Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979mnras.188..273b&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 188, July 1979, p. 273-283.
Astronomy and Astrophysics
Astronomy
52
Astronomical Models, Big Bang Cosmology, Galactic Clusters, Prolate Spheroids, Tides, Universe, Angular Momentum, Anisotropy, Ellipticity, Galactic Rotation, Galaxies, Gravitational Collapse, Integral Equations, Mathematical Models, Perturbation Theory
Scientific paper
The study estimates the magnitude of the anisotropy that can be tidally induced in neighboring initially spherical protostructures, be they protogalaxies, protoclusters, or even uncollapsed density enhancements in the large-scale structure of the universe. It is shown that the linear analysis of tidal interactions developed by Peebles (1969) predicts that the anisotropy energy of a perturbation grows to first order in a small dimensionless parameter, whereas the net angular momentum acquired is of second order. A simple model is presented for the growth of anisotropy by tidal interactions during the nonlinear stage of the development of perturbations. A possible observational test is described of the alignment predicted by the model between the orientations of large-scale perturbations and the positions of neighboring density enhancements.
Binney James
Silk Joseph
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