The Apsidal Antialignment of the HD 82943 System

Details The Apsidal Antialignment of the HD 82943 System The Apsidal Antialignment of the HD 82943 System

2003-01-17

arxiv.org/abs/astro-ph/0301353v4

Celest.Mech.Dyn.Astron.87:113-120,2003

Astronomy and Astrophysics

Astrophysics

8 Pages, no figures, submitted to Celestial Mechanics and Dynamical Astronomy, Proceedings of IAU 189 Colloquium(Astrophysical

Scientific paper

10.1023/A:1026193724121

We perform numerical simulations to explore the dynamical evolution of the HD 82943 planetary system. By simulating diverse planetary configurations, we find two mechanisms of stabilizing the system: the 2:1 mean motion resonance between the two planets can act as the first mechanism for all stable orbits. The second mechanism is a dynamical antialignment of the apsidal lines of the orbiting planets, which implies that the difference of the periastron longitudes $\theta_{3}$ librates about $180^{\circ}$ in the simulations. We also use a semi-analytical model to explain the numerical results for the system under study.

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