Evolution of rich clusters of galaxies

Details Evolution of rich clusters of galaxies Evolution of rich clusters of galaxies

Oct 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...114...41r&link_type=abstract

Astronomy and Astrophysics, vol. 114, no. 1, Oct. 1982, p. 41-52.

Astronomy and Astrophysics

Astrophysics

35

Galactic Clusters, Galactic Evolution, Elliptical Galaxies, Luminosity, Mass Distribution, Mass To Light Ratios, Spiral Galaxies, Velocity Distribution

Scientific paper

In the present numerical simulation of the evolution of a rich cluster of galaxies having a realistic initial distribution of masses, the sizes and masses of the simulation particles are such that they represent halos presumed to be attached to galaxies initially. The upper end of the mass spectrum is most strongly affected by the predominant occurrence of the merging process during the expansion and subsequent collapse of the cluster. It has been proposed that the increase of the ratio of the accreted over the initial mass of galaxies should be interpreted as an evolution of galaxies along the sequence (Sc-Sb-Sa)-SO-E, and the results presented indicate that such a model is consistent with such recent observations as the overall abundance of different morphological types, the local density-morphological type relation, and the mass function of elliptical galaxies.

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