In this work, we present analyses of four newly discovered planetary microlensing events from the 2024 KMTNet survey season: KMT-2024-BLG-0176, KMT-2024-BLG-0349, KMT-2024-BLG-1870, and KMT-2024-BLG-2087. In each case, the planetary nature was revealed through distinct types of anomalies in the lensing light curves: a positive bump near the peak for KMT-2024-BLG-0176, an asymmetric peak for KMT-2024-BLG-0349, a short-duration central dip for KMT-2024-BLG-1870, and a caustic-crossing feature for KMT-2024-BLG-2087. Detailed modeling of the light curves confirms that these anomalies are produced by planetary companions with planet-to-host mass ratios in the range of (1.5–17.9)×10−3. Despite the diversity of signal morphologies, all planets detected in these events are giant planets with masses comparable to or exceeding that of Jupiter in the Solar System. Each planet orbits a host star less massive than the Sun, emphasizing the strength of microlensing in uncovering planetary systems around low-mass stellar hosts.
@article{arxiv.2512.09325,
title = {Four Giant Planets from 2024 KMTNet Microlensing Campaign},
author = {Cheongho Han and Andrzej Udalski and Ian A. Bond and Chung-Uk Lee and Jiyuan Zhang and Michael D. Albrow and Sun-Ju Chung and Andrew Gould and Youn Kil Jung and Kyu-Ha Hwang and Yoon-Hyun Ryu and Yossi Shvartzvald and In-Gu Shin and Jennifer C. Yee and Weicheng Zang and Hongjing Yang and Doeon Kim and Dong-Jin Kim and Byeong-Gon Park and Przemek Mróz and Michał K. Szymański and Jan Skowron and Radosław Poleski and Igor Soszyński and Paweł Pietrukowicz and Szymon Kozłowski and Krzysztof A. Rybicki and Patryk Iwanek and Krzysztof Ulaczyk and Marcin Wrona and Mariusz Gromadzki and Mateusz J. Mróz and Fumio Abe and David P. Bennett and Aparna Bhattacharya and Ryusei Hamada and Stela Ishitani Silva and Yuki Hirao and Asahi Idei 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 Takuto Tamaoki and Sean K. Terry and Paul J. Tristram and Aikaterini Vandorou and Hibiki Yama and Yuchen Tang and Yunyi Tang and Shude Mao and Dan Maoz and Wei Zhu},
journal= {arXiv preprint arXiv:2512.09325},
year = {2025}
}