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Stellar Orbits in Barred Galaxies with Nuclear Rings

Published online by Cambridge University Press:  12 April 2016

Clayton H. Heller  and
Isaac Shlosman
Clayton H. Heller
Affiliation:
Universitäts Sternwarte, Geismarlandstraβe 11, D-37083 Göttingen, Germany
Isaac Shlosman
Affiliation:
Department of Physics and Astronomy, University of Kentucky, Lexington, KY 40506-0055, USA

Abstract

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We investigate the dynamical response of stellar orbits in a rotating barred galaxy potential to the perturbation by a nuclear gaseous ring. The change in 3D periodic orbit families is examined as the gas accumulates near the inner Lindblad resonance. It is found that the x2/x3 loop extends to higher Jacobi energy and a vertical instability strip forms in each family. These strips are connected by a symmetric/anti-symmetric pair of 2:2:1 3D orbital families. A significant distortion of the x1 orbits is observed in the vicinity of the ring, which leads to the intersection between orbits over a large range of the Jacobi integral. We also find that a moderately elliptical ring oblique to the stellar bar produces significant phase shifts in the x1 orbital response.

Type
Posters of Part VII and Part VIII
Information
International Astronomical Union Colloquium , Volume 157: Barred Galaxies , 1996 , pp. 467 - 469
Copyright
Copyright © Astronomical Society of the Pacific 1996

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