Evolution of the Moment of Inertia of Three-Body Figure-Eight Choreography

Details Evolution of the Moment of Inertia of Three-Body Figure-Eight Choreography Evolution of the Moment of Inertia of Three-Body Figure-Eight Choreography

2003-04-10

arxiv.org/abs/math-ph/0304014v3

Journal of Physics A: Mathematical and General, volume 36, issue 42, pages 10537 - 10549, (2003)

Physics

Mathematical Physics

Scientific paper

10.1088/0305-4470/36/42/009

We investigate three-body motion in three dimensions under the interaction potential proportional to r^alpha (alpha \neq 0) or log r, where r represents the mutual distance between bodies, with the following conditions: (I) the moment of inertia is non-zero constant, (II) the angular momentum is zero, and (III) one body is on the centre of mass at an instant. We prove that the motion which satisfies conditions (I)-(III) with equal masses for alpha \neq -2, 2, 4 is impossible. And motions which satisfy the same conditions for alpha=2, 4 are solved explicitly. Shapes of these orbits are not figure-eight and these motions have collision. Therefore non-conservation of the moment of inertia for figure-eight choreography for alpha \neq -2 is proved. We also prove that the motion which satisfies conditions (I)-(III) with general masses under the Newtonian potential alpha=-1 is impossible.

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