RESEARCH
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The SOPHIE search for northern extrasolar planets.
X. Detection and characterization of giant planets by the dozen

G. Hébrard, L. Arnold, T. Forveille, A. C. M. Correia, J. Laskar, X. Bonfils, I. Boisse, R. F. Díaz, J. Hagelberg, J. Sahlmann, N. C. Santos, N. Astudillo-Defru, S. Borgniet, F. Bouchy, V. Bourrier, B. Courcol, X. Delfosse, M. Deleuil, O. Demangeon, D. Ehrenreich, J. Gregorio, N. Jovanovic, O. Labrevoir, A.-M. Lagrange, C. Lovis, J. Lozi, C. Moutou, G. Montagnier, F. Pepe, J. Rey, A. Santerne, D. Ségransan, S. Udry, M. Vanhuysse, A. Vigan, P. A. Wilson

Abstract
We present new radial velocity measurements of eight stars that were secured with the spectrograph SOPHIE at the 193 cm telescope of the Haute-Provence Observatory. The measurements allow detecting and characterizing new giant extrasolar planets. The host stars are dwarfs of spectral types between F5 and K0 and magnitudes of between 6.7 and 9.6; the planets have minimum masses Mp sin i of between 0.4 to 3.8 MJup and orbitalperiods of several days to several months. The data allow only single planets to be discovered around the first six stars (HD 143105, HIP 109600, HD 35759, HIP 109384, HD 220842, and HD 12484), but one of them shows the signature of an additional substellar companion in the system. The seventh star, HIP 65407, allows the discovery of two giant planets that orbit just outside the 12:5 resonance in weak mutual interaction. The last star, HD 141399, was already known to host a four-planet system; our additional data and analyses allow new constraints to be set on it. We present Keplerian orbits of all systems, together with dynamical analyses of the two multi-planet systems. HD 143105 is one of the brightest stars known to host a hot Jupiter, which could allow numerous follow-up studies to be conducted even though this is not a transiting system. The giant planets HIP 109600b, HIP 109384b, and HD 141399c are located in the habitable zone of their host star.

Keywords
planetary systems, techniques: radial velocities, techniques: photometric

Notes
Based on observations collected with the SOPHIE spectrograph on the 1.93-m telescope at Observatoire de Haute-Provence (CNRS), France, by the SOPHIE Consortium (programs 07A.PNP.CONS to 15A.PNP.CONS).

Full version of the SOPHIE measurements (Table 1) is only available at the CDS via anonymous ftp to http://cdsarc.u-strasbg.fr (ftp://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/588/A145

Astronomy and Astrophysics
Volume 588, Article Number A145, Number of pages 20
2016 April

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Instituto de Astrofísica e Ciências do Espaço Universidade do Porto Faculdade de Ciências da Universidade de Lisboa
Fundação para a Ciência e a Tecnologia COMPETE 2020 PORTUGAL 2020 União Europeia