Physics
Scientific paper
Mar 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...254...16c&link_type=abstract
Astrophysical Journal, Part 1, vol. 254, Mar. 1, 1982, p. 16-21.
Physics
14
Astronomical Models, Cosmology, Galactic Clusters, Galactic Evolution, Galactic Structure, Interacting Galaxies, Angular Momentum, Collisions, Dynamic Characteristics, Elliptical Galaxies, Particle Interactions, Virial Theorem
Scientific paper
When a dynamical simulation of galaxy clusters includes the elasticity of galactic collisions, a massive object forms as a result of galaxy mergers which may contain as much as 80% of the cluster mass. The inelasticity of galaxy encounters, as calibrated in galaxy collision experiments, is sufficiently strong to affect galaxy cluster evolution and is an essential part of the physics of galaxy clusters which must be incorporated into dynamical simulations. It is found that, although the merger framework offers a useful model for the formation of poor clusters with a cD galaxy, it does not fit the rich clusters, thereby raising questions as to how galaxy clusters survive and as to the physics which may account for the differences between clusters with and without cD galaxies. It is suggested that the age of galaxy clusters has been overestimated.
Cooper Robert Glenn
Miller Richard H.
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