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Title: Cosmological N -body simulations with generic hot dark matter

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 1 eV, 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.

Authors:
;  [1]
  1. Department of Physics and Astronomy, University of Aarhus, Ny Munkegade 120, DK–8000 Aarhus C (Denmark)
Publication Date:
OSTI Identifier:
22667651
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2017; Journal Issue: 10; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COMPUTERIZED SIMULATION; MANY-BODY PROBLEM; MASS; NEUTRINOS; NONLINEAR PROBLEMS; NONLUMINOUS MATTER; SPECTRA; TRANSFORMATIONS

Citation Formats

Brandbyge, Jacob, and Hannestad, Steen, E-mail: jacobb@phys.au.dk, E-mail: sth@phys.au.dk. Cosmological N -body simulations with generic hot dark matter. United States: N. p., 2017. Web. doi:10.1088/1475-7516/2017/10/015.
Brandbyge, Jacob, & Hannestad, Steen, E-mail: jacobb@phys.au.dk, E-mail: sth@phys.au.dk. Cosmological N -body simulations with generic hot dark matter. United States. doi:10.1088/1475-7516/2017/10/015.
Brandbyge, Jacob, and Hannestad, Steen, E-mail: jacobb@phys.au.dk, E-mail: sth@phys.au.dk. Sun . "Cosmological N -body simulations with generic hot dark matter". United States. doi:10.1088/1475-7516/2017/10/015.
@article{osti_22667651,
title = {Cosmological N -body simulations with generic hot dark matter},
author = {Brandbyge, Jacob and Hannestad, Steen, E-mail: jacobb@phys.au.dk, E-mail: sth@phys.au.dk},
abstractNote = {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 1 eV, 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.},
doi = {10.1088/1475-7516/2017/10/015},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 10,
volume = 2017,
place = {United States},
year = {Sun Oct 01 00:00:00 EDT 2017},
month = {Sun Oct 01 00:00:00 EDT 2017}
}