Four Giant Planets from 2024 KMTNet Microlensing Campaign
Authors
Cheongho Han
Andrzej Udalski
Ian A. Bond
Chung-Uk Lee
Jiyuan Zhang
Michael D. Albrow
Sun-Ju Chung
Andrew Gould
Youn Kil Jung
Kyu-Ha Hwang
Yoon-Hyun Ryu
Yossi Shvartzvald
In-Gu Shin
Jennifer C. Yee
Weicheng Zang
Hongjing Yang
Doeon Kim
Dong-Jin Kim
Byeong-Gon Park
Przemek Mróz
Michał K. Szymański
Jan Skowron
Radosław Poleski
Igor Soszyński
Paweł Pietrukowicz
Szymon Kozłowski
Krzysztof A. Rybicki
Patryk Iwanek
Krzysztof Ulaczyk
Marcin Wrona
Mariusz Gromadzki
Mateusz J. Mróz
Fumio Abe
David P. Bennett
Aparna Bhattacharya
Ryusei Hamada
Stela Ishitani Silva
Yuki Hirao
Asahi Idei
Shota Miyazaki
Yasushi Muraki
Tutumi Nagai
Kansuke Nunota
Greg Olmschenk
Clément Ranc
Nicholas J. Rattenbury
Yuki Satoh
Takahiro Sumi
Daisuke Suzuki
Takuto Tamaoki
Sean K. Terry
Paul J. Tristram
Aikaterini Vandorou
Hibiki Yama
Yuchen Tang
Yunyi Tang
Shude Mao
Dan Maoz
Wei Zhu
Abstract
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 $(1.5\text{--}17.9)\times 10^{-3}$. 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.
