Mathematics – Logic
Scientific paper
Feb 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983mnras.202..561p&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 202, Feb. 1983, p. 561-569. Research supported by the Royal Society of
Mathematics
Logic
8
Cosmology, Elliptical Galaxies, Galactic Clusters, Galactic Evolution, Galactic Structure, Asphericity, Eccentricity, Ellipticity
Scientific paper
The induced ellipticity due to the tidal distension of protostructures co-expanding with the Universe is calculated up to the point of collapse. Whereas this effect may explain the shapes of E galaxies in clusters, and dwarf elliptical galaxies close by giant companions, it is hard to account for the shapes of E galaxies in small groups. The maximum induced ellipticity is found to be independent of mass-scale in an Ω = 1 universe, but to increase with mass-scale in more open cosmologies. A cosmological test is suggested by studying the dynamics of large clusters or superclusters of galaxies.
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