Velocity fields around rich clusters of galaxies

Details Velocity fields around rich clusters of galaxies Velocity fields around rich clusters of galaxies

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...308..499v&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 308, Sept. 15, 1986, p. 499-509.

Statistics

Computation

61

Computational Astrophysics, Galactic Clusters, Many Body Problem, Velocity Distribution, Boundary Value Problems, Cosmology, Gravitational Effects, Mass Distribution, Virgo Galactic Cluster

Scientific paper

The authors study the nature of the velocity field around large clusters in Ω = 1 cosmological N-body simulations that have initial conditions which produce large-scale structure reasonably consistent with observations. The purpose is to test the accuracy of the spherical infall models commonly used to measure the mass of the Virgo supercluster and to characterize the nature of the deviations from simple spherical infall. The use of a spherical model for the Virgocentric flow as a measure of Ω is shown to be subject to large systematic and random errors. A much better test is to use a local criterion, noting that local peculiar velocity tracks the direction and amplitude of the local peculiar gravitational force extremely well.

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