The velocity evolution of galaxy clustering

Details The velocity evolution of galaxy clustering The velocity evolution of galaxy clustering

Feb 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...253..470s&link_type=abstract

Astrophysical Journal, Part 1, vol. 253, Feb. 15, 1982, p. 470-478.

Mathematics

Logic

8

Astronomical Models, Big Bang Cosmology, Galactic Clusters, Galactic Evolution, Velocity Distribution, Computerized Simulation, Hubble Constant, Interstellar Magnetic Fields, Mass Distribution

Scientific paper

The changing velocity distribution of galaxies as they cluster in computer models of the expanding universe is studied. Isolated field galaxies are distinguished from clustered galaxies, and it is found that the velocity dispersion of the most extreme field galaxies does not decrease adiabatically, but is dominated by the perturbations of distant large clusters as they form, decreasing much more slowly than the inverse expansion length scale. Theoretical models indicate a low density universe with a cosmological density parameter of not greater than about 0.1.

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