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Paper: Constraints on Nested Bars -- Implications for Gas Inflow
Volume: 275, Disks of Galaxies: Kinematics, Dynamics and Perturbations
Page: 251
Authors: Maciejewski, W.
Abstract: A contradiction appears between a wide-spread belief that nested bars enhance gas inflow to the galactic centre, and the recent dynamical models indicating that inner bars should rather prohibit such inflow. Can the existing models of dynamically possible double bars be modified to enable strong inflow in the secondary bar? Simple dynamical considerations support the conclusion that in general, double bars in resonant coupling do not enhance gas inflow. However, stronger inflow with straight shocks in the inner bar can occur if there is no resonant coupling of the commonly assumed form between the bars.
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