KMT-2019-BLG-1715：具有三个透镜质量与两个源星的行级微透镜事件
地球与行星天体物理
2021-06-02 v1 星系天体物理
太阳与恒星天体物理
摘要
我们研究了引力微透镜事件 KMT-2019-BLG-1715，其光变曲线在穿越焦散的双透镜光变曲线上显示出两次短期异常：一次偏离较大，另一次偏离较小。我们确定了五对解，其中异常通过在与基础双透镜模型之外添加一个额外的透镜或源分量来解释。我们通过一种方法消解简并：将第一与第二源星之间测得的流量比与由源半径之比推导出的流量比进行比较。应用该方法后仅留下一对可行解，在两者中主要异常均由透镜的行星质量第三体产生，而次要异常由一个暗弱的第二源星产生。贝叶斯分析表明该透镜由三个质量组成：一个约 的行星质量天体以及位于银河系盘中的 K 与 M 型矮星双星。我们指出透镜即为混叠体的可能性，并可通过开展高分辨率后续成像以分辨透镜与源星来验证。
引用
@article{arxiv.2104.00293,
title = {KMT-2019-BLG-1715: planetary microlensing event with three lens masses and two source stars},
author = {Cheongho Han and Andrzej Udalski and Doeone Kim and Youn Kil Jung and Chung-Uk Lee and Ian A. Bond and Michael D. Albrow and Sun-Ju Chung and Andrew Gould and Kyu-Ha Hwang and Hyoun-Woo Kim and Yoon-Hyun Ryu and In-Gu Shin and Yossi Shvartzvald and Weicheng Zang and Jennifer C. Yee and Sang-Mok Cha and Dong-Jin Kim and Seung-Lee Kim and Dong-Joo Lee and Yongseok Lee and Byeong-Gon Park and Richard W. Pogge and Chun-Hwey Kim and Woong-Tae Kim and Przemek Mróz and Michał K. Szymański and Jan Skowron and Radek Poleski and Igor Soszyński and Paweł Pietrukowicz and Szymon Kozłowski and Krzysztof Ulaczyk and Krzysztof A. Rybicki and Patryk Iwanek and Marcin Wrona and Mariusz Gromadzki and Fumio Abe and Richard Barry and David P. Bennett and Aparna Bhattacharya and Martin Donachie and Hirosane Fujii and Akihiko Fukui and Yoshitaka Itow and Yuki Hirao and Rintaro Kirikawa and Iona Kondo and Man Cheung Alex Li and Yutaka Matsubara and Yasushi Muraki and Shota Miyazaki and Clément Ranc and Nicholas J. Rattenbury and Yuki Satoh and Hikaru Shoji and Haruno Suematsu and Takahiro Sumi and Daisuke Suzuki and Yuzuru Tanaka and Paul J. Tristram and Takeharu Yamakawa and Tsubasa Yamawaki and Atsunori Yonehara},
journal= {arXiv preprint arXiv:2104.00293},
year = {2021}
}
备注
11 pages, 13 figures, 7 tables