The ELODIE survey for northern extra-solar planets

A. C. M. Correia; S. Udry; M. Mayor; A. Eggenberger; D. Naef; J.-L. Beuzit; C. Perrier; D. Queloz; J.-P. Sivan; F. Pepe; N. C. Santos; D. Ségransan

doi:10.1051/0004-6361:20078908

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Volume 479 / No 1 (February III 2008)

A&A, 479 1 (2008) 271-275

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Issue		A&A Volume 479, Number 1, February III 2008


Page(s)		271 - 275
Section		Planets and planetary systems
DOI		https://doi.org/10.1051/0004-6361:20078908
Published online		12 December 2007

A&A 479, 271-275 (2008)

IV. HD 196885, a close binary star with a 3.7-year planet

A. C. M. Correia¹^,2, S. Udry², M. Mayor², A. Eggenberger³^,2, D. Naef⁴, J.-L. Beuzit³, C. Perrier³, D. Queloz², J.-P. Sivan⁵, F. Pepe⁵, N. C. Santos⁶^,2 and D. Ségransan⁵

¹ Departamento de Física da Universidade de Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal e-mail: correia@ua.pt
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

Received: 23 October 2007
Accepted: 28 November 2007

Abstract

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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