高采样率微引力透镜巡天探测到的四颗亚木星质量行星
地球与行星天体物理
2022-08-17 v1 星系天体物理
摘要
为了寻找短时标行星信号，我们研究了高采样率微引力透镜巡天所收集的数据。通过这一研究，我们发现了四个具有低行星-宿主质量比的行星系统，包括OGLE-2017-BLG-1691L、KMT-2021-BLG-0320L、KMT-2021-BLG-1303L和KMT-2021-BLG-1554L。尽管持续时间很短，从几小时到几天不等，这些行星信号仍被透镜巡天的联合数据清晰探测到。研究发现其中三个行星系统的质量比约为量级，另一个的质量比略大于。估计的质量表明所有被发现的行星均具有亚木星质量。KMT-2021-BLG-0320Lb、KMT-2021-BLG-1303Lb和KMT-2021-BLG-1554Lb的行星质量分别对应于木星质量的约、和倍，而OGLE-2017-BLG-1691Lb的质量对应于天王星的质量。估计的行星宿主KMT-2021-BLG-1554L的质量，，对应于恒星与棕矮星之间的边界。除该系统外，其他行星系统的宿主恒星均为低质量恒星，质量在--范围内。这些行星的发现很好地展示了当前高采样率微引力透镜巡天在探测低质量行星方面的能力。
引用
@article{arxiv.2205.10510,
title = {Four sub-Jovian-mass planets detected by high-cadence microlensing surveys},
author = {Cheongho Han and Doeon Kim and Andrew Gould and Andrzej Udalski and Ian A. Bond and Valerio Bozza and Youn Kil Jung and Michael D. Albrow and Sun-Ju Chung and Kyu-Ha Hwang and Yoon-Hyun Ryu and In-Gu Shin and Yossi Shvartzvald and Jennifer C. Yee and Weicheng Zang 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 Przemek Mróz and Michał K. Szymański and Jan Skowron and Radosław Poleski and Igor Soszyński and Paweł Pietrukowicz and Szymon Kozłowski and Krzysztof Ulaczyk and Krzysztof A. Rybicki and Patryk Iwanek and Fumio Abe and Richard K. Barry and David P. Bennett and Aparna Bhattacharya and Hirosane Fujii and Akihiko Fukui and Yuki Hirao and Yoshitaka Itow and Rintaro Kirikawa and Naoki Koshimoto and Iona Kondo and Yutaka Matsubara and Sho Matsumoto and Shota Miyazaki and Yasushi Muraki and Greg Olmschenk and Arisa Okamura and Clément Ranc and Nicholas J. Rattenbury and Yuki Satoh and Stela Ishitani Silva and Takahiro Sumi and Daisuke Suzuki and Taiga Toda and Paul J. Tristram and Aikaterini Vandorou and Hibiki Yama},
journal= {arXiv preprint arXiv:2205.10510},
year = {2022}
}
备注
12 pages, 12 figures, 9 tables