The SOPHIE search for northern extrasolar planets: VI. Three new hot Jupiters in multi-planet extrasolar systems
C. Moutou, G. Hebrard, F.Bouchy, L. Arnold, N.C. Santos, N., Astudillo-Defru, I. Boisse, X. Bonfils, S. Borgniet, X. Delfosse, R.F. Diaz,, D. Ehrenreich, T. Forveille, J. Gregorio, O. Labrevoir, A.M. Lagrange, G., Montagnier, M. Montalto, F. Pepe, J. Sahlmann, A. Santerne

TL;DR
This study reports the discovery of three new hot Jupiters in multi-planet systems around bright, solar-type stars using high-precision radial-velocity measurements, expanding understanding of planetary system architectures.
Contribution
First detection of multiple giant planets in three bright stars, revealing complex multi-planet systems with detailed orbital parameters and mass estimates.
Findings
HD 13908 hosts a hot Jupiter and a massive outer companion.
HD 159243 contains two giant planets with different periods.
HIP 91258 has a hot Jupiter and an uncharacterized outer companion.
Abstract
We present high-precision radial-velocity measurements of three solar-type stars: HD 13908, HD 159243, and HIP 91258. The observations were made with the SOPHIE spectrograph at the 1.93-m telescope of Observatoire de Haute-Provence (France). They show that these three bright stars host exoplanetary systems composed of at least two companions. HD 13908 b is a planet with a minimum mass of 0.865+-0.035 Mjup, on a circular orbit with a period of 19.382+-0.006 days. There is an outer massive companion in the system with a period of 931+-17 days, e = 0.12+-0.02, and a minimum mass of 5.13+-0.25 Mjup. The star HD 159243, also has two detected companions with respective masses, periods, and eccentricities of Mp = 1.13+-0.05 and 1.9+-0.13 Mjup, = 12.620+-0.004 and 248.4+-4.9 days, and e = 0.02+-0.02 and 0.075+-0.05. Finally, the star HIP 91258 has a planetary companion with a minimum mass…
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Taxonomy
TopicsStellar, planetary, and galactic studies · Astro and Planetary Science · Astronomy and Astrophysical Research
