FAST INVERSION METHOD FOR DETERMINATION OF PLANETARY PARAMETERS FROM TRANSIT TIMING VARIATIONS
FAST INVERSION METHOD FOR DETERMINATION OF PLANETARY PARAMETERS FROM TRANSIT TIMING VARIATIONS
复制标题
DOI：
10.1088/2041-8205/709/1/l44
复制
发表时间：
2009-11
期刊：
影响因子：
--
通讯作者：
D. Nesvorný;C. Beaugé
中科院分区：
文献类型：
--
作者：
D. Nesvorný;C. Beaugé
凌日时间变化（TTV）方法依赖于监测已知系外行星凌日时间的变化。系统中的非凌日行星可以从TTV与凌日行星的引力相互作用中推断出来。TTV方法对其他方法无法探测到的低质量行星敏感。在这里，我们描述了一个快速算法，可用于确定的质量和轨道的非过境行星的TTV数据。我们应用我们的代码，ttvim.f，各种各样的行星系统，以测试TTV反演问题的唯一性和它对TTV观测精度的依赖。我们发现，行星参数，包括行星的质量和相互轨道倾角，可以确定从TTV数据集，应该在不久的将来成为可用。与径向速度技术不同，TTV方法可以用来描述多行星系统的倾角分布。
The transit timing variation (TTV) method relies on monitoring changes in timing of transits of known exoplanets. Non-transiting planets in the system can be inferred from TTVs by their gravitational interaction with the transiting planet. The TTV method is sensitive to low-mass planets that cannot be detected by other means. Here we describe a fast algorithm that can be used to determine the mass and orbit of the non-transiting planets from the TTV data. We apply our code, ttvim.f, to a wide variety of planetary systems to test the uniqueness of the TTV inversion problem and its dependence on the precision of TTV observations. We find that planetary parameters, including the mass and mutual orbital inclination of planets, can be determined from the TTV data sets that should become available in near future. Unlike the radial velocity technique, the TTV method can therefore be used to characterize the inclination distribution of multi-planet systems.