Abstract
In this paper, we study the linear stability of the relative equilibria for homogeneous and quasihomogeneous potentials. First, in the case the potential is a homogeneous function of degree −a, we find that any relative equilibrium of the n-body problem with a>2 is spectrally unstable. We also find a similar condition in the quasihomogeneous case. Then we consider the case of three bodies and we study the stability of the equilateral triangle relative equilibria. In the case of homogeneous potentials we recover the classical result obtained by Routh in a simpler way. In the case of quasihomogeneous potentials we find a generalization of Routh inequality and we show that, for certain values of the masses, the stability of the relative equilibria depends on the size of the configuration.
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Santoprete, M. Linear Stability of the Lagrangian Triangle Solutions for Quasihomogeneous Potentials. Celestial Mech Dyn Astr 94, 17–35 (2006). https://doi.org/10.1007/s10569-005-2288-9
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DOI: https://doi.org/10.1007/s10569-005-2288-9