微镜事件表明超地球型系外行星常见于类似木星的轨道
地球与行星天体物理
2025-04-30 v1 星系天体物理
太阳与恒星天体物理
摘要
被分类为超地球的系外行星在短周期轨道（靠近宿主星）上常见，但其在更宽轨道上的丰度尚未得到良好约束。引力微镜对系外行星在宽轨道上的探测具有敏感性。我们观察到了微镜事件 OGLE-2016-BLG-0007，该事件表明存在一颗系外行星，其星-行星质量比约为地球-太阳质量比的两倍，轨道周期为土星以上。我们将该事件与来自微镜测量 survey 的更大样本合并，用于确定宽轨道行星质量比分布。我们推断，在类似木星的轨道上，每颗恒星约有0.35颗超地球型行星。观测结果最符合双峰分布，即超地球和气体巨星分别形成两个峰。我们认为，这反映了它们形成过程的差异。
引用
@article{arxiv.2504.20158,
title = {Microlensing events indicate that super-Earth exoplanets are common in Jupiter-like orbits},
author = {Weicheng Zang and Youn Kil Jung and Jennifer C. Yee and Kyu-Ha Hwang and Hongjing Yang and Andrzej Udalski and Takahiro Sumi and Andrew Gould and Shude Mao and Michael D. Albrow and Sun-Ju Chung and Cheongho Han and Yoon-Hyun Ryu and In-Gu Shin and Yossi Shvartzvald and Sang-Mok Cha and Dong-Jin Kim and Hyoun-Woo 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 Xiangyu Zhang and Renkun Kuang and Hanyue Wang and Jiyuan Zhang and Zhecheng Hu and Wei Zhu and Przemek Mróz and Jan Skowron and Radosław 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 and Mariusz Gromadzki and Fumio Abe and Richard Barry and David P. Bennett and Aparna Bhattacharya and Ian A. Bond and Hirosane Fujii and Akihiko Fukui and Ryusei Hamada and Yuki Hirao and Stela Ishitani Silva and Yoshitaka Itow and Rintaro Kirikawa and Naoki Koshimoto and Yutaka Matsubara and Shota Miyazaki and Yasushi Muraki and Greg Olmschenk and Clément Ranc and Nicholas J. Rattenbury and Yuki Satoh and Daisuke Suzuki and Mio Tomoyoshi and Paul J. Tristram and Aikaterini Vandorou and Hibiki Yama and Kansuke Yamashita},
journal= {arXiv preprint arXiv:2504.20158},
year = {2025}
}
备注
Published in Science