论文标题
OGLE-2018-BLG-0677LB：银河凸起附近的超级大地
Ogle-2018-blg-0677lb: A super earth near the galactic bulge
论文作者
论文摘要
我们报告了微透镜事件OGE-2018-BLG-0677的分析。事件的光曲线中的一个小功能导致发现镜头是星形行动系统。尽管有两种变性的溶液在此事件中无法区分，但两者都导致了类似的行星宿主质量比。我们基于银河模型进行贝叶斯分析，以获取系统的属性，并发现该行星对应于质量$ $ M _ {\ Mathrm {Planet}} = {3.96} = {3.96}^{+5.88}^{+5.88} _ { - 2.66} _ { - 2.66} _ { - 2.66} \ mathrm____} $ culm_____ {m {mmathrm__ cop.主机星有一个质量$ m _ {\ mathrm {host}} = {0.12}^{+0.14} _ { - 0.08} \ Mathrm {m_ \ odot} $。内部和外部解决方案的投影分离为$ {0.63}^{+0.20} _ { - 0.17} $ 〜Au和$ {0.72}^{+0.23} _ { - 0.19} $ 〜Au。在$Δχ^2 =χ^2（{\ rm 1l1s}）） - χ^2（{{\ rm 2l1s}）= 46 $，这是迄今为止最低的$Δχ^2 $，对于迄今为止，任何可靠地检测的微透镜星球的最低$Δχ^2 $都非常相关，该功能与事实相关的事实是一个'dip a'dip a'dip'的事实。
We report the analysis of the microlensing event OGLE-2018-BLG-0677. A small feature in the light curve of the event leads to the discovery that the lens is a star-planet system. Although there are two degenerate solutions that could not be distinguished for this event, both lead to a similar planet-host mass ratio. We perform a Bayesian analysis based on a Galactic model to obtain the properties of the system and find that the planet corresponds to a super-Earth/sub-Neptune with a mass $M_{\mathrm{planet}} = {3.96}^{+5.88}_{-2.66}\mathrm{M_\oplus}$. The host star has a mass $ M_{\mathrm{host}} = {0.12}^{+0.14}_{-0.08}\mathrm{M_\odot}$. The projected separation for the inner and outer solutions are ${0.63}^{+0.20}_{-0.17}$~AU and ${0.72}^{+0.23}_{-0.19}$~AU respectively. At $Δχ^2=χ^2({\rm 1L1S})-χ^2({\rm 2L1S})=46$, this is by far the lowest $Δχ^2$ for any securely-detected microlensing planet to date, a feature that is closely connected to the fact that it is detected primarily via a "dip" rather than a "bump".
