文章基本信息

标题：KMT-2018-BLG-1292: A Super-Jovian Microlens Planet in the Galactic Plane
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作者：Yoon-Hyun Ryu ; Maria Gabriela Navarro ; Andrew Gould 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：2
页码：814-829
DOI：10.3847/1538-3881/ab5e7e
语种：English
出版社：American Institute of Physics
摘要：We report the discovery of KMT-2018-BLG-1292Lb, a super-Jovian Mplanet = 5.0 ± 1.2 MJ planet orbiting an F or G dwarf Mhost = 1.2 ± 0.3 M⊙, which lies physically within ${ \mathcal O }(10\,\mathrm{pc})$ of the Galactic plane.The source star is a heavily extincted AI ~ 5.2 luminous giant that has the lowest Galactic latitude, b = −0fdg28, of any planetary microlensing event.The relatively blue blended light is almost certainly either the host or its binary companion, with the first explanation being substantially more likely.This blend dominates the light at the I band and completely dominates at the R and V bands.Hence, the lens system can be probed by follow-up observations immediately, i.e., long before the lens system and the source separate due to their relative proper motion.The system is well characterized despite the low cadence, Γ = 0.15–0.20 hr−1, of observations and short viewing windows near the end of the bulge season.This suggests that optical microlensing planet searches can be extended to the Galactic plane at relatively modest cost.
关键词：Gravitational;microlensing