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Orbit classification in the meridional plane of a disk galaxy model with a spherical nucleus.(Report)

Zotos, Euaggelos E. ; Carpintero, Daniel D.

Celestial Mechanics and Dynamical Astronomy, August, 2013, Vol.116(4), p.417(22) [Tạp chí có phản biện]

ISSN: 0923-2958

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  • Nhan đề:
    Orbit classification in the meridional plane of a disk galaxy model with a spherical nucleus.(Report)
  • Tác giả: Zotos, Euaggelos E. ; Carpintero, Daniel D.
  • Chủ đề: Orbits (Astrophysics) -- Analysis
  • Là 1 phần của: Celestial Mechanics and Dynamical Astronomy, August, 2013, Vol.116(4), p.417(22)
  • Mô tả: Byline: Euaggelos E. Zotos (1), Daniel D. Carpintero (2,3) Keywords: Galactic Dynamics; Kinematics; Galactic structure chaos threshold; SALI; Maximal Lyapunov characteristic number Abstract: 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. Author Affiliation: (1) Department of Physics, School of Science, Aristotle University of Thessaloniki, 541 24 , Thessaloniki, Greece (2) Facultad de Ciencias Astronomicas y Geofisicas, Universidad Nacional de La Plata, Paseo del Bosque S/N, 1900 , La Plata, Argentina (3) Instituto de Astrofisica de La Plata, Conicet-Universidad Nacional de La Plata, Paseo del Bosque S/N, 1900 , La Plata, Argentina Article History: Registration Date: 07/06/2013 Received Date: 14/04/2013 Accepted Date: 07/06/2013 Online Date: 19/06/2013
  • Ngôn ngữ: English
  • Số nhận dạng: ISSN: 0923-2958

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