A possible approach to understand nonlinear gravitational clustering in expanding background

Details A possible approach to understand nonlinear gravitational clustering in expanding background A possible approach to understand nonlinear gravitational clustering in expanding background

2005-11-17

arxiv.org/abs/astro-ph/0511536v2

Astronomy and Astrophysics

Astrophysics

10 pages; two figures; revtex

Scientific paper

A new approach to study the nonlinear phase of gravitational clustering in an expanding universe is explored. This approach is based on an integro-differential equation, for the evolution of the gravitational potential in the Fourier space, which is obtained by using a physically motivated closure condition. I show how this equation allows one to understand several aspects of nonlinear gravitational clustering and provides insight in to the transfer of power from one scale to another through nonlinear mode coupling.

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