SOPHIE velocimetry of Kepler transit candidates: XIX. the transiting temperate giant planet KOI-3680b

Whereas thousands of transiting giant exoplanets are known today, only a few are well characterized with long orbital periods. Here we present KOI-3680b, a new planet in this category. First identified by the Kepler team as a promising candidate from the photometry of the Kepler spacecraft, we estab...

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Detalles Bibliográficos
Autores principales: Hébrard, G., Bonomo, A.S., Díaz, R.F., Santerne, A., Santos, N.C., Almenara, J.-M., Barros, S.C.C., Boisse, I., Bouchy, F., Bruno, G., Courcol, B., Deleuil, M., Demangeon, O., Guillot, T., Montagnier, G., Moutou, C., Rey, J., Wilson, P.A.
Formato: JOUR
Materias:
Planetary systems
Stars: individual: KOI-3680
Techniques: photometric
Techniques: radial velocities
Techniques: spectroscopic
Extrasolar planets
Photometry
Stars
Planetary system
Stars: individual
Orbits
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00046361_v623_n_p_Hebrard
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
Descripción
Sumario:Whereas thousands of transiting giant exoplanets are known today, only a few are well characterized with long orbital periods. Here we present KOI-3680b, a new planet in this category. First identified by the Kepler team as a promising candidate from the photometry of the Kepler spacecraft, we establish here its planetary nature from the radial velocity follow-up secured over 2 yr with the SOPHIE spectrograph at Observatoire de Haute-Provence, France. The combined analysis of the whole dataset allows us to fully characterize this new planetary system. KOI-3680b has an orbital period of 141.2417 ± 0.0001 days, a mass of 1.93 ± 0.20 M Jup , and a radius of 0.99 ± 0.07 R Jup . It exhibits a highly eccentric orbit (e = 0.50 ± 0.03) around an early G dwarf. KOI-3680b is the transiting giant planet with the longest period characterized so far around a single star; it offers opportunities to extend studies which were mainly devoted to exoplanets close to their host stars, and to compare both exoplanet populations. © 2019 ESO.

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