文章基本信息

标题：A Wide-orbit Exoplanet OGLE-2012-BLG-0838Lb
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作者：R.Poleski ; Daisuke Suzuki ; A.Udalski 等
期刊名称：The Astronomical journal
印刷版ISSN：0004-6256
电子版ISSN：1538-3881
出版年度：2020
卷号：159
期号：6
页码：3630-3645
DOI：10.3847/1538-3881/ab8a49
语种：English
出版社：American Institute of Physics
摘要：We present the discovery of a planet on a very wide orbit in the microlensing event OGLE-2012-BLG-0838.The signal of the planet is well separated from the main peak of the event and the planet–star projected separation is found to be twice the Einstein ring radius, which corresponds to a projected separation of ≈4 au.Similar planets around low-mass stars are very hard to find using any technique other than microlensing.We discuss microlensing model fitting in detail and discuss the prospects for measuring the mass and distance of the lens system directly.
关键词：Gravitational microlensing;Exoplanet detection methods;Extrasolar ice giants