Table 6
Planetary and stellar parameters.
| CoRoT-28b | CoRoT-29b | |||
| Ephemeris | ||||
|
|
||||
| Planet orbital period P [days] | 5.20851 ± 0.00038 | 2.850570 ± 0.000006 | ||
| Transit epoch Ttr [HJD-2 450 000] | 5755.8466 ± 0.0029 | 5753.115 ± 0.001 | ||
| Transit duration dtr [h] | 5.70 ± 0.09 | 2.19 ± 0.04 | ||
| Results from radial velocity observations | ||||
|
|
||||
| Orbital eccentricity e |
|
0.082 ± 0.081 | ||
| Argument of periastron ω [°] |
|
|
||
| Radial velocity semi-amplitude K [ m s-1] | 56.4 ± 4.9 | 125 ± 17 | ||
| Systemic velocity Vr (HARPS) [ km s-1] | 76.7081 ± 0.0051 | 64.1907 ± 0.0012 | ||
| O–C residuals (HARPS) [ m s-1] |
|
11 ± 11 | ||
| Systemic velocity Vr (Sophie) [ km s-1] | 76.7549 ± 0.0082 | |||
| O–C residuals (Sophie) [ m s-1] | 32.8 ± 6.4 | |||
| Systemic velocity Vr (FIES) [ km s-1] | 76.8642 ± 0.0074 | |||
| O–C residuals (FIES) [ m s-1] | 8.5 ± 8.3 | |||
| Fitted transit parameters | ||||
|
|
||||
| Scaled semi-major axis a/Rs,eq | 7.29 ± 0.16 | 9.22 ± 0.19 | ||
| Radius ratio k = Rp/Rs | 0.0551 ± 0.0004 | 0.1028 ± 0.0043 | ||
| Quadratic limb darkening coefficientsau+ | 0.78 ± 0.11 | 0.62 ± 0.15 | ||
| u − | 0.37 ± 0.22 | 0.58 ± 0.14 | ||
| Impact parameterbb | 0.24 ± 0.09 | − | ||
| Orbital inclination ip [deg] | − | 87.3 ± 2.7 | ||
| Stellar rotational axis inclination is [°] | − | 46 ± 19 | ||
| Stellar rotational axis orientation Ωs [°] | − | 256 ± 40 | ||
| Gravity darkening exponent β | − | 0.89 ± 0.25 | ||
| J2 for the star | − | 0.028 ± 0.019 | ||
| Contamination factor [%] | 3 ± 1 | 54 ± 4 | ||
| Deduced transit parameters | ||||
|
|
||||
| Stellar radius ratio f = Rs,pole/Rs,eq | 1 (fixed) | 0.94 ± 0.02 | ||
| Ms1 / 3/Rs [solar units]c | 0.58 ± 0.02 | 1.09 ± 0.02 | ||
| Stellar density ρs [ kg m-3] | 270 ± 6 | 1 825 ± 38 | ||
| Impact parameterbb | − | 0.43 ± 0.44 | ||
| Orbital inclination ip [deg] | 88.1 ± 0.8 | − | ||
| Spectroscopic parameters | ||||
|
|
||||
| Effective temperature Teff [K] | 5 150 ± 100 | 5 260 ± 100 | ||
| Stellar surface gravity log g [cgs] | 3.6 ± 0.2 | 4.3 ± 0.2 | ||
| Metallicity [ Fe/H ] [dex] | 0.15 ± 0.10 | 0.20 ± 0.10 | ||
| Stellar rotational velocity v sin i [ km s-1] | 3.0 ± 0.5 | 3.5 ± 0.5 | ||
| Microturbulence velocity Vmic [ km s-1] | 0.9 ± 0.1 | 0.9 ± 0.1 | ||
| Macroturbulence velocity Vmac [ km s-1] | 3.3 ± 0.3 | 1.2 ± 0.3 | ||
| Lithium equivalent width [mÅ] | 31 | no Li at 6708 Å | ||
| Spectral type | G8/9IV | K0 V | ||
| Stellar and planetary physical parameters from combined analysis | ||||
|
|
||||
| Star mass [M⊙]c | 1.01 ± 0.14 | 0.97 ± 0.14 | ||
| Star radius [R⊙]c | 1.78 ± 0.11 | 0.90 ± 0.12 | ||
| Stellar surface gravity log g [cgs] | 3.94 ± 0.12 | 4.52 ± 0.19 | ||
| Age of the star t [Gyr] | 12.0 ± 1.5 | 1−8 | ||
| Distance of the system [pc] | 560 ± 70 | 765 ± 50 | ||
| Interstellar extinction Av [mag] | 0.75 ± 0.20 | 0.85 ± 0.15 | ||
| Orbital semi-major axis (Kepler’s law) a [AU] | 0.0590 ± 0.0027 | 0.0390 ± 0.0020 | ||
| Orbital semi-major axis (light curve) a [AU] | 0.0603 ± 0.0050 | 0.0386 ± 0.0059 | ||
| Planet mass Mp [MJup]d | 0.484 ± 0.087 | 0.85 ± 0.20 | ||
| Planet radius Rp [RJup]d | 0.955 ± 0.066 | 0.90 ± 0.16 | ||
| Planet density ρp [ g cm-3] | 0.69 ± 0.27 | 1.45 ± 0.74 | ||
| Planet surface gravity log g [cgs] | 3.12 ± 0.14 | 3.42 ± 0.19 | ||
Notes.
I(μ) /I(1) = 1 − μ + uaμ + ub(1 − μ)2, where I(1) is the specific intensity at the centre of the disc and μ = cosγ, γ being the angle between the surface normal and the line of sight; u+ = ua + ub and u− = ua − ub.
Radius and mass of Sun taken as 695 500 km and 1.9891 × 1030 kg, respectively (Lang 1999).
Radius and mass of Jupiter taken as 71 492 km and 1.8992 × 1027 kg, respectively (Lang 1999).
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.