Distribution of Forces in Gravitationally Clustered Systems

Details Distribution of Forces in Gravitationally Clustered Systems Distribution of Forces in Gravitationally Clustered Systems

1997-05-27

arxiv.org/abs/astro-ph/9705213v1

PASJ (1997) 49, 187-192

Astronomy and Astrophysics

Astrophysics

8 pages, 4 Postscript figures, LaTeX file

Scientific paper

We have studied the distribution of forces in gravitational systems through numerical experiments. Data were taken from an N-body simulation in an expanding universe. Before clustering, the distribution of random forces was represented as a Holtsmark distribution; the nearest-neighbor distribution is also shown as a comparison. The analytical and simulation distributions are in good agreement. When clustering becomes strong, the simulation result showed that the contribution of the forces acting on each galaxy, which is generated from all other galaxies, is almost entirely due to the gravitational attraction of its nearest neighbor. This implies that nearest-neighbor galactic encounters may play the main role in the dynamics of galaxy clustering.

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