Study of galaxy correlations: evidence for the gravitational instability picture in a dense universe.
Abstract
Two developments in the systematic study of galaxy correlation functions are discussed: a reduction of the ShaneWirtanen (1967) galaxy counts which greatly sharpens estimates of galaxy correlation functions and a method for computing the expected evolution of the twopoint correlation function. Results are presented for an application of the latter method to the simplest case of an Einsteinde Sitter model, and an expression for the zeroth velocity moment is obtained whose form agrees with the hierarchical matter clustering expected in the gravitationalinstability picture. Extrapolation to a density parameter with a value less than unity is considered.
 Publication:

The Astrophysical Journal
 Pub Date:
 March 1977
 DOI:
 10.1086/182386
 Bibcode:
 1977ApJ...212L.107D
 Keywords:

 Big Bang Cosmology;
 Correlation;
 Galactic Evolution;
 Gravitational Effects;
 Astronomical Catalogs;
 Bbgky Hierarchy;
 Unsteady State;
 Astrophysics