KMT-2022-BLG-1818Lb,c：一颗冷型超星际质量行星与行星兄弟
地球与行星天体物理
2025-05-13 v2 太阳与恒星天体物理
摘要
我们报告了第六个人造星系双行星系统 KMT-2022-BLG-1818Lb,c 的发现与分析，该系统通过针对高放大事件的跟踪项目被发现。两个行星都受到众所周知的“近/远”退行的制约;尽管对于第一个行星，其超星际质量比 在两种解中都相同，但“近”拓扑，其归一化分离为 ，由于 被明确偏好。然而，与所有以前的双行星人造星系不同，第二个行星的质量比 在第一个行星的“近”和“远”拓扑中相差约一个数量级。尽管这种退行在本案例中由于高频率跟踪观测而被解决，但这种新退行的出现表明，在分析未来的双行星系统时需要谨慎。贝叶斯分析表明，宿主很可能是位于银河盘面中的一颗 K 型恒星。第一个行星可能是一颗类似行星的超星际质量行星，而第二个行星则是一颗行星质量的行星，轨道可能是类似水星或类似行星的轨道。
引用
@article{arxiv.2505.05093,
title = {KMT-2022-BLG-1818Lb,c: A Cold Super-Jupiter with a Saturn Sibling},
author = {Hongyu Li and Jiyuan Zhang and Cheongho Han and Weicheng Zang and Youn Kil Jung and Andrzej Udalski and Takahiro Sumi and Hongjing Yang and Renkun Kuang and Shude Mao and Michael D. Albrow and Sun-Ju Chung and Andrew Gould and Kyu-Ha Hwang and Yoon-Hyun Ryu and In-Gu Shin and Yossi Shvartzvald and Jennifer C. Yee 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 Berto Monard and Yunyi Tang and Subo Dong and Zhuokai Liu and Grant Christie and Jennie McCormick and Tim Natusch and Qiyue Qian and Dan Maoz and Wei Zhu and Przemek Mróz and Michał K. Szymański and Jan Skowron and Radoslaw 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 Ken Bando and David P. Bennett and Aparna Bhattacharya and Ian A. Bond and Akihiko Fukui and Ryusei Hamada and Shunya Hamada and Naoto Hamasak and Yuki Hirao and Stela Ishitani Silva 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 Daisuke Suzuki and Sean Terry and Paul J. Tristram and Aikaterini Vandorou and Hibiki Yama},
journal= {arXiv preprint arXiv:2505.05093},
year = {2025}
}
备注
submitted to ApJL