The SOPHIE search for northern extrasolar planets. III. A Jupiter-mass companion around HD 109246

I. BOISSE; A. EGGENBERGER; N. C. SANTOS; C. LOVIS; F. BOUCHY; G. HÉBRARD; L. ARNOLD; X. BONFILS; X. DELFOSSE; M. DESORT; R. F. DÍAZ; D. EHRENREICH; T. FORVEILLE; A. GALLENNE; A. M. LAGRANGE; C. MOUTOU; S. UDRY; F. PEPE; C. PERRIER; S. PERRUCHOT; F. PONT; D. QUELOZ; A. SANTERNE; D. SÉGRANSAN; A. VIDAL-MADJAR

ASTRONOMY AND ASTROPHYSICS

EDP SCIENCES S A

Lugar: Paris; Año: 2010 vol. 523 p. 1 - 9

0004-6361

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 HD 109246, a G0V star slightly more metallic than the Sun. HD 109246b 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 (v sin i, [Fe/H], log R?HK) directly from the SOPHIE data.