2.8 ± 0.4 |
| Projected stellar rotational velocity v sin i⋆ (km s-1) | 2.5 ± 0.5 |
| Spectral typee | G4 V |
| Star mass M⋆ (M⊙) | 0.85 ± 0.04 |
| Star radius R⋆ (R⊙) | 0.95 ± 0.04 |
| Star age t (Gyr) | 11 ± 2 |
| Star rotation periodfProt (day) | 22.047 ± 0.121 |
| Interstellar extinction AV (mag) | 0.044 ± 0.044 |
| Distance of the system d (pc) | 725 ± 75 |
| Planetary fundamental parameters | |
|
|
|
| Planet massgMp (MJup) | 0.595 ± 0.081 |
| Planet radiusgRp (RJup) | 1.192 ± 0.052 |
| Planet density ρp (g cm-3) | 0.459 ± 0.083 |
| Equilibrium temperature Teq (K) | 1605 ± 120 |
| Brightness temperaturehTbr (K) | 1950 ± 250 |
| Geometric albedohAg | 0.055 ± 0.028 |
| Bond albedohAB | 0.037 ± 0.019 |
Notes.
(c)
Obtained from Teff, [M/H], and ρ⋆, along with the Pisa Stellar Evolution Data Base for low-mass stars.
(d)
Using the calibration equations of Bruntt et al. (2010) and Doyle et al. (2014).
(f)
From McQuillan et al. (2013).
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