Evolution of clusters of galaxies

Details Evolution of clusters of galaxies Evolution of clusters of galaxies

Jun 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993pasj...45..289f&link_type=abstract

PASJ: Publications of the Astronomical Society of Japan (ISSN 0004-6264), vol. 45, no. 3, p. 289-302.

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Computation

23

Computational Astrophysics, Galactic Clusters, Galactic Evolution, Many Body Problem, Astronomical Models, Galactic Halos, Mass Distribution, Perturbation Theory

Scientific paper

The evolution of clusters of galaxies was studied using direct N-body simulations in which each galaxy is modeled by many particles. It is found that the positive correlation between the masses and distances of galaxies from the center of a cluster is caused by perturbations due to close encounters with other galaxies and the tidal field of the potential of the parent cluster. The amount of stripped mass is larger for galaxies in the central region than those in outer region, since the interactions are more frequent in the central region. The relation between the mass and the velocity dispersion is found to satisfy the Faber-Jackson relation (1976) which suggests that the Faber-Jackson relation is the result of an evolution of the galaxies driven by external perturbations.

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