OGLE-2016-BLG-0263L\lowercase{b}: 通过重复事件通道探测极低质量双星伴星
地球与行星天体物理
2017-09-13 v1
摘要
我们报告了发现一颗行星质量的伴星环绕微引力透镜 OGLE-2016-BLG-0263L。大多数低质量伴星是通过对主星产生的平滑且对称的光变曲线的扰动而被探测到的，与此不同，该伴星是通过重复事件通道被发现的，即在主星产生的事件结束后，伴星自身产生了其自身的单质量光变曲线。得益于高频次巡天对第二个峰值的连续覆盖，排除了由于源星双星性导致重复事件性质的可能性，置信水平为 。通过贝叶斯分析估计的伴星质量为 。投影的主星-伴星间距为 au。间距与雪线距离的比值 ，对应于太阳系最外层行星海王星之外的区域。我们讨论了高频次巡天在扩展低质量伴星微引力透镜探测范围以及未来空间微引力透镜巡天中的重要性。
引用
@article{arxiv.1708.02727,
title = {OGLE-2016-BLG-0263L\lowercase{b}: Microlensing Detection of a Very Low-mass Binary Companion Through a Repeating Event Channel},
author = {C. Han and A. Udalski and A. Gould and I. A. Bond and M. D. Albrow and S. -J. Chung and Y. K. Jung and Y. -H. Ryu and I. -G. Shin and J. C. Yee and W. Zhu and S. -M. Cha and S. -L. Kim and D. -J. Kim and C. -U. Lee and Y. Lee and B. -G. Park and J. Skowron and P. Mróz and P. Pietrukowicz and S. Kozłowski and R. Poleski and M. K. Szymański and I. Soszyński and K. Ulaczyk and M. Pawlak and F. Abe and Y. Asakura and R. Barry and D. P. Bennett and A. Bhattacharya and M. Donachie and P. Evans and A. Fukui and Y. Hirao and Y. Itow and N. Koshimoto and M. C. A. Li and C. H. Ling and K. Masuda and Y. Matsubara and Y. Muraki and M. Nagakane and K. Ohnishi and C. Ranc and N. J. Rattenbury and To. Saito and A. Sharan and D. J. Sullivan and T. Sumi and D. Suzuki and P. J. Tristram and T. Yamada and T. Yamada and A. Yonehara},
journal= {arXiv preprint arXiv:1708.02727},
year = {2017}
}
备注
10 pages, 8 figures