A Theory of Bending Waves with Applications to Disk Galaxies

@inproceedings{Mark1983ATO,
  title={A Theory of Bending Waves with Applications to Disk Galaxies},
  author={James W.-K. Mark},
  year={1983}
}
A theory of bending waves is surveyed which provides an explanation for the required amplification of the warp in the Milky Way. It also provides for self-generated warps in isolated external galaxies. The shape of observed warps and partly their existence in isolated galaxies are indicative of substantial spheroidal components. The theory also provides a plausible explanation for the bending of the inner disk (< 2 kpc) of the Milky Way. 
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2 Citations

2 Citations

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References

SHOWING 1-10 OF 40 REFERENCES
Unstable spiral modes in disk-shaped galaxies.
  • Y. Lau, C. Lin, J. Mark
  • Physics
    Proceedings of the National Academy of Sciences of the United States of America
  • 1976
TLDR
The mechanisms for the maintenance and the excitation of trailing spiral modes of density waves in diskshaped galaxies are substantiated by an analysis of the gas-dynamical model of the galaxy.
Aperture synthesis of neutral hydrogen in the galaxy M33
Observations of neutral hydrogen in the galaxy M33 with resolutions of 2' and 10 km s/sup -1/ are described. Detailed modeling has revealed weak evidence for spiral density waves with an arm-interarm…
Can galaxy warps be used to provide constraints on halo properties?
The prevalence of flat rotation curves in external galaxies1 strongly suggests an extensive but as yet unseen halo component. However, as direct observations of the implied matter distribution have…
The hose-pipe instability in stellar systems
Indications are that instabilities play an important role in many of the phenomena of stellar dynamics. Examples of such phenomena are: the formation of spiral arms, and the evolution of stellar…
Discrete spiral modes in disk galaxies: Some numerical examples based on density wave theory.
TLDR
From the growth rates obtained, it appears likely that several spiral modes coexist in a given disk galaxy, according to the recently developed asymptotic theory of density waves for spiral structure in galaxies.
Twisted and warped disks as consequences of heavy halos. [galactic structure
Observationally testable consequences of the hypothesis that galactic disks are confined less by their self-gravity than that of some hot stellar component are sought. Theoretical and observational…
On density waves in galaxies. III. Wave amplification by stimulated emission
Through outward transport of angular momentum, the circular rotation in disk galaxies becomes an abundant ''source'' for spiral density waves. Increases in wave angular momentum of an order of…
Persistence of gaseous warps
Galactic warps of the gaseous component beyond the boundary of a finite stellar disk or at radii greater than 5 radial scale heights in an exponential disk can persist for several rotation times. The…
On Density Waves in Galaxies. 11. the Turning-Point Problem at the Corotation Region
A more careful analysis has been made of the galactic density waves near the corotation region where the wave pattern speeds are the same as the local circular speed of the disk. Some ambiguities…
Why is the central gas disk of the Galaxy tilted?
Independent analyses of the HI and CO within 2 kpc of the galactic centre have shown that the gas distribution is best described as a disk-like structure with a rotation axis inclined 20–25° to that…
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