Kepler-47：一个凌星环双星多行星系统
太阳与恒星天体物理
2015-06-11 v1 地球与行星天体物理
摘要
我们报告了 Kepler-47 的发现，这是一个由两颗行星围绕一对食双星运行的系统。内侧和外侧行星的半径分别为地球的 3.0 倍和 4.6 倍。该双星系统由一颗类太阳恒星和一颗大小约为其三分之一的伴星组成，彼此绕转周期为 7.45 天。内侧行星的轨道周期为 49.5 天，已观测到十八次凌星现象，从而得以详细刻画其轨道及恒星的轨道。外侧行星的轨道周期为 303.2 天，虽然该行星并非类地行星，但它位于经典的“宜居带”内，即在类地行星上可能存在液态水的区域。Kepler-47 拥有两颗已知行星，这一发现确立了密近双星可以容纳完整的行星系统。
引用
@article{arxiv.1208.5489,
title = {Kepler-47: A Transiting Circumbinary Multi-Planet System},
author = {Jerome A. Orosz and William F. Welsh and Joshua A. Carter and Daniel C. Fabrycky and William D. Cochran and Michael Endl and Eric B. Ford and Nader Haghighipour and Phillip J. MacQueen and Tsevi Mazeh and Roberto Sanchis-Ojeda and Donald R. Short and Guillermo Torres and Eric Agol and Lars A. Buchhave and Laurance R. Doyle and Howard Isaacson and Jack J. Lissauer and Geoffrey W. Marcy and Avi Shporer and Gur Windmiller and Thomas Barclay and Alan P. Boss and Bruce D. Clarke and Jonathan Fortney and John C. Geary and Matthew J. Holman and Daniel Huber and Jon M. Jenkins and Karen Kinemuchi and Ethan Kruse and Darin Ragozzine and Dimitar Sasselov and Martin Still and Peter Tenenbaum and Kamal Uddin and Joshua N. Winn and David G. Koch and William J. Borucki},
journal= {arXiv preprint arXiv:1208.5489},
year = {2015}
}
备注
To appear on Science Express August 28, 11 pages, 3 figures, one table (main text), 56 pages, 28 figures, 10 tables