The TRAPPIST survey of southern transiting planets – Physical properties of the WASP-36 planetary system (poster)

We present ten new transit light curves obtained with the TRAPPIST (TRAnsiting Planets and PlanetesImals Small Telescope) and Euler telescopes for the recently discovered planetary system WASP-36 (Smith et al. 2012). Thanks to this extensive data set, we are able to confirm and improve the parameters of the system. WASP-36 is a solar-mass G2 dwarf which hosts a giant planet on a 1.54 d orbit. With a mass of ~2.3 MJup and a radius of ~1.3 RJup, this planet is slightly denser than Jupiter. One of the most interesting properties of the system is its low stellar metallicity ([Fe/H] =-0.26+-0.10), as giant planets are actually known to be rare around such stars (e.g. Fischer & Valenti 2005). Furthermore, due to its small orbital distance and large radius, WASP-36b is an exquisite target for spectrophotometric emission measurements able to constrain the thermal and chemical properties of its atmosphere.