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The SOPHIE search for northern extrasolar planets XII.
Three giant planets suitable for astrometric mass determination with Gaia

J. Rey, G. Hébrard, F. Bouchy, V. Bourrier, I. Boisse, N. C. Santos, L. Arnold, N. Astudillo, X. Bonfils, S. Borgniet, B. Courcol, M. Deleuil, X. Delfosse, O. Demangeon, R. F. Díaz, D. Ehrenreich, T. Forveille, M. Marmier, C. Moutou, F. Pepe, A. Santerne, J. Sahlmann, D. Segransan, S. Udry, P. A. Wilson

We present new radial velocity measurements for three low-metallicity solar-like stars observed with the SOPHIE spectrograph and its predecessor ELODIE, both installed at the 193 cm telescope of the Haute-Provence Observatory, allowing the detection and characterization of three new giant extrasolar planets in intermediate periods of 1.7 to 3.7 yr. All three stars, HD17674, HD42012 and HD29021 present single giant planetary companions with minimum masses between 0.9 and 2.5 MJup. The range of periods and masses of these companions, along with the distance of their host stars, make them good targets to look for astrometric signals over the lifetime of the new astrometry satellite Gaia. We discuss the preliminary astrometric solutions obtained from the first Gaia data release.

techniques: radial velocities; planetary systems; brown dwarfs; stars: individual: HD 17674; stars: individual: HD 29021; stars: individual: HD 42012; Astrophysics - Earth and Planetary Astrophysics

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.

Astronomy & Astrophysics
Volume 601, Article Number A9, Number of pages 9
2017 May

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