The development of structure in the expanding universe

Details The development of structure in the expanding universe The development of structure in the expanding universe

Jul 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...223l..59s&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 223, July 15, 1978, p. L59-L62.

Astronomy and Astrophysics

Astrophysics

72

Astronomical Models, Big Bang Cosmology, Galactic Clusters, Condensation, Density Distribution, Galactic Evolution, Hubble Diagram, Mass Distribution, Mass Spectroscopy, Velocity Measurement

Scientific paper

A model for clustering in an expanding universe is developed based on an application of the coagulation equation to the collision and aggregation of bound condensations. While the growth rate of clustering is determined by the rate at which density fluctuations reach the nonlinear regime and therefore depends on the initial fluctuation spectrum, the mass spectrum rapidly approaches a self-similar limiting form. This form is determined by the tidal processes which lead to the merging of condensations, and is not dependent on initial conditions.

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