The SOPHIE northern extrasolar planets. I. A companion close to the planet/brown-dwarf transition around HD16760

Details The SOPHIE northern extrasolar planets. I. A companion close to the planet/brown-dwarf transition around HD16760 The SOPHIE northern extrasolar planets. I. A companion close to the planet/brown-dwarf transition around HD16760

2009-07-21

arxiv.org/abs/0907.3559v1

Astronomy and Astrophysics

Astrophysics

Earth and Planetary Astrophysics

6 pages, 4 figures, accepted for publication in Astronomy and Astrophysics

Scientific paper

We report on the discovery of a substellar companion or a massive Jupiter orbiting the G5V star HD16760 with 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 planet/brown-dwarf transition. Its quite circular orbit supports a formation in a gaseous protoplanetary disk.

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