LESIA - Observatoire de Paris

Exoplanets by direct imaging : from discovery to characterization

jeudi 8 mars 2012, par Philippe Delorme (Institut de Planétologie et d’Astrophysique de Grenoble)

Mardi 13 mars 2012 à 11h00 , Lieu : Salle de conférence du bât. 17

I will present my work on exoplanet detection by Adaptive Optics imaging around young M dwarfs of the solar neighbourhood. The aim was to constrain the planetary formation mechanisms around low mass stars. I will highlight how we achieved an unprecedented systematical sensitivity to Jupiter mass companions from 5-200AU but unfortunately found none. However, I found a 2-6 young Jupiter mass substellar object, quite prototypical of the companions we hope to discover by AO imaging, but in the wide-field survey for brown dwarfs CFBDSIR, not with AO imaging. I will present the full spectroscopical analysis of this probable free-floating planet, the determination of its physical parameters and show how it could serve as a prototype for the exoplanets that will be discovered by SPHERE and GPI.