Astronomy and Astrophysics – Astrophysics – Galaxy Astrophysics
Scientific paper
2012-03-30
Research in Astronomy and Astrophysics (RAA), 2012, vol. 12(4), 383-399
Astronomy and Astrophysics
Astrophysics
Galaxy Astrophysics
Published in Research in Astronomy and Astrophysics journal
Scientific paper
We study the behavior of orbits in two different galactic dynamical models, describing the motion in the central parts of a triaxial elliptical galaxy with a dense nucleus. Numerical experiments show that both models display regular motion together with extended chaotic regions. A detailed investigation of the properties of motion is made for the 2D and 3D Hamiltonian systems, using a number of different dynamical parameters, such as the Poincare surface of section, the maximal Lyapunov Characteristic Exponent, the S(c) spectrum, the S(w) spectrum and the P(f) indicator. The numerical calculations suggest that the properties of motion in both potentials are very similar. Our results show that one may use different kinds of gravitational potentials in order to describe the motion in triaxial galaxies while obtaining quantitatively similar results.
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