Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983ap%26ss..95..431s&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 95, no. 2, Sept. 1983, p. 431-438.
Astronomy and Astrophysics
Astrophysics
Galactic Evolution, Galactic Structure, Asymmetry, Disk Galaxies, Gas Dynamics, Perturbation Theory, Velocity Distribution
Scientific paper
The mechanism for the persistence of asymmetry put forward by Baldwin et al. (1980) bears resemblance to 'free oscillation'. The question whether there is another possibility that can cause forced oscillation, that is, whether there is a factor that can maintain the lopsidedness, is considered. It is known from observations in the range of 1500 pc near the sun that the dispersion velocity distribution is elliptical in the galactic plane and the principal axis of the ellipse is different from the radial direction of the galaxy. Whether this factor provides a maintenance mechanism for lopsidedness is considered. The method of continuum mechanics is adopted.
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