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We report the validation and characterization of three new transitingexoplanets using SOPHIE radial velocities: KOI-614b, KOI-206b, and KOI-680b.KOI-614b has a mass of $2.86\pm0.35~{\rm M_{Jup}}$ and a radius of$1.13^{+0.26}_{-0.18}~{\rm R_{Jup}}$, and it orbits a G0, metallic([Fe/H]=$0.35\pm0.15$) dwarf in 12.9 days. Its mass and radius are familiar andcompatible with standard planetary evolution models, so it is one of the fewknown transiting planets in this mass range to have an orbital period over tendays. With an equilibrium temperature of $T_{eq}=1000 \pm 45$ K, this placesKOI-614b at the transition between what is usually referred to as "hot" and"warm" Jupiters. KOI-206b has a mass of $2.82\pm 0.52~{\rm M_{Jup}}$ and aradius of $1.45\pm0.16~{\rm R_{Jup}}$, and it orbits a slightly evolved F7-typestar in a 5.3-day orbit. It is a massive inflated hot Jupiter that isparticularly challenging for planetary models because it requires unusuallylarge amounts of additional dissipated energy in the planet. On the other hand,KOI-680b has a much lower mass of $0.84\pm0.15~{\rm M_{Jup}}$ and requires lessextra-dissipation to explain its uncommonly large radius of $1.99\pm0.18~{\rmR_{Jup}}$. It is one of the biggest transiting planets characterized so far,and it orbits a subgiant F9-star well on its way to the red giant stage, withan orbital period of 8.6 days. With host stars of masses of$1.46\pm0.17~M_{\odot}$ and $1.54 \pm 0.09~M_{\odot}$, respectively, KOI-206b,and KOI-680b are interesting objects for theories of formation and survival ofshort-period planets around stars more massive than the Sun. For those twotargets, we also find signs of a possible distant additional companion in thesystem.

astronomy and astrophysics

SOPHIE velocimetry of Kepler transit candidates. XV. KOI-614b, KOI-206b,  and KOI-680b: a massive warm Jupiter orbiting a G0 metallic dwarf and two  highly inflated planets with a distant companion around evolved F-type stars