The estimation of the mean density in the universe

Details The estimation of the mean density in the universe The estimation of the mean density in the universe

Apr 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982ap%26ss..83..437f&link_type=abstract

Astrophysics and Space Science, vol. 83, no. 1-2, Apr. 1982, p. 437-439.

Physics

Cosmology, Galactic Clusters, Matter (Physics), Space Density, Universe, Astronomical Models, Galactic Structure, Mass To Light Ratios

Scientific paper

The mean density of matter, as estimated from deep optical samples of galaxies, is found to be too low to close the universe. It is noted, however, that additional considerations do not exclude such a possibility. Referring to Kron (1978), Spinrad (1980) and Butcher et al. (1980), clusters of galaxies are assumed in deep surveys. If it is also assumed that for galaxies in clusters the mass to light ratio is 325 (Faber and Gallagher, 1979), then the value of the mean density of the universe increases.

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