MOA-2020-BLG-208Lb：位于预测沙漠中的冷亚土星行星
地球与行星天体物理
2023-05-24 v2 星系天体物理
摘要
我们分析 MOA-2020-BLG-208 引力微透镜事件，并给出新行星 MOA-2020-BLG-208Lb 的发现与表征，其估计为亚土星质量。该行星质量比 、间距 ，位于 MOA 合作组（Suzuki 等 2016）导出的质量比函数峰值附近，处于预期样本灵敏度边缘。对这些估计，我们给出使用两种质量律先验的结果：一为假设所有恒星具有相等携行星概率，另一为假设行星更可能绕质量更大恒星公转。第一种情形下，我们估计透镜系统可能为质量 、宿主星质量 、距离 的行星。第二种情形下，我们估计 、、。作为冷亚土星质量行星，该行星增添了支持修正行星形成模型的日益增多的证据，并有资格纳入扩展 MOA-II 系外行星微透镜样本。
引用
@article{arxiv.2210.02436,
title = {MOA-2020-BLG-208Lb: Cool Sub-Saturn Planet Within Predicted Desert},
author = {Greg Olmschenk and David P. Bennett and Ian A. Bond and Weicheng Zang and Youn Kil Jung and Jennifer C. Yee and Etienne Bachelet and Fumio Abe and Richard K. Barry and Aparna Bhattacharya and Hirosane Fujii and Akihiko Fukui and Yuki Hirao and Stela Ishitani Silva and Yoshitaka Itow and Rintaro Kirikawa and Iona Kondo and Naoki Koshimoto and Yutaka Matsubara and Sho Matsumoto and Shota Miyazaki and Brandon Munford and Yasushi Muraki and Arisa Okamura and Clément Ranc and Nicholas J. Rattenbury and Yuki Satoh and Takahiro Sumi and Daisuke Suzuki and Taiga Toda and Paul J. Tristram and Katie Vandorou and Hibiki Yama and Michael D. Albrow and Sang-Mok Cha and Sun-Ju Chung and Andrew Gould and Cheongho Han and Kyu-Ha Hwang 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 Yoon-Hyun Ryu and In-Gu Shin and Yossi Shvartzvald and Grant Christie and Tony Cooper and John Drummond and Jonathan Green and Steve Hennerley and Jennie McCormick and L. A. G. Monard and Tim Natusch and Ian Porritt and Thiam-Guan Tan and Shude Mao and Dan Maoz and Matthew T. Penny and Wei Zhu and V. Bozza and Arnaud Cassan and Martin Dominik and Markus Hundertmark and R. Figuera Jaimes and K. Kruszyńska and K. A. Rybicki and R. A. Street and Y. Tsapras and Joachim Wambsganss and Ł. Wyrzykowski and P. Zieliński and Gioia Rau},
journal= {arXiv preprint arXiv:2210.02436},
year = {2023}
}