A&A 464, 1133-1138 (2007)
Detecting companions to extrasolar planets using mutual eventsJ. Cabrera and J. Schneider
Observatoire de Paris-Meudon, 92195 Meudon Cedex, France
(Received 26 July 2006 / Accepted 22 December 2006)
Abstract Key words:
Aims.We investigate a new approach to the detection of companions to
extrasolar planets beyond the transit method. We discuss the
possibility of the existence of "binary planets".
Methods.We develop a method based on the imaging of a planet-companion as an
unresolved system (but resolved from its parent star). It makes use
of planet-companion "mutual phenomena", namely mutual transits
and mutual shadows.
Results.We show that companions can be detected and their radius measured
down to lunar sizes.
stars: planetary systems --
© ESO 2007
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