文章基本信息

标题：SOPHIE velocimetry of Kepler transit candidates
其他标题：XIX. The transiting temperate giant planet KOI-3680b
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作者：G. Hébrard ; A. S. Bonomo ; R. F. Díaz 等
期刊名称：Astronomy & Astrophysics
印刷版ISSN：0004-6361
电子版ISSN：1432-0746
出版年度：2019
卷号：623
DOI：10.1051/0004-6361/201834333
语种：English
出版社：EDP Sciences
摘要：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 theKeplerteam as a promising candidate from the photometry of theKeplerspacecraft, 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 ± 0.20MJup, and a radius of 0.99 ± 0.07RJup. 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.
关键词：Key wordsenplanetary systemstechniques: radial velocitiestechniques: photometrictechniques: spectroscopicstars: individual: KOI-3680