INVESTIGADORES
DIAZ Rodrigo Fernando
artículos
Título:
SOPHIE velocimetry of Kepler transit candidates. IV. KOI-196b: a non-inflated hot Jupiter with a high albedo
Autor/es:
A. SANTERNE; A. S. BONOMO; G. HÉBRARD; M. DELEUIL; C. MOUTOU; J. M. ALMENARA; F. BOUCHY; R. F. DÍAZ
Revista:
ASTRONOMY AND ASTROPHYSICS
Editorial:
EDP SCIENCES S A
Referencias:
Lugar: Paris; Año: 2011 vol. 536 p. 1 - 8
ISSN:
0004-6361
Resumen:
We report the discovery of a new hot-Jupiter, KOI-196b, transiting a
solar-type star with an orbital period of 1.855558 days ± 0.6 s
thanks to public photometric data from the Kepler space mission and new
radial velocity observations obtained by the SOPHIE spectrograph mounted
on the 1.93-m telescope at the Observatoire de Haute-Provence, France.
The planet KOI-196b, with a radius of 0.89 ± 0.05 RJup
and a mass of 0.55 ± 0.09 MJup, orbits a G6V star with
R⋆ = 1.02 ± 0.03 Rsun,
M⋆ = 1.12 ± 0.07 Msun, [Fe/H] = 0.29
± 0.16 dex, Teff = 5620 ± 140 K, and an age of
650 +2500-300} Myr. KOI-196b is one of the
rare close-in hot Jupiters with a radius smaller than Jupiter suggesting
that it is a non-inflated planet. The high precision of the Kepler
photometry permits us to detect the secondary transit with a depth of
64 +10-12} ppm as well as the optical phase
variation. We find a geometric albedo of Ag = 0.30 ±
0.08, which is higher than most of the transiting hot Jupiters with a
measured Ag. Assuming no heat recirculation, we find a
day-side temperature of Tday = 1730 ± 400 K. The
planet KOI-196b seems to be one of the rare hot Jupiters located in the
short-period hot-Jupiter desert.