# A new approach to cosmological structure formation with massive neutrinos

@article{Fidler2019ANA, title={A new approach to cosmological structure formation with massive neutrinos}, author={Christian Fidler and Alexander Kleinjohann and Thomas Tram and Cornelius Rampf and Kazuya Koyama}, journal={Journal of Cosmology and Astroparticle Physics}, year={2019}, volume={2019}, pages={025 - 025} }

We show how Newtonian cosmological simulations can be employed to investigate the non-linear evolution of two particle species in a relativistic context. We discuss the application for massive neutrinos and other multi-species systems such as Cold Dark Matter (CDM) plus baryons or Warm Dark Matter (WDM) . We propose a method that allows us to perform simulations including massive neutrinos and general relativistic effects at almost the same computational cost as ordinary CDM only N-body…

## 20 Citations

### Suitable initial conditions for Newtonian simulations with massive neutrinos

- PhysicsJournal of Cosmology and Astroparticle Physics
- 2019

Initial conditions for cosmological N-body simulations are usually calculated by rescaling the present day linear power spectrum obtained from an Einstein-Boltzmann solver to the initial time…

### A minimal model for massive neutrinos in Newtonian N-body simulations

- PhysicsJournal of Cosmology and Astroparticle Physics
- 2022

We present a novel method for including the impact of massive neutrinos in cold dark matter N-body simulations. Our approach is compatible with widely employed Newtonian N-body codes and relies on…

### Fast simulations of cosmic large-scale structure with massive neutrinos

- PhysicsJournal of Cosmology and Astroparticle Physics
- 2020

Accurate cosmological simulations that include the effect of non-linear matter clustering as well as of massive neutrinos are essential for measuring the neutrino mass scale from upcoming galaxy…

### Relativistic corrections to the growth of structure in modified gravity

- PhysicsJournal of Cosmology and Astroparticle Physics
- 2021

We present a method to introduce relativistic corrections including linear dark energy perturbations in Horndeski theory into Newtonian simulations based on the N-body gauge approach. We assume that…

### Relativistic bias in neutrino cosmologies

- PhysicsJournal of Cosmology and Astroparticle Physics
- 2019

Halos and galaxies are tracers of the underlying dark matter structures. While their bias is well understood in the case of a simple Universe composed dominantly of dark matter, the relation becomes…

### Neutrinos in N -body simulations

- PhysicsPhysical Review D
- 2021

In the next decade, cosmological surveys will have the statistical power to detect the absolute neutrino mass scale. N-body simulations of large-scale structure formation play a central role in…

### A relativistic interpretation of bias in Newtonian simulations

- PhysicsJournal of Cosmology and Astroparticle Physics
- 2019

Observables of cosmic structures are usually not the underlying matter field but biased tracers of matter, such as galaxies or halos. We show how the bias found in Newtonian N-body simulations can be…

### Geodesic motion and phase-space evolution of massive neutrinos

- Physics
- 2022

. The non-trivial phase-space distribution of relic neutrinos is responsible for the erasure of primordial density perturbations on small scales, which is one of the main cosmological signatures of…

### fRevolution— relativistic cosmological simulations in f(R) gravity. Part I. Methodology

- PhysicsJournal of Cosmology and Astroparticle Physics
- 2019

We present the new relativistic cosmological particle-mesh code fRevolution, based on gevolution [1], aimed at simulating non-linear structure formation in f(R) gravity. We introduce the general…

### General relativistic cosmological N-body simulations. Part I. Time integration

- PhysicsJournal of Cosmology and Astroparticle Physics
- 2019

This is the first in a series of papers devoted to fully general-relativistic N-body simulations applied to late-time cosmology. The purpose of this paper is to present the combination of a numerical…

## References

SHOWING 1-10 OF 43 REFERENCES

### Resolving Cosmic Neutrino Structure: A Hybrid Neutrino N-body Scheme

- Physics
- 2009

We present the first simulation capable of resolving the structure of neutrino clustering on Mpc scales. The method combines grid- and particle-based methods and achieves very good accuracy on both…

### Relativistic N-body simulations with massive neutrinos

- Physics
- 2017

Some of the dark matter in the Universe is made up of massive neutrinos. Their impact on the formation of large scale structure can be used to determine their absolute mass scale from cosmology, but…

### The effect of thermal neutrino motion on the non-linear cosmological matter power spectrum

- Physics
- 2008

We have performed detailed studies of non-linear structure formation in cosmological models with light neutrinos. For the first time the effect of neutrino thermal velocities has been included in a…

### νCONCEPT: cosmological neutrino simulations from the non-linear Boltzmann hierarchy

- PhysicsJournal of Cosmology and Astroparticle Physics
- 2019

In this paper the non-linear effect of massive neutrinos on cosmological structures is studied in a conceptually new way. We have solved the non-linear continuity and Euler equations for the…

### Cosmological N -body simulations including radiation perturbations

- Physics
- 2017

Cosmological $N$-body simulations are the standard tool to study the emergence of the observed large-scale structure of the Universe. Such simulations usually solve for the gravitational dynamics of…

### MassiveNuS: cosmological massive neutrino simulations

- Physics
- 2017

The non-zero mass of neutrinos suppresses the growth of cosmic structure on small scales. Since the level of suppression depends on the sum of the masses of the three active neutrino species, the…

### Reducing noise in cosmological N-body simulations with neutrinos

- PhysicsJournal of Cosmology and Astroparticle Physics
- 2018

We present a new method for generating initial conditions for numerical cosmological simulations in which massive neutrinos are treated as an extra set of N-body (collisionless) particles. It allows…

### The effect of massive neutrinos on the matter power spectrum

- Physics
- 2010

We investigate the impact of massive neutrinos on the distribution of matter in the semi-non-linear regime (0:1 < k < 0:6hMpc 1 ). We present a suite of large-scale N body simulations quantifying the…

### The effect of early radiation in N-body simulations of cosmic structure formation

- Physics
- 2017

Newtonian N-body simulations have been employed successfully over the past decades for the simulation of the cosmological large-scale structure. Such simulations usually ignore radiation…

### gevolution: a cosmological N-body code based on General Relativity

- Physics
- 2016

We present a new N-body code, gevolution, for the evolution of large scale structure in the Universe. Our code is based on a weak field expansion of General Relativity and calculates all six metric…