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Astron. Astrophys. 354, 99-102 (2000)
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The CORALIE survey for southern extra-solar planets
I. A planet orbiting the star Gliese 86 *
D. Queloz 1,2,
M. Mayor 1,
L. Weber 1,
A. Blécha 1,
M. Burnet 1,
B. Confino 3,
D. Naef 1,
F. Pepe 1,
N. Santos 1 and
S. Udry 1
1 Observatoire de Genève, 51 ch. des Maillettes, 1290 Sauverny, Switzerland
2 Jet Propulsion Laboratory, Mail-Stop: 306-388, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
3 St-Luc Observatory, Switzerland
Received 22 April 1999 / Accepted 1 October 1999
Abstract
A 4 MJ planet with a 15.8 day orbital period has been detected from very precise radial velocity measurements with the CORALIE echelle spectrograph. A second remote and more massive companion has also been detected.
All the planetary companions so far detected in orbit closer than 0.08 AU have a parent star with a statistically higher metal content compared to the metallicity distribution of other stars with planets. Different processes occuring during their formation may provide a possible explanation for this observation.
Key words: stars: planetary
systems 
stars: individual:
GJ 86
stars: low-mass, brown
dwarfs
stars: binaries: spectroscopic
* Based on observations collected at the La Silla Observatory, ESO Chile, with the echelle spectrograph CORALIE at the 1.2m Euler Swiss telescope
Send offprint requests to: Didier.Queloz@obs.unige.ch
© European Southern Observatory (ESO) 2000
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