Astronomy and Astrophysics – Astrophysics
Scientific paper
2002-11-18
Astrophys.J. 589 (2003) L61-L64
Astronomy and Astrophysics
Astrophysics
4 pages. Originally submitted to PRL. After a 3.5 month refereeing delay, withdrawn and submitted to ApJL, where it is now in
Scientific paper
10.1086/376351
The large-scale structure of the Universe is thought to evolve by a process of gravitational amplification from low-amplitude Gaussian noise generated in the early Universe. The later, non-linear stages of gravitation-induced clustering produce phase correlations with well-defined statistical properties. In particular, the distribution of phase differences $D$ between neighboring Fourier modes provides useful insights into the clustering phenomenon. Here we develop an approximate theory for the probability distribution $D$ and test it using a large battery of numerical simulations. We find a remarkable universal form for the distribution which is well described by theoretical arguments.
Coles Peter
Melott Adrian
Watts Peter
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