EsPaDONs exploring the star-planet interactions
Moutou C, Donati JF, et al

Abstract: Extrasolar planets with very short periods are continuously discovered. At only a few stellar radii from their parent star, these giant planets are strongly irradiated and fully embedded in the stellar magnetosphere. Spectropolarimetric observations of such systems are the unique tool for exploring the star-planet interaction involving magnetic or tidal processes, such as induced activity and planetary imprint on the stellar surface. We will present first results obtained with EsPaDONs on HD189733, a transiting 2.2d period planetary system, and discuss future expectations for a survey of Hot Jupiter systems.