KMT-2019-BLG-1715: planetary microlensing event with three lens masses and two source stars
Abstract
We investigate the gravitational microlensing event KMT-2019-BLG-1715, of which light curve shows two short-term anomalies from a caustic-crossing binary-lensing light curve: one with a large deviation and the other with a small deviation. We identify five pairs of solutions, in which the anomalies are explained by adding an extra lens or source component in addition to the base binary-lens model. We resolve the degeneracies by applying a method, in which the measured flux ratio between the first and second source stars is compared with the flux ratio deduced from the ratio of the source radii. Applying this method leaves a single pair of viable solutions, in both of which the major anomaly is generated by a planetary-mass third body of the lens, and the minor anomaly is generated by a faint second source. A Bayesian analysis indicates that the lens comprises three masses: a planet-mass object with and binary stars of K and M dwarfs lying in the galactic disk. We point out the possibility that the lens is the blend, and this can be verified by conducting high-resolution followup imaging for the resolution of the lens from the source.
Keywords
Cite
@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}
}
Comments
11 pages, 13 figures, 7 tables