Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984ap%26ss.105..109b&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 105, no. 1, Oct. 1984, p. 109-130.
Astronomy and Astrophysics
Astrophysics
5
Big Bang Cosmology, Galactic Evolution, Galactic Rotation, Shear Flow, Astronomical Models, Elliptical Galaxies, Luminosity, Mass Distribution, Velocity Distribution, Viscosity
Scientific paper
Initial conditions are derived from the fragmentation/shear flow model of galaxy formation and are used as input to the viscous action presumed to begin as soon as a galactic disk forms. A simple differential equation is found to describe the turbulent viscous evolution of a flat disk. Solutions to this equation produce rotation curves that closely resemble those observed in spiral and elliptical galaxies. For spirals, by using the mass distributions derived from the rotation curves and from Seiden's theory of star formation, exponential luminosity profiles are produced.
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