Gas flow in the barred spiral galaxy NGC 5383

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Astronomical Models, Galactic Structure, Gas Flow, Spiral Galaxies, Astrodynamics, Astronomical Spectroscopy, Flow Geometry, Flow Velocity, Hydrodynamics, Velocity Measurement

Scientific paper

Line-of-sight gas velocities calculated from a numerical hydrodynamical model of a barred spiral galaxy are compared with the observations and models made by Peterson, Rubin, Ford, and Thonnard of the gas flow in NGC 5383. The hydrodynamical model provides a somewhat better fit to the observations of NGC 5383 than does their symmetric, warped-disk model. It is argued that the basic model appropriate to understanding the gas motions in barred spiral galaxies is not circular rotation but rather a characteristic elliptical pattern of flow.

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