KMTNet 微透镜事件的系统再分析,论文 II:大源事件中的两颗新行星
地球与行星天体物理
2025-05-12 v2 星系天体物理
天体物理仪器与方法
摘要
在本工作中,我们继续将更新后的 KMTNet 精修测光(TLC)流水线应用于历史微透镜事件。我们将该流水线应用于 KMTNet 数据库中的一个子样本,即所谓的大源样本。借助改进后的测光数据,我们对该样本中的异常进行了系统搜索。搜索成功揭示了四个新的类行星异常,并复现了两个已知的行星信号。经详细分析后,两个新发现的异常被确认为明确的行星:KMT-2019-BLG-0578 与 KMT-2021-BLG-0736,其行星与宿主质量比分别为 与 。另一事件 OGLE-2018-BLG-0421(KMT-2018-BLG-0831)仍存在歧义,透镜系统中无论是恒星伴星还是巨行星均有可能解释所观测到的异常。最后一个事件 MOA-2022-BLG-038(KMT-2022-BLG-2342)的异常信号被归因于一颗额外的源星。在该样本中,我们的流程使已确认行星的数量翻了一番,显著提升了巡天灵敏度。
引用
@article{arxiv.2503.19471,
title = {Systematic Reanalysis of KMTNet Microlensing Events, Paper II: Two New Planets in Giant-Source Events},
author = {Hongjing Yang and Jennifer C. Yee and Jiyuan Zhang and Chung-Uk Lee and Dong-Jin Kim and Ian A. Bond and Andrzej Udalski and Kyu-Ha Hwang and Weicheng Zang and Qiyue Qian and Andrew Gould and Shude Mao and Michael D. Albrow and Sun-Ju Chung and Cheongho Han and Youn Kil Jung and Yoon-Hyun Ryu and In-Gu Shin and Yossi Shvartzvald and Sang-Mok Cha and Hyoun-Woo Kim and Seung-Lee Kim and Dong-Joo Lee and Yongseok Lee and Byeong-Gon Park and Richard W. Pogge and Fumio Abe and Ken Bando and David P. Bennett and Aparna Bhattacharya and Akihiko Fukui and Ryusei Hamada and Shunya Hamada and Naoto Hamasaki and Yuki Hirao and Stela Ishitani Silva and Yoshitaka Itow and Naoki Koshimoto and Yutaka Matsubara and Shota Miyazaki and Yasushi Muraki and Tutumi Nagai and Kansuke Nunota and Greg Olmschenk and Clément Ranc and Nicholas J. Rattenbury and Yuki Satoh and Takahiro Sumi and Daisuke Suzuki and Sean K. Terry and Paul . J. Tristram and Aikaterini Vandorou and Hibiki Yama and Przemek Mróz and Jan Skowron and Radoslaw Poleski and Michał K. Szymański and Igor Soszyński and Paweł Pietrukowicz and Szymon Kozłowski and Krzysztof Ulaczyk and Krzysztof A. Rybicki and Patryk Iwanek and Marcin Wrona},
journal= {arXiv preprint arXiv:2503.19471},
year = {2025}
}
备注
Author's edition. Accepted for publication in The Astronomical Journal