MOA-2016-BLG-231L 的斯皮策微透镜观测：银河系盘中一对逆向旋转的棕矮星双星
太阳与恒星天体物理
2019-02-13 v2
摘要
我们分析了双星微透镜事件 MOA-2016-BLG-231，该事件由地面和 Spitzer 联合观测。透镜由极低质量棕矮星（BD）组成，其质量为 和 ，位于银河系盘内 处。这是微透镜发现的第五个双星棕矮星系统，且该 BD 双星的运动方向与盘星轨道运动相反。对透镜物理性质的约束来自 Spitzer 光变曲线晚期的非焦散穿越特征。因此，MOA-2016-BLG-231 展示了 Spitzer 在分辨短时标（ 天）双星 BD 事件中 BD 性质方面的关键作用。
引用
@article{arxiv.1902.03150,
title = {Spitzer Microlensing of MOA-2016-BLG-231L : A Counter-Rotating Brown Dwarf Binary in the Galactic Disk},
author = {Sun-Ju Chung and Andrew Gould and Jan Skowron and Ian A. Bond and Wei Zhu and Michael D. Albrow and Youn Kil Jung and Cheongho Han 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 Hyoun-Woo Kim and Seung-Lee Kim and Yun-Hak Kim and Chung-Uk Lee and Dong-Joo Lee and Yongseok Lee and Byeong-Gon Park and Richard W. Pogge and Andrzej Udalski and Radek Poleski and Przemek Mróz and Paweł Pietrukowicz and Michał K. Szymański and Igor Soszyński and Szymon Kozłowski and Krzysztof Ulaczyk and Michał Pawlak and Charles A. Beichman and Geoffery Bryden and Sebastiano Calchi Novati and Sean Carey and B. Scott Gaudi and Calen B. Henderson and Fumio Abe and Richard Barry and David P. Bennett and Aparna Bhattacharya and Martin Donachie and Akihiko Fukui and Yuki Hirao and Yoshitaka Itow and Kohei Kawasaki and Iona Kondo and Naoki Koshimoto and Man Cheung Alex Li and Yutaka Matsubara and Yasushi Muraki and Shota Miyazaki and Masayuki Nagakane and Clément Ranc and Nicholas J. Rattenbury and Haruno Suematsu and Denis J. Sullivan and Takahiro Sumi and Daisuke Suzuki and Paul J. Tristram and Atsunori Yonehara},
journal= {arXiv preprint arXiv:1902.03150},
year = {2019}
}
备注
18 pages, 8 figures