OGLE-2018-BLG-1185b：一颗绕低质量矮星运行的低质量微透镜行星
地球与行星天体物理
2021-08-11 v2
摘要
我们报道了对行星微透镜事件OGLE-2018-BLG-1185的分析，该事件被大量地基望远镜及空间望远镜观测到。地基光变曲线表明行星-宿主恒星质量比很低，为，接近宽轨道系外行星质量比分布的峰值。我们在假设所有质量恒星拥有相等概率宿主该行星的前提下，利用测得角爱因斯坦半径通过贝叶斯分析估计宿主恒星与行星质量。观测到的流量变化很小，但仍对微透镜视差给出了约束。施加该流量变化应小于仪器流量单位的保守约束，表明宿主质量为、行星质量为。包含完整视差约束的贝叶斯分析给出更小的宿主恒星与行星质量，分别为和。未来用或ELT进行的高分辨率成像观测可区分这两种情形，并有助于更详细地揭示该行星系统性质。
引用
@article{arxiv.2104.02157,
title = {OGLE-2018-BLG-1185b : A Low-Mass Microlensing Planet Orbiting a Low-Mass Dwarf},
author = {Iona Kondo and Jennifer C. Yee and David P. Bennett and Takahiro Sumi and Naoki Koshimoto and Ian A. Bond and Andrew Gould and Andrzej Udalski and Yossi Shvartzvald and Youn Kil Jung and Weicheng Zang and Valerio Bozza and Etienne Bachelet and Markus P. G. Hundertmark and Nicholas J. Rattenbury and F. Abe and R. Barry and A. Bhattacharya and M. Donachie and A. Fukui and H. Fujii and Y. Hirao and S. Ishitani Silva and Y. Itow and R. Kirikawa and M. C. A. Li and Y. Matsubara and S. Miyazaki and Y. Muraki and G. Olmschenk and C. Ranc and Y. Satoh and H. Shoji and D. Suzuki and Y. Tanaka and P. J. Tristram and T. Yamawaki 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 K. Ulaczyk and K. A. Rybicki and P. Iwanek and M. Wrona and M. D. Albrow and S. -J. Chung and C. Han and K. -H. Hwang and H. -W. Kim and I. -G. Shin and S. -M. Cha and D. -J. Kim and S. -L. Kim and C. -U. Lee and D. -J. Lee and Y. Lee and B. -G. Park and R. W. Pogge and Y. -H. Ryu and C. A. Beichman and G. Bryden and S. Calchi Novati and S. Carey and B. S. Gaudi and C. B. Henderson and W. Zhu and D. Maoz and M. T. Penny and M. Dominik and U. G. Jørgensen and P. Longa-Pe{\~{ n}}a and N. Peixinho and S. Sajadian and J. Skottfelt and C. Snodgrass and J. Tregloan-Reed and M. J. Burgdorf and J. Campbell-White and S. Dib and Y. I. Fujii and T. C. Hinse and E. Khalouei and S. Rahvar and M. Rabus and J. Southworth and Y. Tsapras and R. A. Street and D. M. Bramich and A. Cassan and K. Horne and J. Wambsganss and S. Mao and A. Saha},
journal= {arXiv preprint arXiv:2104.02157},
year = {2021}
}
备注
30 pages, 11 figures, 5 tables, Accepted for publication in Astronomical Journal (AJ)