MOA Data Reveal a New Mass, Distance, and Relative Proper Motion for Planetary System OGLE-2015-BLG-0954L-猫眼课题宝

DOI：

10.3847/1538-3881/aa7aee

发表时间：

2017-05

期刊：

The Astronomical Journal

影响因子：

通讯作者：

中科院分区：

其他

文献类型：

作者：

D. Bennett;I. Bond;F. Abe;Y. Asakura;R. Barry;A. Bhattacharya;M. Donachie;P. Evans;A. Fukui;Y. Hirao;Y. Itow;N. Koshimoto;M. Li;C. Ling;K. Masuda;Y. Matsubara;Y. Muraki;M. Nagakane;K. Ohnishi;C. Ranc;N. Rattenbury;T. Saito;A. Sharan;D. Sullivan;T. Sumi;D. Suzuki;P. Tristram;T. Yamada;T. Yamada;A. Yonehara

我们展示了MOA协作的行星微透镜事件OGLE-2015- blg -0954的光曲线数据，该数据先前在KMTNet和OGLE协作的一篇论文中宣布。MOA数据覆盖了KMTNet或光学引力透镜实验（OGLE）数据没有覆盖的焦散出口，它们为有限源效应提供了更可靠的测量。MOA数据还提供了一种新的光源颜色测量方法，揭示了透镜-光源相对固有运动μrel = 11.8±0.8 mas yr - 1，而KMTNet-OGLE论文中报道的μrel = 18.4±1.7 mas yr - 1。这个μrel的MOA值的先验概率比以前的值大了约100倍，并且不需要透镜系统距离DL < 1 kpc。根据校正后的光源颜色，我们发现透镜系统是由一颗质量较大的行星围绕一颗恒星运行，轨道间距为，距离为。

We present the MOA Collaboration light-curve data for the planetary microlensing event OGLE-2015-BLG-0954, which was previously announced in a paper by the KMTNet and OGLE Collaborations. The MOA data cover the caustic exit, which was not covered by the KMTNet or Optical Gravitational Lensing Experiment (OGLE) data, and they provide a more reliable measurement of the finite source effect. The MOA data also provide a new source color measurement that reveals a lens-source relative proper motion of μrel = 11.8 ± 0.8 mas yr−1, which compares to the value of μrel = 18.4 ± 1.7 mas yr−1 reported in the KMTNet-OGLE paper. This new MOA value for μrel has an a priori probability that is a factor of ≳100 times larger than the previous value, and it does not require a lens system distance of DL < 1 kpc. Based on the corrected source color, we find that the lens system consists of a planet of mass orbiting a star at an orbital separation of and a distance of .

MOA Data Reveal a New Mass, Distance, and Relative Proper Motion for Planetary System OGLE-2015-BLG-0954L

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