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Centro de Astrofísica da Universidade do Porto

The SOPHIE search for northern extrasolar planets

F. Bouchy, G. Hébrard, S. Udry, X. Delfosse, I. Boisse, M. Desort, X. Bonfils, A. Eggenberger, D. Ehrenreich, T. Forveille, A.-M. Lagrange, H. Le Coroller, C. Lovis, C. Moutou, F. Pepe, C. Perrier, F. Pont, D. Queloz, N. C. Santos, D. Ségransan, A. Vidal-Madjar

We report on the discovery of a substellar companion or a massive Jupiter orbiting the G5V star HD16760 using the spectrograph SOPHIE installed on the OHP 1.93-m telescope. Characteristics and performances of the spectrograph are presented, as well as the SOPHIE exoplanet consortium program. With a minimum mass of 14.3 MJup, an orbital period of 465 days and an eccentricity of 0.067, HD16760b seems to be located just at the end of the mass distribution of giant planets, close to the planet/brown-dwarf transition. Its quite circular orbit supports a formation in a gaseous protoplanetary disk.

planetary systems - techniques: radial velocities - stars: individual: HD 16760

* Based on observations made with SOPHIE spectrograph on the 1.93-m telescope at Observatoire de Haute-Provence (CNRS/OAMP), France (program 07A.PNP.CONS).
** Table 2 is also available in electronic form at the CDS via anonymous ftp to ( or via

Astronomy and Astrophysics
Volume 505, Page 853
October 2009

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