Transiting exoplanets from the CoRoT space mission - XI. CoRoT-8b: a hot and dense sub-Saturn around a K1 dwarf

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Volume 520 (September-October 2010)

A&A, 520 (2010) A66

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Table 5:

Star and planet characteristics of the CoRoT-8 system.
CoRoT-ID	0101086161
CoRoT-WinID	LRc01-E2-1145
GSC 2.3	N29S083644
Coordinates (J2000)	19:26:21.245 +01:25:35.55
Magnitudes B, V, r', i'	16.10, 14.80, 14.27, 13.41
Results from light-curve analysis
Planet period, P	$6.21229 \pm 0.00003$ days
Transit epoch, T₀	HJD $2~454~238.9743 \pm 0.0004$
Transit duration, T₁₄	$2.74 \pm 0.02$ h
Transit relative depth, $\delta$	$(6.51 \pm 0.07)\times 10^{-3}$
Radius ratio, $R_{\rm p}/R_\star$	$0.075 \pm 0.001$
Scaled semi-major axis, $a/R_\star$	$17.6 \pm 0.4$
Orbital inclination, i	$88.4 \pm 0.1$ $^\circ$
Impact parameter, b	$0.49 \pm 0.04$
Limb-darkening coefficients, u₁, u₂	$0.70 \pm 0.09$ , $0.14 \pm 0.09$
Stellar density, $\rho_\star$	$2.7 \pm 0.1$ g cm^-3
$M_\star^{1/3}/R_\star$	$1.24 \pm 0.03$ (solar units)
Results from radial velocity observations
Radial velocity semi-amplitude, K	$26\pm4$ m s^-1
Orbital eccentricity, e	0 (fixed)
Systemic radial velocity	$-37.468 \pm 0.003$ km s^-1
Results from spectral typing
Spectral type	K1V
Effective temperature, $T_{\rm eff}$	$5080 \pm 80$ K
Surface gravity, $\log g$	$4.58 \pm 0.08$ (cgs)
Metallicity, $[{\rm M}/{\rm H}]$	$0.3 \pm 0.1$
Micro-turbulent velocity, $v_{\rm mic}$	$0.8 \pm 0.2$ km s^-1
Macro-turbulent velocity, $v_{\rm mac}$	$2 \pm 1$ km s^-1
Rotational velocity, $v\sin i$	$2 \pm 1$ km s^-1
Star mass, $M_\star$	$0.88 \pm 0.04 \: {M}_\odot$
Star radius, $R_\star$	$0.77 \pm 0.02 \: {R}_\odot$
Star age	$\le$ 3 Ga
Star distance	$380 \pm 30$ pc
Absolute physical parameters from combined analysis
Planet mass, $M_{\rm p}$	$0.22 \pm 0.03$ ${M}_{\rm J}$
Planet radius, $R_{\rm p}$	$0.57 \pm 0.02$ ${R}_{\rm J}$
Planet density, $\rho_{\rm p}$	$1.6 \pm 0.1$ g cm^-3
Planet orbital semi-major axis, a	$0.063 \pm 0.001$ AU

Source LaTeX | All tables | In the text

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