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Star-gas density waves in spiral galaxiesThe steady state dynamics of spiral galaxies is analyzed as a two-component system consisting of stars and gas within the framework of the WKB density wave theory. The gravitational influence of the gas is included for the first time in a steady state calculation. The full set of equations for a star-gas galaxy is presented, and the equations are analyzed for small-amplitude forcing. Wave properties near the solar circle are examined, and it is found that the large-scale gas shock disappears for gas content above 8 percent. Instead, gas density profiles change to highly symmetric shapes as a result of the action of the gas self-gravity. The stellar wave is damped by the torque exerted by the gas.
Document ID
19870033305
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Lubow, Stephen H.
(Space Telescope Science Inst. Baltimore, MD, United States)
Cowie, Lennox L.
(Space Telescope Science Institute; Johns Hopkins University Baltimore, MD, United States)
Balbus, Steven A.
(Princeton University New Observatory, NJ, United States)
Date Acquired
August 13, 2013
Publication Date
October 15, 1986
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 309
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
87A20579
Funding Number(s)
CONTRACT_GRANT: NGL-31-001-007
Distribution Limits
Public
Copyright
Other

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