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Tidal interactions in the expanding universe - The formation of prolate systemsThe 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.
Document ID
19790057663
Document Type
Reprint (Version printed in journal)
Authors
Binney, J. (Oxford University Oxford, United Kingdom)
Silk, J. (California, University Berkeley, Calif., United States)
Date Acquired
August 9, 2013
Publication Date
July 1, 1979
Publication Information
Publication: Royal Astronomical Society
Subject Category
ASTROPHYSICS
Funding Number(s)
CONTRACT_GRANT: NGR-05-003-578
Distribution Limits
Public
Copyright
Other