Mathematics – Dynamical Systems
Scientific paper
Jan 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005esasp.576..263s&link_type=abstract
"Proceedings of the Gaia Symposium "The Three-Dimensional Universe with Gaia" (ESA SP-576). Held at the Observatoire de Paris-Me
Mathematics
Dynamical Systems
Planetary Systems, Dynamical Systems, Perturbations
Scientific paper
The first extra-solar planets have been detected by the measurement of the wobble of the parent star. This wobble leads to the periodic modulation of three observables: radial velocity, position on the sky and time of arrival of periodic signals. I show that the same wobble, and therefore the same modulation of the three observables, can be due to the presence of a distant binary stellar companion. Thus, the observation of the wobble does not, by itself, constitute a proof of a planet detection; in particular, astrometric confirmation of a wobble does not necessarily provide a sufficient proof of the existence of a planet candidate detected by radial velocity; additional conditions must be fulfilled. I investigate the observed wobble for the planet candidates detected up to now by radial velocity and find that, for each case, a wobble due to a binary stellar companion can be excluded.
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