Protostars and Planets VI, Heidelberg, July 15-20, 2013
Searching for additional companions to WASP planets
Neveu, Marion (Observatoire de Genève)
Queloz, Didier (Cavendish Laboratory, Observatoire de Genève)
Triaud, Amaury (Kavli Institute for Astrophysics & Space Research)
Ségransan, Damien (Observatoire de Genève)
Since 2007 an intense follow up is established with the spectrograph CORALIE to observe WASP transiting candidates. In parallel a special effort has been carried out to keep observing them to look for long-term radial velocity variabilities suggesting the presence of additional stellar or planetary companions.
Hot Jupiter planets are special objects that challenge planets formation mechanisms. It is currently thought that only violent mechanisms related to planet interactions and dynamical secular effects from another companion may explain the emergence of such objects. Thenceforth, we should observe an unusual rate of companions in these systems. Preliminary results from the program are presented, related to the statistics of companions around WASP planets.
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