Understanding Gravitational Clustering with Non-Linear Perturbation Theory

Details Understanding Gravitational Clustering with Non-Linear Perturbation Theory Understanding Gravitational Clustering with Non-Linear Perturbation Theory

1997-02-21

arxiv.org/abs/astro-ph/9702195v1

Astronomy and Astrophysics

Astrophysics

3 pages with 1 figure, uses sprocl.sty, to appear in the Proceedings of the 18th Texas Symposium on Relativistic Astrophysics,

Scientific paper

I discuss new results concerning the evolution of the bispectrum due to gravitational instability from gaussian initial conditions using one-loop perturbation theory (PT). Particular attention is paid to the transition from weakly non-linear scales to the non-linear regime at small scales. Comparison with numerical simulations is made to assess the regime of validity of the perturbative approach.

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