Spitzer微透镜视差揭示OGLE-2016-BLG-1067：盘星族中M矮星旁一颗亚木星质量行星
地球与行星天体物理
2019-02-27 v1
摘要
我们报告发现一颗亚木星质量行星，其绕行于一颗M矮星雪线之外，该M矮星极可能位于银河系盘内；此发现属于针对银心方向微透镜行星反常的Spitzer与地面联合监测项目。微透镜参数被光变曲线建模强烈约束，尤其是基于Spitzer的微透镜视差 测量。然而，与许多行星微透镜事件不同，此处无焦散穿越，因此角爱因斯坦半径 仅基于光变曲线建模有上限。此外，分析使我们识别出8种简并构型：四重微透镜视差简并因地面解中存在的焦散结构简并而加倍。为确定物理参数并同时打破视差简并，我们运用一系列论证： 层级、Rich论证以及先验银河系模型。偏好构型为寄主星位于 ，质量 ，旁有一颗土星类行星，质量 ，投影间距 ，约为系统雪线的2.1倍之外。因此，它加入了由微透镜发现的、绕M矮星雪线附近或之外运行的亚木星行星不断增长的族群。基于用Spitzer跟进观测事件选取的实时协议规则，该行星将不进入测量银河系行星分布的样本。
引用
@article{arxiv.1801.05806,
title = {Spitzer Microlensing Parallax for OGLE-2016-BLG-1067: a sub-Jupiter Orbiting an M-dwarf in the Disk},
author = {S. Calchi Novati and D. Suzuki and A. Udalski and A. Gould and Y. Shvartzvald and V. Bozza and D. P. Bennett and C. Beichman and G. Bryden and S. Carey and B. S. Gaudi and C. B. Henderson and J. C. Yee and W. Zhu and F. Abe and Y. Asakura and R. Barry and A. Bhattacharya and I. A. Bond and M. Donachie and P. Evans and A. Fukui and Y. Hirao and Y. Itow and K. Kawasaki and N. Koshimoto and M. C. A. Li and C. H. Ling and Y. Matsubara and S. Miyazaki 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 P. J. Tristram and T. Yamada and A. Yonehara and P. Mróz and R. Poleski and J. Skowron and M. K. Szymański and I. Soszyński and S. Kozłowski and P. Pietrukowicz and K. Ulaczyk and M. Pawlak and M. D. Albrow and S. -J. Chung and C. Han and K. -H. Hwang and Y. K. Jung and Y. -H. Ryu and I. -G. Shin and W. Zang and S. -M. Cha and D. -J. Kim and H. -W. Kim and S. -L. Kim and C. -U. Lee and D. -J. Lee and Y. Lee and B. -G. Park and R. W. Pogge},
journal= {arXiv preprint arXiv:1801.05806},
year = {2019}
}
备注
Submitted to AAS Journals