文章基本信息

标题：Could There Be an Undetected Inner Planet Near the Stability Limit in Kepler-1647?
本地全文：下载
作者：Ziqian Hong ; Billy Quarles ; Gongjie Li 等
期刊名称：The Astronomical journal
印刷版ISSN：0004-6256
电子版ISSN：1538-3881
出版年度：2019
卷号：158
期号：1
页码：1-8
DOI：10.3847/1538-3881/ab2127
语种：English
出版社：American Institute of Physics
摘要：Kepler-1647b is the most recently discovered planet that transits two stars, i.e., a circumbinary planet (CBP). Due to its large orbital separation, Kepler-1647b stands out from the rest of the Kepler CBPs, which mostly reside on much tighter orbits near the stability limit. The large separation of Kepler-1647b challenges inward disk migration as a dominant formation pathway, suggested by the other Kepler CBPs. In this paper, we consider the possibility of an undetected planet near the stability limit by examining observational consequences of such a planet. We calculate the transit probability of the putative planet, transit timing variations (TTVs) of the known planet, and eclipsing timing variations of the host binary caused by the putative planet. We find the presence of a 30 M ⊕ inner planet to be highly unlikely near the stability limit. In addition, we provide future TTV observation windows, which will further constrain possible undetected planets with lower masses.
关键词：binaries: eclipsing;celestial mechanics;planets and satellites: dynamical evolution and stability;stars: individual (Kepler-1647)