Dinaminis faktorius griaunantis taisyklingą judėjimą skersėtose galaktikose

We study the behavior of orbits in a barred galaxy model composed of an harmonic oscillator potential plus a potential of a dense nucleus. The presence of a small mass nucleus destroys the figure-eight orbits which turn gradually to elongated box orbits supporting the bar. For larger values of the nucleus mass the majority of orbits become chaotic. It is shown that the percentage of chaotic orbits increases as the nucleus mass increases. The chaotic region also increases as the angular velocity increases. A connection between the angular velocity and angular momentum is presented. All numerical calculations strongly suggest that orbits with large average values of angular momentum remain regular. Comparison to previous work shows that the present results show similarities with those obtained for axially symmetrical galaxies