Neutrinos in non-linear structure formation - the effect on halo properties

J. Brandbyge; Steen Hannestad; Troels Haugbølle; Y.Y. Wong

doi:10.1088/1475-7516/2010/09/014

Neutrinos in non-linear structure formation - the effect on halo properties

J. Brandbyge, Steen Hannestad, Troels Haugbølle, Y.Y. Wong

65 Citationer (Scopus)

Abstract

We use N-body simulations to find the effect of neutrino masses on halo properties, and investigate how the density profiles of both the neutrino and the dark matter components change as a function of the neutrino mass. We compare our neutrino density profiles with results from the N-one-body method and find good agreement. We also show and explain why the Tremaine-Gunn bound for the neutrinos is not saturated. Finally, using N-body simulations we study how the halo mass function changes as a function of the neutrino mass and compare our results with the Sheth-Tormen semi-analytic formulae. Our results are important for surveys which aim at probing cosmological parameters using clusters, as well as future experiments aiming at measuring the cosmic neutrino background directly.

Originalsprog	Engelsk
Tidsskrift	Journal of Cosmology and Astroparticle Physics
Vol/bind	2010
Udgave nummer	9
Sider (fra-til)	014
ISSN	1475-7516
DOI	https://doi.org/10.1088/1475-7516/2010/09/014
Status	Udgivet - 14 sep. 2010

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10.1088/1475-7516/2010/09/014

Citationsformater

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AU - Brandbyge, J.

AU - Hannestad, Steen

AU - Haugbølle, Troels

AU - Wong, Y.Y.

PY - 2010/9/14

Y1 - 2010/9/14

N2 - We use N-body simulations to find the effect of neutrino masses on halo properties, and investigate how the density profiles of both the neutrino and the dark matter components change as a function of the neutrino mass. We compare our neutrino density profiles with results from the N-one-body method and find good agreement. We also show and explain why the Tremaine-Gunn bound for the neutrinos is not saturated. Finally, using N-body simulations we study how the halo mass function changes as a function of the neutrino mass and compare our results with the Sheth-Tormen semi-analytic formulae. Our results are important for surveys which aim at probing cosmological parameters using clusters, as well as future experiments aiming at measuring the cosmic neutrino background directly.

AB - We use N-body simulations to find the effect of neutrino masses on halo properties, and investigate how the density profiles of both the neutrino and the dark matter components change as a function of the neutrino mass. We compare our neutrino density profiles with results from the N-one-body method and find good agreement. We also show and explain why the Tremaine-Gunn bound for the neutrinos is not saturated. Finally, using N-body simulations we study how the halo mass function changes as a function of the neutrino mass and compare our results with the Sheth-Tormen semi-analytic formulae. Our results are important for surveys which aim at probing cosmological parameters using clusters, as well as future experiments aiming at measuring the cosmic neutrino background directly.

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DO - 10.1088/1475-7516/2010/09/014

M3 - Journal article

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SP - 014

JO - Journal of Cosmology and Astroparticle Physics

JF - Journal of Cosmology and Astroparticle Physics

IS - 9

ER -

Neutrinos in non-linear structure formation - the effect on halo properties

Abstract

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