MOA-2016-BLG-227Lb：结合光变曲线分析与 Keck 自适应光学成像进行表征的大质量行星
地球与行星天体物理
2017-06-28 v2
摘要
我们报告发现了一颗微透镜行星——MOA-2016-BLG-227Lb——其行星与宿主的质量比很大，为 。该事件位于 Campaign 9 视场附近，该视场由大量望远镜观测。因此，该事件处于多台望远镜的微透镜巡天区域内，这使得能够对行星的光变曲线信号进行良好覆盖。Keck 望远镜的高角分辨率自适应光学图像显示，在光源位置处存在超出光变曲线模型所示光源恒星通量的过剩通量。该过剩通量可能来自透镜恒星，但也可能来自光源或透镜恒星的伴星，甚至可能来自一颗无关恒星。我们在标准银河系模型的背景下，通过贝叶斯分析考虑了所有这些可能性。我们的分析表明，除非太阳型恒星比低质量恒星更有可能拥有具有此质量比的行星，否则大部分过剩通量不太可能来自透镜。我们建议，当后续高角分辨率观测不足以测量透镜与光源的相对自行时，其他具有此类观测的事件可采用与本文类似的方法。
引用
@article{arxiv.1704.01724,
title = {MOA-2016-BLG-227Lb: A Massive Planet Characterized by Combining Lightcurve Analysis and Keck AO Imaging},
author = {Naoki Koshimoto and Yossi Shvartzvald and David Bennett and Matthew Penny and Markus Hundertmark and Ian A. Bond and Weicheng Zang and Calen Henderson and Daisuke Suzuki and Nicholas J. Rattenbury and Takahiro Sumi and Fumio Abe and Yuichiro Asakura and Aparna Bhattacharya and Akihiko Fukui and Yuki Hirao and Yoshitaka Itow and M. C. A. Li and C. Ling and Kimiaki Masuda and Y. Matsubara and Taro Matsuo and Yasushi Muraki and Masayuki Nagakane and Kouji Ohnishi and C. Ranc and To. Saito and A. Sharan and Hiroshi Shibai and Denis Sullivan and P. Tristram and A. Yonehara and Christopher Gelino and Charles Beichman and Jean-Philippe Beaulieu and J. -B. Marquette and Virginie Batista and M. Friedmann and N. Hallakoun and Shai Kaspi and Dani Maoz and G. Bryden and Sebastiano Calchi Novati and Steve Howell and T. Wang and Shude Mao and Pascal Fouque and Heidi Korhonen and Uffe Jorgensen and Rachel Street and Yiannis Tsapras and Martin Dominik and Eamonn Kerins and Arnaud Cassan and Colin Snodgrass and Etienne Bachelet and Valerio Bozza and D. M. Bramich},
journal= {arXiv preprint arXiv:1704.01724},
year = {2017}
}
备注
35 pages, 7 figures, 6 tables, Accepted for publication in AJ