Testing Tree-Level Perturbation Theory for Large-Scale Structure with the Local Lagrangian Approximation

Details Testing Tree-Level Perturbation Theory for Large-Scale Structure with the Local Lagrangian Approximation Testing Tree-Level Perturbation Theory for Large-Scale Structure with the Local Lagrangian Approximation

1996-11-20

arxiv.org/abs/astro-ph/9611168v1

Mon.Not.Roy.Astron.Soc. 290 (1997) 367-370

Astronomy and Astrophysics

Astrophysics

10 pages, latex, 2 figures

Scientific paper

We test tree-level perturbation theory for Gaussian initial conditions with power spectra $P(k)\propto k^n$ by comparing the probability distribution function (PDF) for the density predicted by the Local Lagrangian Approximation (LLA) with the results of numerical gravitational clustering simulations. Our results indicate that our approximation correctly reproduces the evolved density PDF for $-3 \leq n \leq-1$ power spectra up to the weakly nonlinear regime, while it shows marginal agreement for power indices n=0 and +1 in the linear regime and poor agreement beyond this point. This suggests that tree-level perturbation theory (as realized in the Local Lagrangian Approximation) can accurately predict the density distribution function for $-3 \leq n \leq -1$ but fails for $n \ge 0$.

Affiliated with

Also associated with

No associations

Rating

Testing Tree-Level Perturbation Theory for Large-Scale Structure with the Local Lagrangian Approximation 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 Testing Tree-Level Perturbation Theory for Large-Scale Structure with the Local Lagrangian Approximation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Testing Tree-Level Perturbation Theory for Large-Scale Structure with the Local Lagrangian Approximation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-313305