Binarity of transit host stars - Implications for planetary parameters

  title={Binarity of transit host stars - Implications for planetary parameters},
  author={S. Daemgen and Felix Hormuth and Wolfgang Brandner and Carolina Bergfors and Markus Janson and Stefan Hippler and Th. Henning},
  journal={Astronomy and Astrophysics},
Context. Straight-forward derivation of planetary parameters can only be achieved in transiting planetary systems. However, planetary attributes such as radius and mass strongly depend on stellar host parameters. Discovering a transit host star to be multiple leads to a necessary revision of the derived stellar and planetary parameters. Aims. Based on our observations of 14 transiting exoplanet hosts, we derive parameters of the individual components of three transit host stars (WASP-2, TrES-2… 

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