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Paper: The clustering of light and of mass
Volume: 5, The Minnesota Lectures on Clusters of Galaxies and Large-Scale Structure
Page: 19
Authors: Oemler, Augustus, Jr.
Abstract: Consideration is given to contradictions between theoretical and observed values of the ratio of luminosity density to mass density in galaxies and groups of galaxies. The possibility that the universe is mainly composed of nonbaryonic matter is discussed. Grand unified theory and possible mechanisms of luminosity-mass segregation are reviewed. An analysis of existing data is conducted, showing that light and mass have the same distribution on scales larger than 100 kparsecs. This implies that baryons probably dominate the mass of the universe and that the cosmic density parameter (Omega) is about 0.15.
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