Abstract
The search for planets in multiple systems allows to improve our knowledge of planet formation and evolution. On one hand, the frequency of planets in binary systems has a strong effect on the global frequency of planets, as more than half of solar-type stars are in binary or multiple systems (Duquennoy and Mayor 1991). On the other hand, the properties of planets in binaries, and their differences with the properties of the planets orbiting single stars, would shed light on the effects caused by the presence of the companion stars. Indeed, the first analysis of the properties of planets in binaries showed the occurrence of some differences with respect to those orbiting single stars (Zucker and Mazeh 2002; Eggenberger et al. 2004).
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