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标题：Tracking Advanced Planetary Systems (TAPAS) with HARPS-N - IV. TYC 3667-1280-1: The most massive red giant star hosting a warm Jupiter
其他标题：IV. TYC 3667-1280-1: The most massive red giant star hosting a warm Jupiter
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作者：A. Niedzielski ; A. Niedzielski ; E. Villaver 等
期刊名称：Astronomy & Astrophysics
印刷版ISSN：0004-6361
电子版ISSN：1432-0746
出版年度：2016
卷号：589
页码：1-5
DOI：10.1051/0004-6361/201628417
语种：English
出版社：EDP Sciences
摘要：Context. We present the latest result of the TAPAS project that is devoted to intense monitoring of planetary candidates that are identified within the PennState-Toruń planet search. Aims. We aim to detect planetary systems around evolved stars to be able to build sound statistics on the frequency and intrinsic nature of these systems, and to deliver in-depth studies of selected planetary systems with evidence of star-planet interaction processes. Methods. The paper is based on precise radial velocity measurements: 13 epochs collected over 1920 days with the Hobby-Eberly Telescope and its High-Resolution Spectrograph, and 22 epochs of ultra-precise HARPS-N data collected over 961 days. Results. We present a warm-Jupiter (Teq = 1350 K, m2 sin i = 5.4 ± 0.4 MJ) companion with an orbital period of 26.468 days in a circular (e = 0.036) orbit around a giant evolved (log g = 3.11 ± 0.09, R = 6.26 ± 0.86 R⊙) star with M⋆ = 1.87 ± 0.17 M⊙. This is the most massive and oldest star found to be hosting a close-in giant planet. Its proximity to its host (a = 0.21 au) means that the planet has a 13.9 ± 2.0% probability of transits; this calls for photometric follow-up study. Conclusions. This massive warm Jupiter with a near circular orbit around an evolved massive star can help set constraints on general migration mechanisms for warm Jupiters and, given its high equilibrium temperature, can help test energy deposition models in hot Jupiters.
关键词：planets and satellites: detection;planets and satellites: individual: TYC 3667-1280-1 b;planet-star interactions;stars: late-type