Nonlinear evolution of density perturbations

Bagla, J. S. ; Padmanabhan, T. (1995) Nonlinear evolution of density perturbations Journal of Astrophysics and Astronomy, 16 (Suppl). pp. 77-82. ISSN 0250-6335

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From the epoch of recombination (z≈103) till today, the typical density contrasts have grown by a factor of about 106 in a Friedmann universe with Ω = 1. However, during the same epoch the typical gravitational potential has grown only by a factor of order unity. This fact can be exploited to provide a new, powerful, approximation scheme to study the formation of nonlinear structures in the universe by evolving the initial distribution of matter using a gravitational potential frozen in time. We carry out this scheme for several standard models and discuss the results.

Item Type:Article
Source:Copyright of this article belongs to Indian Academy of Sciences.
Keywords:Galaxies; Formation; Large scale structure of Universe
ID Code:72487
Deposited On:29 Nov 2011 05:31
Last Modified:03 Apr 2012 09:34

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