The formation of clusters of galaxies containing dark matter

Details The formation of clusters of galaxies containing dark matter The formation of clusters of galaxies containing dark matter

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...335..532w&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 335, Dec. 15, 1988, p. 532-541.

Statistics

Computation

51

Dark Matter, Galactic Clusters, Galactic Evolution, Galactic Mass, Computational Astrophysics, Dynamic Models

Scientific paper

Two-component N-body simulations have been performed to study the formation of rich clusters of galaxies containing both luminous and dark matter. Spatial segregation between the galaxies and the dark matter develops very rapidly in these simulations, on a time scale shorter than the collapse time of the cluster, with the galaxy distribution being much more strongly clustered than that of the dark matter. Such segregation provides a natural means of biasing the distribution of galaxies relative to the dark matter distribution. Virial mass estimates based on the observed galaxy positions and velocities are found to systematically underestimate the total cluster mass by as much as a factor of 5 - 10. A simple dynamical model is presented to explain these numerical results qualitatively.

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