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Table 3
CoRoT-25 and CoRoT-26 system parameters.
| Name | CoRoT-25 | CoRoT-26 |
| CoRoT target ID | LRc02_E1_1280 | LRc02_E2_4747 |
| CoRoT ID | 105793995 | 105209106 |
| USNO-A2 ID | 0900-13489714 | 0900-13355983 |
| 2MASS ID | 18423111 + 0630497 | 18390012 + 0658112 |
| Coordinates | ||
|
|
||
| RA (J2000) [hh:mm:ss.ss] | 18:42:31.13 | 18:39:00.13 |
| Dec (J2000) [dd:mm:ss.ss] | +06:30:50.04 | +06:58:11.71 |
| Magnitudes | ||
|
|
||
| U RGO | 15.93 ± 0.47 | |
| B Harris | 15.806 ± 0.064 | 16.839 ± 0.131 |
| V Harris | 14.965 ± 0.031 | 15.756 ± 0.06 |
| r′ Sloan-Gunn | 14.571 ± 0.023 | 15.299 ± 0.032 |
| i′ Sloan-Gunn | 14.039 ± 0.022 | 14.76 ± 0.075 |
| J 2MASS | 13.300 ± 0.024 | 13.813 ± 0.027 |
| H 2MASS | 12.990 ± 0.032 | 13.358 ± 0.035 |
| Ks 2MASS | 12.846 ± 0.031 | 13.261 ± 0.034 |
| WISE W1 | 12.802 ± 0.025 | 13.066 ± 0.028 |
| WISE W2 | 12.857 ± 0.037 | 13.219 ± 0.039 |
| WISE W3 | >11.939 | >12.546 |
| WISE W4 | >8.935 | >9.045 |
| Results from radial velocity observations | ||
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|
||
| Orbital eccentricity e | 0.0 (fixed) | 0.0 (fixed) |
| Radial velocity semi-amplitude K [ m s-1] | 30.0 ± 4.6 | 56.9 ± 8.4 |
| Systemic velocity Vr [ km s-1] | −15.419 ± 0.004 | 15.518 ± 0.007 |
| Results from combined light curve and radial velocity analysis | ||
|
|
||
| Planet orbital period P [days] | 4.86069 ± 0.00006 | 4.20474 ± 0.00005 |
| Epoch of conjuntion tc [HJD] | 2 454 576.2156 ± 0.0008 | 2 454 573.6299 ± 0.0008 |
| Transit duration W [h] |
|
|
| Radius ratio r = Rp/R∗ |
|
0.0718 ± 0.0010 |
| Impact parameter b |
|
|
| Linear limb-darkening coefficient u1 |
|
|
| Systemic velocity Vr [ km s-1] |
|
|
 [km s−2/3] |
2.2 ± 0.3 | 4.4 ± 0.4 |
| Deduced parameters | ||
|
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||
| Scaled semi-major axis a/R∗ |
|
|
 [solar units] |
|
|
| Inclination i [deg] |
|
|
| Radial velocity semi-amplitude K [ m s-1] |
|
|
| Stellar parameters from spectroscopy | ||
|
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||
| Effective temperature Teff[K] | 6040 ± 90 | 5590 ± 100 |
| Surface gravity log g [cgs] | 4.28 ± 0.10 | 4.10 ± 0.10 |
| Metallicity [Fe/H] [dex] | −0.01 ± 0.13 | 0.01 ± 0.13 |
| Rotational velocity v sin i[ km s-1] | 4.3 ± 0.5 | 2 ± 1 |
| Microturbulent velocity vmicro [ km s-1] | 1.0 ± 0.5 | 0.8 |
| Macroturbulent velocity vmacro [ km s-1] | 4.45 | 2.0 ± 1.5 |
| Stellar and planetary physical parameters from combined analysis | ||
|
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||
| Star mass [M⊙] |
|
1.09 ± 0.06 |
| Star radius [R⊙] |
|
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| Deduced stellar surface gravity log g [cgs] |
|
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| Age of the star t [Gyr] |
|
|
| Distance of the system [pc] |
|
|
| Extinction AV [mag] | 0.70 ± 0.07 | 0.85 ± 0.10 |
| Orbital semi-major axis a [AU] |
|
0.0526 ± 0.0010 |
| Planet mass Mp [MJ] | 0.27 ± 0.04 | 0.52 ± 0.05 |
| Planet radius Rp [RJ] |
|
|
| Planet surface gravity log gp [cgs] |
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|
| Planet mean density ρp [gcm-3] |
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| Planet mean density ρp [ρJ] |
|
|
| Equilibrium temperatureaTeq [K] | 1330 |
1600 |
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