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

TL;DR

This paper reports the discovery of a substellar companion near the planet/brown-dwarf boundary orbiting HD16760, providing insights into its characteristics and formation, using the SOPHIE spectrograph.

Contribution

First detection of a massive Jupiter-like companion near the planet/brown-dwarf transition around HD16760 with detailed spectroscopic analysis.

Findings

Minimum mass of 14.3 Jupiter masses

Orbital period of 465 days

Eccentricity of 0.067

Abstract

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.