# Cosmological N-body simulations with generic hot dark matter

## TL;DR

This paper investigates the non-linear effects of hot dark matter components, including fermions and bosons, in cosmological N-body simulations, revealing how mass influences power spectrum suppression and establishing a fermion-boson mapping in non-linear regimes.

## Contribution

It introduces a method to simulate and compare fermionic and bosonic hot dark matter effects in non-linear cosmological structures.

## Key findings

- Thermal free-streaming causes similar power suppression for sub-eV masses as in neutrinos.
- For masses above 1 eV, non-linear suppression is less than linear predictions.
- Fermionic and bosonic models can be mapped in the non-linear regime through a simple transformation.

## Abstract

We have calculated the non-linear effects of generic fermionic and bosonic hot dark matter components in cosmological N-body simulations. For sub-eV masses, the non-linear power spectrum suppression caused by thermal free-streaming resembles the one seen for massive neutrinos, whereas for masses larger than 1eV, the non-linear relative suppression of power is smaller than in linear theory. We furthermore find that in the non-linear regime, one can map fermionic to bosonic models by performing a simple transformation.