The influence of the irregular forces on the motions in the three-body problem

Details The influence of the irregular forces on the motions in the three-body problem The influence of the irregular forces on the motions in the three-body problem

2011-10-22

arxiv.org/abs/1110.4957v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

Scientific paper

The influence of the irregular forces on the evolution of a triple hierarchical stellar system moving in the field of stars have been studied. Triple hierarchical stellar systems are stable in contrary to the stellar systems with comparable distances between all components. We considered the motion in the frame of the general tree-body problem using differential equations of the motion with the Hamiltonian without short-periodic terms. For isolated triple stellar systems, where we took into account the perturbations until the third order, we obtained the solution in which the mean motions of both components have the secular accelerations. Under the influence of perturbations of the distant component the mean motion in the near pair is slowed and vice versa. The mean motion of the distant star is constantly increasing. These changes are small, but on the cosmological time interval the hierarchical systems will convert into stellar systems, in which all components have comparable distances between each other. Such systems become unstable. In a general case, if we take into account the irregular forces, the angular momentum of this system and its summary energy might be either loss or gain. These changes may influence on the dynamical evolution and stability of the stellar system.

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