| Issue |
Europhys. Lett.
Volume 57, Number 3, February 2002
|
|
|---|---|---|
| Page(s) | 315 - 321 | |
| Section | General | |
| DOI | https://doi.org/10.1209/epl/i2002-00462-x | |
| Published online | 01 September 2002 | |
Clustering in gravitating N-body systems
1
Dipartimento di Fisica, Università di Roma “La Sapienza” - Italy
2
INFM, Unità di Ricerca di Roma “La Sapienza” - Italy
Received:
3
September
2001
Accepted:
6
November
2001
We study gravitational clustering of mass points in three dimensions with random initial positions and periodic boundary conditions (no expansion) by numerical simulations. Correlation properties are well-defined in the system and a sort of thermodynamic limit can be defined for the transient regime of clustering. Structure formation proceeds along two paths: i) fluid-like evolution of density perturbations at large scales and ii) shift of the granular (non-fluid) properties from small to large scales. The latter mechanism finally dominates at all scales and it is responsible for the self-similar characteristics of the clustering.
PACS: 05.20.-y – Classical statistical mechanics / 45.50.Jf – Few- and many-body systems / 45.50.-j – Dynamics and kinematics of a particle and a system of particles
© EDP Sciences, 2002
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