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Properties of the Galactic Bar from Hydrodynamical Simulations

Published online by Cambridge University Press:  25 May 2016

Benjamin J. Weiner  and
J.A. Sellwood
Benjamin J. Weiner
Affiliation:
Dept. of Physics and Astronomy, Rutgers University P.O. Box 849, Piscataway, NJ 08855, USA
J.A. Sellwood
Affiliation:
Dept. of Physics and Astronomy, Rutgers University P.O. Box 849, Piscataway, NJ 08855, USA

Extract

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It is well known that the existence of H I and CO gas at “forbidden” velocities in longitude-velocity (l–V) diagrams of the inner Galaxy (e.g. Liszt & Burton 1980, Liszt 1992) is inconsistent with circular motion in an axisymmetric potential. Gas flow in a barred potential could be consistent with the observations, however. We have compared the observations to 2-D hydrodynamical simulations of gas flows in a family of barred potentials. The gas flow pattern is very sensitive to the assumed potential, and the l–V distribution of cool gas in the inner Galaxy places strong constraints on several parameters of the Milky Way bar.

Type
Chapter 2: Is the Milky Way a Barred Spiral Galaxy?
Information
Symposium - International Astronomical Union , Volume 169: Unsolved Problems of the Milky Way , 1996 , pp. 145 - 146
Copyright
Copyright © Kluwer 1996 

References

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