Stellar wobble caused by a binary system: Can it really be mistaken as an extra-solar planet?
Centro de Física Computacional, Universidade de Coimbra, 3004-516 Coimbra, Portugal e-mail: firstname.lastname@example.org
2 Departamento de Física, Universidade de Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal e-mail: email@example.com
3 IMCCE, CNRS-UMR8028, Observatoire de Paris, UPMC, 77 avenue Denfert-Rochereau, 75014 Paris, France
Accepted: 25 September 2008
The traditional method for detecting extra-solar planets relies on measuring a small stellar wobble which is assumed to be caused by a planet orbiting the star. Recently, it has been suggested that a similar stellar wobble could be caused by a close binary system. Here we show that, although the effect of a close binary system can at first sight be mistaken as a planetary companion to the star, more careful analysis of the observational data should allow us to distinguish between the two effects.
Key words: techniques: radial velocities / methods: observational / celestial mechanics / stars: planetary systems / stars: binaries: general
© ESO, 2008