Large-scale clustering of galaxies with massive dark halos. I - General structure, two-point correlations, and binaries

Details Large-scale clustering of galaxies with massive dark halos. I - General structure, two-point correlations, and binaries Large-scale clustering of galaxies with massive dark halos. I - General structure, two-point correlations, and binaries

Nov 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...310....1e&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 310, Nov. 1, 1986, p. 1-18.

Physics

13

Galactic Clusters, Halos, Intergalactic Media, Matter (Physics), Astronomical Models, Correlation, Dark Matter, Galactic Structure, Many Body Problem, Radial Velocity, Spatial Distribution

Scientific paper

N-body simulations of large-scale clustering of galaxies with massive dark halos are performed and compared to models where galaxies are treated as point masses. Simulations with 800 galaxies in both a flat (Ω = 1.0) and open (Ωf = 0.15) universe are evolved from a Poisson initial density distribution in a periodic comoving cube of final length 63 Mpc. In the dark matter models, two "species" of particles are used, galactic systems are comprised initially of a single "luminous" particle centered in an extended halo of 25 "dark" particles. Ninety percent of the total mass is contained in the halos, which are not "locked" to a given galaxy. The most significant observable effects of dark halos are the lowering of galaxy pair peculiar velocities, particularly on scales r < 500 kpc, the enhancement of small-scale clustering through dynamical friction, and the suppression or delay of clustering on 1 - 5 Mpc scales.

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