摘要
本文简要地介绍了目前太阳系外行星系统动力演化的研究现状。我们用数值模拟方法和并从分析的角度研究了GJ 876和HD 82 943。通过分析不同的共面和非共面构型 ,我们发现所有的稳定轨道都和2 :1共振有关 ,此外我们还发现在这两个系统内存在近星点共振—对应了两个行星的近星点经度之差在1 80 0或者 0 0附近秤动。这两种机制对维持行星系统的稳定性起了重要作用。
In this paper we briefly introduce the present studies on the dynamics of the extrasolar planets. With the numerical simulations and analytical methods, we investigate two systems-GJ 876 and HD 82943. By analyzing various coplanar and non-coplanar configurations, we find that the stable orbits of the two systems are involved in the 2:1 mean motion resonance, and there also exists the apsidal resonance in these systems, corresponding to the libration of the relative apsidal longitudes about 180° or 0°.Both of the mechanisms are responsible for the stability of the planetary systems.
基金
国家自然科学基金资助 (编号 10 2 0 30 0 5
10 1730 0 6
10 2 330 2 0 )
