OGLE-2017-BLG-1130:首个仅由 Spitzer 探测到的双星引力微透镜
地球与行星天体物理
2018-06-13 v2 太阳与恒星天体物理
摘要
我们分析双星引力微透镜事件 OGLE-2017-BLG-1130(质量比 q~0.45),这是首个已发表的双星异常仅由 Spitzer 空间望远镜探测到的案例。该事件提供了有力证据,表明某些双星信号可被地面单独观测遗漏而由 Spitzer 探测到。因此我们反转常规流程,首先通过拟合天基数据确定透镜参数,再利用地基观测测量微透镜视差。我们还表明,单透镜情形下常规的四重天基简并,在双星透镜事件中可变为弱八重简并。尽管该简并在事件 OGLE-2017-BLG-1130 中得到消解,但在其他事件中可能持续存在。
引用
@article{arxiv.1802.09023,
title = {OGLE-2017-BLG-1130: The First Binary Gravitational Microlens Detected From Spitzer Only},
author = {Tianshu Wang and S. Calchi Novati and A. Udalski and A. Gould and Shude Mao and W. Zang and C. Beichman and G. Bryden and S. Carey and B. S. Gaudi and C. B. Henderson and Y. Shvartzvald and J. C. Yee and P. Mroz and R. Poleski and J. Skowron and M. K. Szymanski and I. Soszynski and S. Kozlowski and P. Pietrukowicz and K. Ulaczyk and M. Pawlak and M. D. Albrow and S. -J. Chung and C. Han and K. -H. Hwang and Y. K. Jung and Y. -H. Ryu and I. -G. Shin and W. Zhu and S. -M. Cha and D. -J. Kim and H. -W. Kim and S. -L. Kim and C. -U. Lee and D. -J. Lee and Y. Lee and B. -G. Park and R. W. Pogge},
journal= {arXiv preprint arXiv:1802.09023},
year = {2018}
}
备注
14 pages, 5 figures