Gas distribution in the central region of the galaxy. III. A barlike model of the inner-galaxy gas based on improved H I data

Journal Article · Sat Mar 15 00:00:00 EST 1980 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/157803· OSTI ID:5365969

Liszt, H S; Burton, W B

We discuss the morphology and kinematics of gas lying within 2 kpc of the galactic nucleus in terms of material confined to a barlike structure which is tilted 24 /sup 0/ with respect to the rotation axis of the Galaxy at large. The model embodies only motions along closed elliptical paths and thereby involves no net flow of mass out of the inner regions of the Galaxy. Angular momentum is conserved because the motions obey the equal-areas law. As with the circular model employed earlier in this series of papers, the tilted-bar model accounts for the appearance of a diverse assortment of individual condensations in position-velocity maps, such as the nuclear disk, the connecting arm, the molecular ring, and other discrete features usually considered to have been ejected from the core of the Galaxy. The model accounts for these features without any local kinematic perturbations or density enhancements.

• Research Organization: National Radio Astronomy Observatory, Green Bank, West Virginia
• OSTI ID: 5365969
• Journal Information: Astrophys. J.; (United States), Vol. 236:3
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMIC GASES
PARTICLE KINEMATICS
SPATIAL DISTRIBUTION
GALAXY NUCLEI
MILKY WAY
ANGULAR MOMENTUM
CARBON MONOXIDE
EMISSION
H1 REGIONS
ROTATION
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
COSMIC RADIO SOURCES
DISTRIBUTION
FLUIDS
GALAXIES
GASES
MOTION
OXIDES
OXYGEN COMPOUNDS
640105* - Astrophysics & Cosmology- Galaxies