New Jovian, HD 109246 b, from SOPHIE

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New Jovian, HD 109246 b, from SOPHIE

Post by Sirius_Alpha on 27th June 2010, 8:11 pm

The SOPHIE search for northern extrasolar planets III. A Jupiter-mass companion around HD 109246
http://arxiv.org/abs/1006.4984

Abstract wrote:We report the detection of a Jupiter-mass planet discovered with the SOPHIE spectrograph mounted on the 1.93-m telescope at the Haute-Provence Observatory. The new planet orbits HD109246, a G0V star slightly more metallic than the Sun. HD109246b has a minimum mass of 0.77 MJup, an orbital period of 68 days, and an eccentricity of 0.12. It is placed in a sparsely populated region of the period distribution of extrasolar planets. We also present a correction method for the so-called seeing effect that affects the SOPHIE radial velocities. We complement this discovery announcement with a description of some calibrations that are implemented in the SOPHIE automatic reduction pipeline. These calibrations allow the derivation of the photon-noise radial velocity uncertainty and some useful stellar properties (vsini, [Fe/H], logR'HK) directly from the SOPHIE data.

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