The SOPHIE search for northern extrasolar planets

X. Detection and characterization of giant planets by the dozen^⋆,⋆⋆

¹ Institut d’Astrophysique de Paris, UMR 7095 CNRS, Université Pierre & Marie Curie, 98bis boulevard Arago, 75014 Paris, France
e-mail: hebrard@iap.fr
² Observatoire de Haute-Provence, CNRS, Université d’Aix-Marseille, 04870, Saint-Michel-l’Observatoire, France
³ Université J. Fourier (Grenoble 1)/CNRS, Laboratoire d’Astrophysique de Grenoble (LAOG, UMR 5571), 38041 Saint-Martin d’Hères, France
⁴ CIDMA, Departamento de Física, Universidade de Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
⁵ ASD/IMCCE, CNRS-UMR 8028, Observatoire de Paris, PSL, UPMC, 77 Avenue Denfert-Rochereau, 75014 Paris, France
⁶ Aix Marseille Université, CNRS, LAM (Laboratoire d’Astrophysique de Marseille) UMR 7326, 13388 Marseille, France
⁷ Observatoire de Genève, Université de Genève, 51 Chemin des Maillettes, 1290 Sauverny, Switzerland
⁸ Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822, USA
⁹ European Space Agency, European Space Astronomy Centre, PO Box 78, Villanueva de la Canada, 28691 Madrid, Spain
¹⁰ Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Rua das Estrelas, 4150-762 Porto, Portugal
¹¹ Departamento de Física e Astronomia, Faculdade de Ciências, Universidade do Porto, Rua Campo Alegre, 4169-007 Porto, Portugal
¹² Atalaia Group, CROW-Observatory Portalegre, 4169-007 Porto, Portugal
¹³ National Astronomical Observatory of Japan, Subaru Telescope, 650 North A’Ohoku Place, Hilo, HI, 96720, USA
¹⁴ Department of Physics and Astronomy, Macquarie University, NSW 2109, Australia
¹⁵ Centre d’Astronomie, Plateau du Moulin à Vent, 04870 Saint-Michel-l’Observatoire, France
¹⁶ Canada France Hawaii Telescope Corporation, Kamuela, HI 96743, USA
¹⁷ Oversky, 47 Allée des Palanques, 33127 Saint-Jean-d’Illac, France

Received: 17 October 2015
Accepted: 13 February 2016

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 M_p sin i of between 0.4 to 3.8 M_Jup 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.