SOPHIE velocimetry of Kepler transit candidates - XVI. Tomographic measurement of the low obliquity of KOI-12b, a warm Jupiter transiting a fast rotator

V. Bourrier; A. Lecavelier des Etangs; G. Hébrard; A. Santerne; M. Deleuil; J. M. Almenara; S. C. C. Barros; I. Boisse; A. S. Bonomo; G. Bruno; B. Courcol; R. F. Diaz; G. Montagnier; C. Moutou

doi:10.1051/0004-6361/201525750

Home

All issues

Volume 579 (July 2015)

A&A, 579 (2015) A55

Full HTML

Free Access

Table 5

Transit light curve and radial velocity analysis.

Parameter	Symbol	Value	Unit

Eccentric orbit

Orbital parameters
Orbital period	P	17.8552333 ±0.9 × 10^-6	day
Transit epoch	T₀	2 454 979.59599 ±2.7 × 10^-4	BJD
Eccentricity	e	<0.72 (3σ)
Argument of periastron	ω	228 ± 120	deg
Scaled semi-major axis	a_p/R_⋆	20.0 ± 1.5
Semi-major axis	a_p	0.151 ±3 × 10^-3	au
Orbital inclination	i_p	88.95	deg
Impact parameter	b	0.3629 ±6.4 × 10^-3
Planet-to-star radii ratio	R_p/R_⋆	0.09049 ±8 × 10^-5
Planet radius	R_p	1.43 ± 0.13	R_Jup
Transit duration	t_d	6.788	hours
Stellar reflex velocity	K	<0.8 (3σ)	km s^-1
Mass of KOI-12.01	M_p	< 10 (3σ)	M_Jup

Stellar parameters
Density	ρ_⋆	0.335 ± 0.080	ρ_sun
Radius	R_⋆	1.63 ± 0.15	R_sun
Age	ta u_⋆	1.5 ± 0.5	Gyr
Mass	M_⋆	1.452 ± 0.093	M_sun
Distance	D	426 ± 40	pc
Effective temperature	T_eff	6820 ± 120	K
Limb-darkening coefficients	ϵ_a	0.334 ± 0.007
	ϵ_b	0.124 ± 0.013

Circular orbit

Orbital parameters
Orbital period	P	17.8552332 ± 1.0 × 10^-6	day
Transit epoch	T₀	2 454 979.59601 ± 0.5 × 10^-4	BJD
Scaled semi-major axis	a_p/R_⋆	18.84 ± 0.04
Semi-major axis	a_p	0.151 ±3 × 10^-3	au
Orbital inclination	i_p	88.90 ± 0.02	deg
Impact parameter	b	0.362 ±7 × 10^-3
Planet-to-star radii ratio	R_p/R_⋆	0.09049 ±8 × 10^-5
Planet radius	R_p	1.44 ± 0.13	R_Jup
Transit duration	t_d	6.7827 ±2.6 × 10^-3	hours
Stellar reflex velocity	K	<0.51 (3σ)	km s^-1
Mass of KOI-12.01	M_p	<8.7 (3σ)	M_Jup

Stellar parameters
Limb-darkening coefficients	ϵ_a	0.335 ± 0.008
	ϵ_b	0.123 ± 0.014

Notes. All parameters are derived from the analysis of the transit light curve (Sect. 4), except for the limits on the Keplerian semi-amplitude and the mass of KOI-12.01 derived from the radial velocity analysis (Sect. 5.1). The derived Kepler transit epochs are given in Barycentric Dynamical Time.

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.