文章基本信息

标题：KMT-2016-BLG-1836Lb: A Super-Jovian Planet from a High-cadence Microlensing Field
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作者：Hongjing Yang ; Xiangyu Zhang ; Kyu-Ha Hwang 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：3
页码：1325-1337
DOI：10.3847/1538-3881/ab660e
语种：English
出版社：American Institute of Physics
摘要：We report the discovery of a super-Jovian planet in the microlensing event KMT-2016-BLG-1836, which was found by the Korea Microlensing Telescope Network (KMTNet) high-cadence observations (${\rm{\Gamma }}\sim 4\,{\mathrm{hr}}^{-1}$).The planet–host mass ratio q ~ 0.004.A Bayesian analysis indicates that the planetary system is composed of a super-Jovian ${M}_{\mathrm{planet}}={2.2}_{-1.1}^{+1.9}{M}_{{\rm{J}}}$ planet orbiting an M or K dwarf, ${M}_{\mathrm{host}}={0.49}_{-0.25}^{+0.38}{M}_{\odot }$, at a distance of ${D}_{{\rm{L}}}={7.1}_{-2.4}^{+0.8}$ kpc.The projected planet–host separation is ${3.5}_{-0.9}^{+1.1}$ au, implying that the planet is located beyond the snow line of the host star.Future high-resolution images can potentially strongly constrain the lens brightness and thus the mass and distance of the planetary system.Without considering detailed detection efficiency, selection, or publication biases, we find a potential mass-ratio desert at −3.7 lesssim log q lesssim −3.0 for the 31 published KMTNet planets.
关键词：Gravitational;microlensing;exoplanet;detection