Astronomy and Astrophysics – Astrophysics
Scientific paper
1995-08-26
Mon.Not.Roy.Astron.Soc. 278 (1996) L29
Astronomy and Astrophysics
Astrophysics
LaTeX, 4 pages, 1 figure enclosed as a uuencoded postscript file, uses MN.sty and epsf.sty
Scientific paper
The gravitational clustering of collisionless particles in an expanding universe is modelled using some simple physical ideas. I show that it is indeed possible to understand the nonlinear clustering in terms of three well defined regimes: (1) linear regime (2) quasilinear regime which is dominated by scale-invariant radial infall and (3) nonlinear regime dominated by nonradial motions and mergers. Modelling each of these regimes separately I show how the nonlinear two point correlation function can be related to the linear correlation function in heirarchical models. This analysis leads to results which are in good agreement with numerical simulations thereby providing an explanation for numerical results. The ideas presented here will also serve as a powerful anlytical tool to investigate nonlinear clustering in different models. Several implications of the result are discussed.
No associations
LandOfFree
Modelling the Nonlinear Gravitational Clustering in the Expanding Universe does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Modelling the Nonlinear Gravitational Clustering in the Expanding Universe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Modelling the Nonlinear Gravitational Clustering in the Expanding Universe will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-175889