The ELODIE survey for northern extra-solar planets IV. HD196885, a close binary star with a 3.7-year planet

Authors :: Correia, A. C. M.
Udry, S.
Mayor, M.
Eggenberger, A.
Naef, D.
Beuzit, J. -L.
Perrier, C.
Queloz, D.
Sivan, J. -P.
Pepe, F.
Santos, N. C.
Ségransan, D.
Source :: Astron.Astrophys. 479:271-275 (2008)
Publication Year :: 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 386 -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.<br />Comment: 5 pages, 4 figures, 3 tables

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