自1995年第一颗环绕类太阳恒星的太阳系外行星被发现以后，地基与空基太阳系外行星搜寻项目不断开展。太阳系外行星系统的研究帮助人类认识行星系统的形成与演化，以及搜寻处于宜居带的类地行星乃至系外生命。目前，系外行星科学已成为天体物理学一个重要研究领域。. 通过研究行星间引力摄动所致的凌食时间对严格周期性的偏离现象，即Transit Timing Variation（TTV）现象，可以对行星侯选体进行证认与刻画，以及探测系统中的其他行星。随着近15年TTV方法的发展和完善，已有大量TTV相关的系外行星探测与刻画研究，但探测到非凌食系外行星的案例却十分匮乏。本项目计划结合空基系外行星巡天数据与地基凌食测光数据，借助TTV方法首次对非凌食系外行星进行系统性的探测与刻画，并对Kepler望远镜发现的多凌食系统与含非凌食系外行星的单凌食系统开展对比研究，为系外行星系统的形成与演化模型探寻新线索。

Since the discovery of the first extrasolar planet orbiting a Sun-like star in 1995, more and more ground- and space-based exoplanet-hunting projects have been implemented. The study of exoplanetary systems cannot only help us understand the formation and evolution of planetary systems, but also search for Earth-like exoplanets in habitable zones and even alien lives. To date, exoplanetary science has become an important research field in astrophysics. . By studying the deviations of the transit times of transiting exoplanets from constant orbital periods, namely Transit Timing Variation (TTV), caused by the gravitational perturbations from other exoplanets, exoplanet candidates could be confirmed and characterized, as well as the detections of new exoplanets. With the development and improvement of the TTV method in the past 15 years, there have been a lot of researches related to the TTV method on detections and characterizations of exoplanets. However, the cases with actually detected non-transiting exoplanets are relatively scarce. This project is designed to systematically detect the non-transiting exoplanets at the first time in some exoplanetary systems and then characterize them with the TTV method, through combining space-based exoplanet survey data and ground-based photometric data. We will also carry out a comparative study between the multi-transiting exoplanetary systems discovered by Kepler mission and the single-transiting exoplanetary systems with non-transiting exoplanets detected, so as to provide additional clues for the exoplanetary systems' formation and evolution models.