Transiting exoplanets from the CoRoT space mission - XIV. CoRoT-11b: a transiting massive “hot-Jupiter” in a prograde orbit around a rapidly rotating F-type star

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Volume 524 (December 2010)

A&A, 524 (2010) A55

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Table 4

CoRoT-11b – Planet and star parameters.

Ephemeris

Planet orbital period P [days]	2.994330 ± 0.000011
Planetary transit epoch T_tr [HJD-2 400 000]	54597.6790 ± 0.0003
Planetary transit duration d_tr [h]	2.5009 ± 0.0144
Results from radial velocity observations

Orbital eccentricity e	0 (fixed)
Radial velocity semi-amplitude K [m/s]	280.0 ± 40.0
O–C residuals [m/s]	88
Fitted transit parameters

Planet-to-star radius ratio k = R_p/R^∗	0.1070 ± 0.0005
Linear limb darkening coefficient u₊	0.61 ± 0.06
Linear limb darkening coefficient u₋	0.02 ± 0.04
Orbital phase of planetary transit ingress (θ₁)	− 0.0174 ± 0.0001
Deduced transit parameters

Scaled semi-major axis a/R^∗	6.890 ± 0.080
[solar units]	0.787 ± 0.010
Mean stellar density ρ^∗ [g/cm³]	0.69 ± 0.02
Inclination i [deg]	83.170 ± 0.150
Impact parameter^ab	0.818 ± 0.008
Spectroscopic parameters

Effective temperature T_eff [K]	6440 ± 120
Surface gravity log g^b [dex]	4.22 ± 0.23
Surface gravity log g^c [dex]	4.26 ± 0.06
Metallicity [ Fe/H ] [dex]	−0.03 ± 0.08
Stellar rotational velocity v sin i_⋆[km s^-1]	40.0 ± 5.0
Spectral type	F6 V^d
Stellar physical parameters from combined analysis

Star mass M_⋆ [M_⊙]	1.27 ± 0.05
Star radius R_⋆ [R_⊙]	1.37 ± 0.03
Age of the star t [Gyr]	2.0 ± 1.0
Interstellar extinction A_V [mag]	0.55 ± 0.10
Distance of the system d [pc]	560 ± 30
Planetary physical parameters from combined analysis

Planet mass M_p [M_J]^e	2.33 ± 0.34
Planet radius R_p [R_J]^e	1.43 ± 0.03
Planet density ρ_p [g/cm³]	0.99 ± 0.15
Orbital semi-major axis^a [AU]	0.0436 ± 0.005
Equilibrium temperature^fT_eq [K]	1657 ± 55

Notes.

^(a)

The impact parameter is defined as ;

^(b)

derived from the spectroscopic analysis;

^(c)

derived using the light curve parameter and the stellar mass as inferred from stellar evolutionary models;

^(d)

with an accuracy of ± 1 sub-class;

^(e)

radius and mass of Jupiter taken as 71 492 km and 1.8986 × 10³⁰ g, respectively;

^(f)

zero albedo equilibrium temperature for an isotropic planetary emission.

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