High precision spectra at large redshift for dynamical DE cosmologies

TL;DR

This paper explores a relation linking dynamical dark energy models with variable w(z) to constant-w models, validated through N-body and hydro simulations, to facilitate efficient high-precision spectra predictions at large redshift.

Contribution

It introduces and tests a relation that simplifies the modeling of dynamical dark energy cosmologies by connecting them to constant-w models, reducing computational costs.

Findings

The relation holds in N-body simulations for various w(z) models.

The relation is validated in hydrodynamical simulations.

It enables more efficient generation of high-precision spectra for DE studies.

Abstract

The next generation mass probes will investigate DE nature by measuring non-linear power spectra at various z, and comparing them with high precision simulations. Producing a complete set of them, taking into account baryon physics and for any DE state equation w(z), would really be numerically expensive. Regularities reducing such duty are essential. This paper presents further n-body tests of a relation we found, linking models with DE state parameter w(z) to const.-w models, and also tests the relation in hydro simulations.