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Brahm, R; Espinoza, N; Jordán, A; Rojas, F; Sarkis, P; Díaz, M R; Rabus, M; Drass, H; Lachaume, R; Soto, M G; Jenkins, J S; Jones, M I; Henning, Th; Pantoja, B; Vučković, M
Monthly Notices of the Royal Astronomical Society, 06/2018, Volume: 477, Issue: 2Journal Article
Abstract We report the discovery of K2-232 b using photometric data of the Kepler K2 satellite coupled with ground-based spectroscopic observations. K2-232 b has a mass of MP = 0.397 ± 0.037 MJ, a radius of RP = 1.00 ± 0.020 RJ, and a moderately low equilibrium temperature of Teq = 1030 ± 15 K due to its relatively large star–planet separation of a = 0.1036 au. K2-232 b orbits its bright (V = 9.9) late F-type host star in an eccentric orbit (e = 0.258 ± 0.025) every 11.2 d, and is one of only four well-characterized warm Jupiters having host stars brighter than V = 10. We estimate a heavy element content of 20 ± 7 M⊕ for K2-232 b, which is consistent with standard models of giant planet formation. The bright host star of K2-232 b makes this system a well-suited target for detailed follow-up observations that will aid in the study of the atmospheres and orbital evolution of giant planets at moderate separations from their host stars.
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