arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1201.5409astro-ph.EP
收藏

来自开普勒的Transit定时观测:II。用非参数相关分析确认两个多行星系统

Transit Timing Observations from Kepler: II. Confirmation of Two Multiplanet Systems via a Non-parametric Correlation Analysis

Eric B. Ford, Daniel C. Fabrycky, Jason H. Steffen, Joshua A. Carter, Francois Fressin, Matthew J. Holman, Jack J. Lissauer, Althea V. Moorhead, Robert C. Moreh… 展开作者

Eric B. Ford, Daniel C. Fabrycky, Jason H. Steffen, Joshua A. Carter, Francois Fressin, Matthew J. Holman, Jack J. Lissauer, Althea V. Moorhead, Robert C. Morehead, Darin Ragozzine, Jason F. Rowe, William F. Welsh, Christopher Allen, Natalie M. Batalha, William J. Borucki, Stephen T. Bryson, Lars A. Buchhave, Christopher J. Burke, Douglas A. Caldwell, David Charbonneau, Bruce D. Clarke, William D. Cochran, Jean-Michel Désert, Michael Endl, Mark E. Everett, Debra A. Fischer, Thomas N. Gautier, Ron L. Gilliland, Jon M. Jenkins, Michael R. Haas, Elliott Horch, Steve B. Howell, Khadeejah A. Ibrahim, Howard Isaacson, David G. Koch, David W. Latham, Jie Li, Philip Lucas, Phillip J. MacQueen, Geoffrey W. Marcy, Sean McCauliff, Fergal R. Mullally, Samuel N. Quinn, Elisa Quintana, Avi Shporer, Martin Still, Peter Tenenbaum, Susan E. Thompson, Guillermo Torres, Joseph D. Twicken, Bill Wohler

摘要:

提出了一种基于凌日时刻变化(TTV)和动力学稳定性相结合的凌日行星确认方法。相关的TTV提供了这对身体在同一物理系统中的证据。轨道的稳定性提供了行星体系中凌日伴星质量的上限。本文介绍了一种非参数技术,用于量化的统计意义上的TTV的两个TTV数据集的相关性的基础上。我们应用这种方法来分析的过境时间变化的两颗恒星与多个过境行星的开普勒确定的候选人。我们确认四个凌日行星在两个多行星系统的基础上,他们的TTV和动力学稳定性的约束。在这些系统中,还有三颗候选行星没有被确认为行星,但一旦进一步的观测和分析成为可能,它们可能被确认为真正的行星。如果所有这些都得到证实,这些系统将接近4:6:9和2:4:6:9的周期。我们的研究结果表明,TTV提供了一个强大的工具,用于确认过境行星,包括低质量行星和行星周围的暗淡的恒星,多普勒后续是不实际的与现有的设施。开普勒的持续观测将大大改善对行星质量和轨道的限制,并为探测更多的非凌日行星提供灵敏度。如果开普勒的观测时间延长到8年,那么类似的分析可能会证实在太阳型恒星的宜居带内或附近存在多个密集的小型凌日行星。

英文摘要:

We present a new method for confirming transiting planets based on the combination of transit timingn variations (TTVs) and dynamical stability. Correlated TTVs provide evidence that the pair of bodies are in the same physical system. Orbital stability provides upper limits for the masses of the transiting companions that are in the planetary regime. This paper describes a non-parametric technique for quantifying the statistical significance of TTVs based on the correlation of two TTV data sets. We apply this method to an analysis of the transit timing variations of two stars with multiple transiting planet candidates identified by Kepler. We confirm four transiting planets in two multiple planet systems based on their TTVs and the constraints imposed by dynamical stability. An additional three candidates in these same systems are not confirmed as planets, but are likely to be validated as real planets once further observations and analyses are possible. If all were confirmed, these systems would be near 4:6:9 and 2:4:6:9 period commensurabilities. Our results demonstrate that TTVs provide a powerful tool for confirming transiting planets, including low-mass planets and planets around faint stars for which Doppler follow-up is not practical with existing facilities. Continued Kepler observations will dramatically improve the constraints on the planet masses and orbits and provide sensitivity for detecting additional non-transiting planets. If Kepler observations were extended to eight years, then a similar analysis could likely confirm systems with multiple closely spaced, small transiting planets in or near the habitable zone of solar-type stars.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑