# Relativistic second-order initial conditions for simulations of large-scale structure

@inproceedings{Adamek2021RelativisticSI, title={Relativistic second-order initial conditions for simulations of large-scale structure}, author={Julian Adamek and Juan Calles and T. Montandon and Jorge Nore{\~n}a and Cl'ement Stahl}, year={2021} }

Relativistic corrections to the evolution of structure can be used to test general relativity on cosmological scales. They are also a well-known systematic contamination in the search for a primordial non-Gaussian signal. We present a numerical framework to generate RELativistic second-order Initial Conditions (RELIC) based on a generic (not necessarily separable) second-order kernel for the density perturbations. In order to keep the time complexity manageable we introduce a scale cut that…

## References

SHOWING 1-10 OF 57 REFERENCES

Relativistic cosmological large scale structures at one-loop

- PhysicsJournal of Cosmology and Astroparticle Physics
- 2019

The large scale structure bispectrum in the squeezed limit couples large with small scales. Since relativity is important at large scales and non-linear loop corrections are important at small…

General relativistic corrections and non-Gaussianity in large scale structure

- Physics
- 2014

General relativistic cosmology cannot be reduced to linear relativistic perturbations superposed on an isotropic and homogeneous (Friedmann-Robertson-Walker) background, even though such a simple…

Non-Gaussian initial conditions in ΛCDM:Newtonian, relativistic, and primordial contributions

- Physics
- 2014

The goal of the present paper is to set initial conditions for structure formation at nonlinear order, consistent with general relativity, while also allowing for primordial non-Gaussianity. We use…

Large scale structure of the universe and cosmological perturbation theory

- Physics
- 2002

Abstract We review the formalism and applications of non-linear perturbation theory (PT) to understanding the large-scale structure of the Universe. We first discuss the dynamics of gravitational…

N-body simulations with generic non-Gaussian initial conditions II: halo bias

- Physics
- 2011

We present N-body simulations for generic non-Gaussian initial conditions with the aim of exploring and modelling the scale-dependent halo bias. This effect is evident on very large scales requiring…

N-body simulations with generic non-Gaussian initial conditions I: power spectrum and halo mass function

- Physics
- 2010

We address the issue of setting up generic non-Gaussian initial conditions for N-body simulations. We consider inflationary-motivated primordial non-Gaussianity where the perturbations in the Bardeen…

Large-scale bias and efficient generation of initial conditions for nonlocal primordial non-Gaussianity

- Physics
- 2012

We study the scale-dependence of halo bias in generic (non-local) primordial non-Gaussian (PNG) initial conditions of the type motivated by inflation, parametrized by an arbitrary quadratic kernel.…

The Three-Point Correlation Function of the Cosmic Microwave Background in Inflationary Models

- Physics
- 1994

We analyze the temperature three–point correlation function and the skewness of the Cosmic Microwave Background (CMB), providing general relations in terms of multipole coefficients. We then focus on…

Local stochastic non-Gaussianity and N-body simulations

- Physics
- 2010

Large-scale clustering of highly biased tracers of large-scale structure has emerged as one of the best observational probes of primordial non-Gaussianity of the local type (i.e. f{sub NL}{sup…

Single-Field Consistency Relations of Large Scale Structure

- Physics
- 2013

We derive consistency relations for the late universe (CDM and ΛCDM): relations between an n-point function of the density contrast δ and an (n+1)-point function in the limit in which one of the…