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Table 2

CoRoT-9 system parameters.

Stellar parameters

Stellar mass [M] 0.96 ± 0.04
Stellar radius [R] 0.96 ± 0.06
Stellar density ρ [gcm-3] 1.51 ± 0.30
Age t [Gyr] 6 ± 3
Effective temperature Teff [K]a 5625 ± 80
Stellar surface gravity log g [cgs]a 4.54 ± 0.09
Stellar metallicity [Fe/H] [dex]a –0.01 ± 0.06
Stellar rotational velocity Vsini [ km s-1]a < 3.5
CoRoT limb-darkening coefficient q1
CoRoT limb-darkening coefficient q2
CoRoT limb-darkening coefficient ua 0.41 ± 0.09
CoRoT limb-darkening coefficient ub 0.22 ± 0.17
Spitzer limb-darkening coefficient q1
Spitzer limb-darkening coefficient q2
Spitzer limb-darkening coefficient ua
Spitzer limb-darkening coefficient ub
Systemic velocity Vr [ km s-1] 19.8150 ± 0.0017
Radial-velocity jitter sj [ m s-1] < 3.9

Transit and orbital parameters

Orbital period P [d] 95.272656 ± 0.000068
Transit epoch T0 [ BJDTDB−2 450 000]b 5365.52723 ± 0.00037
Transit duration T14 [d]
CoRoT bandpass radius ratio Rp/Rc
Spitzer bandpass radius ratio Rp/Rc
Inclination i [deg]
a/R 89.9 ± 5.9
Impact parameter b
Orbital eccentricity e
Argument of periastron ω [deg]
Radial-velocity semi-amplitude K [ m s-1] 39.0 ± 2.4

Planetary parameters

Planet mass Mp [MJup] 0.84 ± 0.05
Planet radius Rp [RJup]
Planet density ρp [gcm-3]
Planet surface gravity log gp [cgs] 3.26 ± 0.06
Orbital semimajor axis a [AU] 0.4021 ± 0.0054
Equilibrium temperature Teq [K]d 420 ± 16

Notes.

(a)

Values from D10.

(b)

In the planet-reference frame.

(c)

Two dilution factors were fitted along with the radius ratios for the transits observed by Spitzer in 2010 and CoRoT in 2011 (see text for more details); their values were found to be 13.2 ± 1.5% (Spitzer) and < 0.4% (CoRoT).

(d)

Black-body equilibrium temperature assuming a null Bond albedo and uniform heat redistribution to the nightside.

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