Effects of galaxy collisions on the structure and evolution of galaxy clusters. I - Mass and luminosity functions and background light

Details Effects of galaxy collisions on the structure and evolution of galaxy clusters. I - Mass and luminosity functions and background light Effects of galaxy collisions on the structure and evolution of galaxy clusters. I - Mass and luminosity functions and background light

May 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...268..495m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 268, May 15, 1983, p. 495-512.

Physics

67

Collisions, Galactic Clusters, Galactic Evolution, Galactic Structure, Interacting Galaxies, Luminosity, Mass Distribution, Astronomical Models, Background Radiation, Elliptical Galaxies, Intergalactic Media, Matter (Physics)

Scientific paper

It is pointed out that galaxies in groups and clusters are subjected to a variety of interactions. Thus, direct collisions may result in the merging of two galaxies, and the remnants of such mergers may be elliptical galaxies. Grazing encounters may occur, and galaxies may interact with interacluster gas. It is not yet clear which interactions are important in determining the properties of galaxies and clusters. The present investigation is concerned with the role of one interaction, galaxy collisions, in determining the luminosity and mass functions of galaxies and in creating a diffuse background light. Mergers and the formation of elliptical galaxies are also studied. Direct computer (or N-body) simulations are used to study the role of collisions in rich clusters. It is found that most results depend strongly on the tidal collision cross section. A basic uncertainty encountered is due to a lack of knowledge concerning the internal orbits of matter in galaxies.

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