论文标题
OGLE-2018-BLG-0584和KMT-2018-BLG-2119：两个微透镜事件，带有两个镜头质量和两个源星
OGLE-2018-BLG-0584 and KMT-2018-BLG-2119: two microlensing events with two lens masses and two source stars
论文作者
论文摘要
我们对先前观察季节中收集的微透析数据进行系统研究，目的是重新分析异常的镜头事件，而没有建议的合理模型。我们发现，两个异常的镜头事件OGE-2018-BLG-0584和KMT-2018-BLG-2119无法用基于二进制镜头单源（2L1）或单镜头二进制二进制二进制二元 - 源（1L2S）解释的常规模型来解释。我们通过在2L1S镜头系统配置中添加额外的镜头（3L1S模型）或源（2L2S模型）组件来测试使用更复杂的模型解释光曲线的可行性。我们发现，2L2S解释很好地解释了这两个事件的光曲线，每种事件都有一对溶液是由近亲和广泛的堕落造成的。对于事件OGE-2018-BLG-0584，源是由两个K型星组成的二元，镜头是由两个M矮人组成的二进制。对于KMT-2018-BLG-2119，源是由两个矮人和k光谱类型组成的二进制，镜头是由低质量M矮人和棕色矮人组成的二元。
We conduct a systematic investigation of the microlensing data collected during the previous observation seasons for the purpose of reanalyzing anomalous lensing events with no suggested plausible models. We find that two anomalous lensing events OGLE-2018-BLG-0584 and KMT-2018-BLG-2119 cannot be explained with the usual models based on either a binary-lens single-source (2L1S) or a single-lens binary-source (1L2S) interpretation. We test the feasibility of explaining the light curves with more sophisticated models by adding an extra lens (3L1S model) or a source (2L2S model) component to the 2L1S lens-system configuration. We find that a 2L2S interpretation well explains the light curves of both events, for each of which there are a pair of solutions resulting from the close and wide degeneracy. For the event OGLE-2018-BLG-0584, the source is a binary composed of two K-type stars, and the lens is a binary composed of two M dwarfs. For KMT-2018-BLG-2119, the source is a binary composed of two dwarfs of G and K spectral types, and the lens is a binary composed of a low-mass M dwarf and a brown dwarf.
