Orbital characteristics of dynamical models of elliptical galaxies

Astronomy and Astrophysics – Astronomy

Scientific paper

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Astronomical Models, Elliptical Galaxies, Orbital Mechanics, Stellar Orbits, Dynamic Models, Orbit Perturbation

Scientific paper

The authors use three different dynamical models for describing the motion in the meridian plane of an elliptical galaxy. Orbital characteristics of two polynomial models are compared with those given by a logarithmic potential for a fixed axial ratio of the equipotential surfaces. The authors also study the effects of an asymmetric perturbation caused by a companion galaxy on the orbital behaviour of the above models. Finally they present some theoretical arguments in order to support the numerical results.

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