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Motions and Deformations of the Inner-Galaxy Neutral Gas Layer

Published online by Cambridge University Press:  25 May 2016

H. S. Liszt  and
W. B. Burton
H. S. Liszt
Affiliation:
National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville VA USA 22903
W. B. Burton
Affiliation:
Sterrewacht, Leiden Postbus 9513 2300 RA Leiden, Netherlands

Abstract

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Neutral gas in the inner few kpc of the Milky Way is notable for showing strong non-circular motions, large excursions from the nominal galactic plane, and an overwhelming preponderance of molecular (rather than atomic) neutral gas. Here, we discuss the coherent nature of the kpc-scale tilts seen in H I and CO emission and demonstrate the congruence of the inner-Galaxy atomic and molecular gas distributions, out more than 1 kpc in radius and 300 pc vertically from the center. We point out that features in inner-Galaxy spectra can usually not be identified with discrete, underlying material entities, but instead arise solely as the result of kinematic projection effects.

Type
Chapter 4: Is there a Consistent Picture of the Inner kpc of the Milky Way?
Information
Symposium - International Astronomical Union , Volume 169: Unsolved Problems of the Milky Way , 1996 , pp. 297 - 310
Copyright
Copyright © Kluwer 1996 

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