How the knowledge of stellar activity is needed for the exoplanetary field (and how the exoplanetary research helps the stellar dynamo understanding)

Boisse Isabelle, isabelle.boisse@astro.up.pt, Centro de Astrofisica da Universidade do Porto, Portugal
Oshagh Mahmoudreza, moshagh@astro.up.pt, Centro de Astrofisica da Universidade do Porto
Lovis Christophe, Geneva Observatory
Santos Nuno C., Centro de Astrofisica da Universidade do Porto
Dumusque Xavier, Geneva Observatory
Bonfils Xavier, IPAG (Grenoble, France)
Montalto Marco, Centro de Astrofisica da Universidade do Porto
Boue Gwenael, Centro de Astrofisica da Universidade do Porto


Abstract
The exoplanetary surveys need to have a good knowledge of the magnetic activity (in RV or in photometry). For example, they have to understand the main shape of stellar activity and spots properties to choose the best targets for the search of low-mass planets in the habitable zone of their stars (Boisse et al. 2011, Dumusque et al. 2011) or to derive the good parameters from the transit observations (Boisse et al. in prep., Oshagh et al. in prep.). With that aim, these studies lead them to already give clues on properties of the magnetic activity like the active cycles (Lovis et al. 2011) or on active longitudes (Sanchis-Ojeda et al. 2011).