Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...122..231t&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 122, no. 1-2, June 1983, p. 231-236.
Astronomy and Astrophysics
Astrophysics
Barred Galaxies, Disk Galaxies, Galactic Bulge, Halos, Orbit Perturbation, Orbital Mechanics, Angular Momentum, Circular Orbits, Equations Of Motion, Motion Stability, Periodic Variations
Scientific paper
The bulge-halo effects in a barred galaxy consisting of an axisymmetric background and a bar perturbation are investigated. The authors studied the effects on the stability of equilibrium points and on the properties of the main families of direct periodic orbits from the galactic center up to corotation. They found that the effect on the stability of the equilibrium points is significant. They also found that the bulge-halo component besides its effect on the relative extension of the main families of periodic orbits, may cause the reappearance of the main family of period orbits x2 which is stable between the two Inner Lindblad Resonances (ILR's) and the destruction of stability, between the two ILR's, of the second family x1 which extends from the galactic center up to corotation. Since the orbits of x2 are elongated perpendicularly to the bar, its reappearance has a weakening effect on the formation of a self-consistent bar between the two ILR's.
Michalodimitrakis M.
Terzides Ch.
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