Astronomy and Astrophysics – Astronomy
Scientific paper
May 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992mnras.256..307r&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 256, no. 2, May 15, 1992, p. 307-320. Research supporte
Astronomy and Astrophysics
Astronomy
65
Celestial Mechanics, Disk Galaxies, Galactic Structure, Interstellar Matter, Spiral Galaxies, Dynamic Stability, Kinematic Equations, Parameterization
Scientific paper
The thickness scales and the local parameters relevant to both the equilibrium and stability of two-component galactic disks are studied. The results obtained, as regards the vertical structure at equilibrium of two-component galactic disks, are used to investigate their local linear stability properties. Under reasonable assumptions, finite-thickness corrections to the local dispersion relation can be expressed in terms of two reduction factors weakening the response of the two components or, equivalently, lowering their equilibrium surface densities. An ansatz for such reduction factors, justified by extending the analysis performed for one-component purely stellar disks, is made, and the corresponding two-fluid marginal stability curve is studied in standard star-dominated and peculiar gas-dominated regimes. It is found that the stabilizing role of finite-thickness effects can partially counterbalance the destabilizing role of the cold interstellar gas in linear regimes.
No associations
LandOfFree
Stability of thick two-component galactic discs does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Stability of thick two-component galactic discs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stability of thick two-component galactic discs will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1518664