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2000ApJ...540..154E - Astrophys. J., 540, 154-169 (2000/September-1)
Gaseous vortices in barred spiral galaxies.
ENGLAND M.N., HUNTER J.H.Jr and CONTOPOULOS G.
Abstract (from CDS):
If a gas-rich, barred spiral galaxy were observed in H I with sufficient resolution and signal-to-noise ratio, and if the gas velocities in that region are transformed so that they are ``observed'' in a rigidly rotating frame, having its origin at the galaxy's center, a pair of vortices should appear with position angles approximately 90° with respect to the bar when the angular velocity of the observing frame equals the pattern speed of the bar. Based upon these simulations, we estimate that the pattern speed and corotation radius can be deduced to within approximately 5%-25% of their true values depending upon the quality of the observations.
Abstract Copyright: ∼
Journal keyword(s): Galaxies: Kinematics and Dynamics - Galaxies: Spiral - Hydrodynamics
Simbad objects: 4
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