Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980ap%26ss..70..493b&link_type=abstract
Astrophysics and Space Science, vol. 70, no. 2, July 1980, p. 493-504.
Astronomy and Astrophysics
Astrophysics
5
Astronomical Models, Galactic Evolution, Spiral Galaxies, Angular Momentum, Density Distribution, Elliptical Galaxies, Mass Distribution, Radial Distribution
Scientific paper
It has been verified that the analytical results derived in a previous article for elliptical galaxies may also be used to describe spiral galaxies. Exploration of the model for small values of the principal parameter theta yields surface mass density distributions as functions of radius which, while always displaying the exponential disk, describe both of the subcategories of spiral galaxies. Within the constraints of the model, the two main questions concerning spirals posed some years ago by Freeman appear to be successfully addressed. An intrinsic model mechanism has been identified that could account for the extended state of elliptical galaxies, as opposed to the flat disks of spirals. In general, the model correctly describes the relative sizes of the various types of galaxies.
Brown Wilbur K.
Gritzo L. A.
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