OGLE-2019-BLG-0825：源系统约束及五天数 Xallarap 效应在候选行星微透镜事件中对双星透镜参数的影响
地球与行星天体物理
2023-07-27 v1 星系天体物理
太阳与恒星天体物理
摘要
我们给出对微透镜事件 OGLE-2019-BLG-0825 的分析。该事件经初步建模被识别为行星候选体。我们发现最佳拟合静态双星透镜模型存在显著残差，而 xallarap 效应可非常好地拟合残差并显著改善 值。另一方面，通过在模型中纳入 xallarap 效应，我们发现诸如质量比 与间距 等双星透镜参数无法被很好约束。然而，我们也发现源系统参数（如轨道周期与半长轴）在我们分析的所有模型间均一致。因此我们约束源系统属性的能力优于约束透镜系统属性。源系统由一颗 G 型主序星及一颗绕其运行、周期 天的棕矮星组成。该分析首次证明 xallarap 效应确实会影响行星事件中的双星透镜参数。对于源系统轨道周期较长或具有 caustic 穿越的事件，xallarap 效应的有无影响透镜参数并不常见，但在其他情形（如本事件）中，xallarap 效应可影响双星透镜参数。
引用
@article{arxiv.2307.14274,
title = {OGLE-2019-BLG-0825: Constraints on the Source System and Effect on Binary-lens Parameters arising from a Five Day Xallarap Effect in a Candidate Planetary Microlensing Event},
author = {Yuki K. Satoh and Naoki Koshimoto and David P. Bennett and Takahiro Sumi and Nicholas J. Rattenbury and Daisuke Suzuki and Shota Miyazaki and Ian A. Bond and Andrzej Udalski and Andrew Gould and Valerio Bozza and Martin Dominik and Yuki Hirao and Iona Kondo and Rintaro Kirikawa and Ryusei Hamada and Fumio Abe and Richard Barry and Aparna Bhattacharya and Hirosane Fujii and Akihiko Fukui and Katsuki Fujita and Tomoya Ikeno and Stela Ishitani Silva and Yoshitaka Itow and Yutaka Matsubara and Sho Matsumoto and Yasushi Muraki and Kosuke Niwa and Arisa Okamura and Greg Olmschenk and Clément Ranc and Taiga Toda and Mio Tomoyoshi and Paul J. Tristram and Aikaterini Vandorou and Hibiki Yama and Kansuke Yamashita and Przemek Mróz and Radosław Poleski and Jan Skowron and Michał K. Szymański 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 Michael D. Albrow and Sun-Ju Chung and Cheongho Han and Kyu-Ha Hwang and Doeon Kim and Youn Kil Jung and Hyoun Woo Kim and Yoon-Hyun Ryu and In-Gu Shin and Yossi Shvartzvald and Hongjing Yang and Jennifer C. Yee and Weicheng Zang and Sang-Mok Cha and Dong-Jin Kim and Seung-Lee Kim and Chung-Uk Lee and Dong-Joo Lee and Yongseok Lee and Byeong-Gon Park and Richard W. Pogge and Uffe G. Jørgensen and Penélope Longa-Peña and Sedighe Sajadian and Jesper Skottfelt and Colin Snodgrass and Jeremy Tregloan-Reed and Nanna Bach-Møller and Martin Burgdorf and Giuseppe D'Ago and Lauri Haikala and James Hitchcock and Markus Hundertmark and Elahe Khalouei and Nuno Peixinho and Sohrab Rahvar and John Southworth and Petros Spyratos},
journal= {arXiv preprint arXiv:2307.14274},
year = {2023}
}
备注
19 pages, 7 figures, 6 tables. Accepted by AJ