Gravitational clustering of galaxies: Comparison between thermodynamic theory and N-body simulations. III - Velocity distributions for different mass components

Details Gravitational clustering of galaxies: Comparison between thermodynamic theory and N-body simulations. III - Velocity distributions for different mass components Gravitational clustering of galaxies: Comparison between thermodynamic theory and N-body simulations. III - Velocity distributions for different mass components

Feb 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...386....9i&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 386, Feb. 10, 1992, p. 9-18. Research supported by Yamada Science Foundatio

Statistics

Computation

16

Galactic Clusters, Galactic Mass, Gravitational Effects, Many Body Problem, Thermodynamics, Velocity Distribution, Computational Astrophysics, Distribution Functions, Galactic Evolution, Radial Velocity, Galaxies: Clustering, Distances And Redshifts, Gravitation, Large-Scale Structure Of The Universe, Methods: Numerical

Scientific paper

The radial velocity distribution function of galaxies as well as their three-dimensional velocity distributions predicted from the thermodynamic theory are compared with N-body simulations. We mainly consider systems with two mass components. The agreement between the thermodynamic theory and the N-body simulations is remarkably good, even for very large values of the mass ratios. When the mass ratio is large, this agreement is much better than for the spatial distribution functions. The velocity dispersion is found to be an excellent measure of the value of Ω0.

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