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标题：A Jovian planet in an eccentric 11.5 day orbit around HD 1397 discovered by TESS
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作者：L. D. Nielsen ; F. Bouchy ; O. Turner 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：10.1051/0004-6361/201834577
语种：English
出版社：EDP Sciences
摘要：The Transiting Exoplanet Survey Satellite TESS has begun a new age of exoplanet discoveries around bright host stars. We present the discovery of HD 1397b (TOI-120.01), a giant planet in an 11.54-day eccentric orbit around a bright (V= 7.9) G-type subgiant. We estimate both host star and planetary parameters consistently usingEXOFASTv2based on TESS time-series photometry of transits and radial velocity measurements with CORALIE and MINERVA-Australis. We also present high angular resolution imaging with NaCo to rule out any nearby eclipsing binaries. We find that HD 1397b is a Jovian planet, with a mass of 0.415 ± 0.020MJand a radius of 1.026 ± 0.026RJ. Characterising giant planets in short-period eccentric orbits, such as HD 1397b, is important for understanding and testing theories for the formation and migration of giant planets as well as planet-star interactions.
关键词：Key wordsenplanets and satellites: detectionplanets and satellites: individual: HD 1397bplanets and satellites: individual: TOI-120planets and satellites: individual: 394137592