The lowest mass ratio planetary microlens: OGLE 2016?BLG?1195Lb
The lowest mass ratio planetary microlens: OGLE 2016?BLG?1195Lb
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质量比最低的行星微透镜：OGLE 2016?BLG?1195Lb
DOI：
10.1093/mnras/stx1049
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发表时间：
2017
影响因子：
4.8
通讯作者：
et al.
中科院分区：
文献类型：
--
作者：
Bond I. A.;et al.
我们报告了通过微透镜方法在事件OGLE 2016-BLG-1195的光曲线中发现的质量比最低的系外行星。通过对测量数据的检查，这颗行星显示出自己与微透镜单透镜轮廓的微小偏差。行星信号的持续时间为∼2.5kpc h。测量到的行星质量与其主星的比率为q=44.2±0.7kpc×10kpc 5。我们进一步估计，该透镜系统可能包括一颗冷的∼3地球质量行星，它位于一颗质量为0.2太阳质量的恒星的宽轨道上，总距离为7.1kpc。
We report discovery of the lowest mass ratio exoplanet to be found by the microlensing method in the light curve of the event OGLE 2016–BLG–1195. This planet revealed itself as a small deviation from a microlensing single lens profile from an examination of the survey data. The duration of the planetary signal is ∼2.5 h. The measured ratio of the planet mass to its host star isq= 4.2 ± 0.7 × 10−5. We further estimate that the lens system is likely to comprise a cold ∼3 Earth mass planet in an ∼2 au wide orbit around a 0.2 Solar mass star at an overall distance of 7.1 kpc.