The Hipparcos observations and the mass of sub-stellar objects*
Institut d'Astronomie et d'Astrophysique, Université Libre de Bruxelles, CP 226, boulevard du Triomphe, 1050 Bruxelles, Belgium
2 Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544-1001, USA
Corresponding author: D. Pourbaix, email@example.com
Accepted: 16 February 2001
The Hipparcos Intermediate Astrometric Data have been used lately to estimate the inclination of the orbital plane of candidate extrasolar planets. Whereas most of these investigations derive almost face-on orbits, we show that the astrometric data are seldom precise enough to undertake such studies and that the "face-on"result might be just a spurious effect of the method.
Key words: methods: data analysis / astrometry / stars: planetary systems
© ESO, 2001