Symmetry in hierarchical cosmology

Details Symmetry in hierarchical cosmology Symmetry in hierarchical cosmology

Jul 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976ap%26ss..42..477w&link_type=abstract

Astrophysics and Space Science, vol. 42, July 1976, p. 477-481.

Astronomy and Astrophysics

Astronomy

Astronomical Models, Cosmology, Galactic Clusters, Hierarchies, Symmetry, Universe, Cartesian Coordinates, Fourier Series, Radio Sources (Astronomy), Red Shift

Scientific paper

The paper responds to the objection often brought against hierarchical cosmology, namely that the Universe in fact looks symmetric as regards number counts of objects on a sufficiently large scale, which is difficult to reconcile with an indefinitely clumped system of stars, galaxies, groups of galaxies, clusters of galaxies, superclusters, and so on. It is asserted that a necessary condition for symmetry is that observers should always be in one of the densest units of a level, which is satisfied for beings like humans who live on planets near stars. A sufficient condition is shown to be that the ratio of cluster diameter to distance between cluster centers be greater than about 0.1.

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