Volume 479, Number 1, February III 2008
|Page(s)||271 - 275|
|Section||Planets and planetary systems|
|Published online||12 December 2007|
The ELODIE survey for northern extra-solar planets
IV. HD 196885, a close binary star with a 3.7-year planet
Departamento de Física da Universidade de Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal e-mail: firstname.lastname@example.org
2 Observatoire de Genève, 51 Ch. des Maillettes, 1290 Sauverny, Switzerland
3 Laboratoire d'Astrophysique de Grenoble, Université Joseph Fourier, BP 53, 38041 Grenoble Cedex 9, France
4 European Southern Observatory, Casilla 19001, Santiago 19, Chile
5 Laboratoire d'Astrophysique de Marseille, Traverse du Siphon BP 8, 13376 Marseille Cedex 12, France
6 Centro de Astrofísica da Universidade do Porto, Rua das Estrelas, 4150-762 Porto, Portugal
Accepted: 28 November 2007
Aims.We aim to significantly increase the number of detected extra-solar planets in a magnitude-limited sample to improve our knowledge of their orbital element distributions and thus obtain better constraints for planet-formation models.
Methods.Radial-velocity data were taken at Haute-Provence Observatory (OHP, France) with the ELODIE echelle spectrograph.
Results.We report the presence of a planet orbiting HD 196885 A, with an orbital period of 1349 days. This star was previously suggested to host a -day planet, but we cannot confirm its existence. We also detect the presence of a stellar companion, HD 196885 B, and give some constraints on its orbit.
Key words: stars: individual: HD 196885 A / stars: individual: HD 196885 B / stars: binaries: visual / stars: planetary systems / techniques: radial velocities / methods: observational
© ESO, 2008
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