Orbital characterization of giant exoplanets and brown dwarfs with the VLT planet finder SPHERE

Séminaire IPAG de Anne-Lise Maire (MPIA Heidelberg), jeudi 5 avril 2018 à 11h00, salle Manuel Forestini IPAG

Astrometric monitoring of directly imaged exoplanets and brown dwarfs allows the study of their orbital parameters and system architectures. Because of the long orbital periods and/or faintness of these objects, accurate astrometry is challenging when based on data acquired on timescales of a few years. The new high-contrast imaging instrument VLT/SPHERE provides exquisite contrasts and astrometric accuracies down to about 1 mas thanks to its dedicated design and the use of optimized observational strategy. We will present the results of the astrometric monitorings of the brown dwarf HR2562 B and giant exoplanet 51 Eridani b monitored as part of the SPHERE consortium exoplanet imaging survey.