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arXiv 1302.5247astro-ph.EPastro-ph.SR
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多行星系外行星系统的动力学约束

Dynamical Constraints on Multi-Planet Exoplanetary Systems

Jonathan Horner, Robert A. Wittenmyer, Chris G. Tinney, Paul Robertson, Tobias C. Hinse, Jonathan P. Marshall

摘要:

作为不断努力探测更多系外行星系统的直接结果,越来越多的多行星系统正在被宣布。但是,这些系统中有多少是真正的,他们似乎?在许多情况下,宣布这类系统仅仅是根据轨道与观测数据的吻合程度,而没有试图查明拟议的轨道在动力学上是否实际可行。因此,可以肯定的是,正在宣布的行星系涉及行星在轨道上运动,在短短几百年的时间尺度上动态不稳定。在这里,我们提出了动力学模拟的结果,调查轨道的稳定性和演变的一些最近发现的系外行星系统。这些模拟使我们能够创建这些系统的高度详细的动力学地图,使我们能够更好地约束其中包含的行星的轨道。在某些情况下,我们的结果甚至导致行星本身的存在受到质疑。

英文摘要:

As a direct result of ongoing efforts to detect more exoplanetary systems, an ever-increasing number of multiple-planet systems are being announced. But how many of these systems are truly what they seem? In many cases, such systems are announced solely on the basis of orbital fits to observational data, and no attempt is made to see whether the proposed orbits are actually dynamically feasible. As a result, it is certain that planetary systems are being announced that involve planets moving on orbits that would be dynamically unstable on timescales of just a few hundred years. Here, we present the results of dynamical simulations that investigate the orbital stability and evolution of a number of recently discovered exoplanetary systems. These simulations have enabled us to create highly detailed dynamical maps of those systems, allowing us to better constrain the orbits of the planets contained therein. In some cases, our results have even led to the very existence of the planets themselves being called into question.

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。

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