2013/06/18 by Euaggelos E. Zotos, Daniel D. Carpintero · 2 citations
Engineering · Physics and Astronomy · #Cosmology and Gravitation Theories #Galaxies: Formation, Evolution, Phenomena #Spacecraft Dynamics and Control #astro-ph.GA
paper · pdf · doi:10.1007/s10569-013-9500-0
published as CMDA, 2013, vol. 116, pp. 417-438 · Published in Celestial Mechanics & Dynamical Astronomy (CMDA) journal
openalex publication_date 2013/06/18 · arxiv created 2013/07/16 · arxiv updated 2013/07/17 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We investigate the regular or chaotic nature of star orbits moving in the meridional plane of an axially symmetric galactic model with a disk and a spherical nucleus. We study the influence of some important parameters of the dynamical system, such as the mass and the scale length of the nucleus, the angular momentum or the energy, by computing in each case the percentage of chaotic orbits, as well as the percentages of orbits of the main regular resonant families. Some heuristic arguments to explain and justify the numerically derived outcomes are also given. Furthermore, we present a new method to find the threshold between chaos and regularity for both Lyapunov Characteristic Numbers and SALI, by using them simultaneously.