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The Effect of Thermal Neutrino Motion on the Non-linear Cosmological Matter Power Spectrum

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dc.creator Brandbyge, Jacob
dc.creator Hannestad, Steen
dc.creator Haugboelle, Troels
dc.creator Thomsen, Bjarne
dc.date 2008-07-06T19:38:38Z
dc.date 2008-07-06T19:38:38Z
dc.date 2008-02-26
dc.date.accessioned 2017-01-31T02:40:45Z
dc.date.available 2017-01-31T02:40:45Z
dc.identifier arXiv:0802.3700v1 [astro-ph]
dc.identifier http://hdl.handle.net/10261/5595
dc.identifier.uri http://dspace.mediu.edu.my:8181/xmlui/handle/10261/5595
dc.description 16 pages, 7 figures.-- Submitted to JCAP.-- PACS numbers: 98.65.Dx, 95.35.+d, 14.60.Pq.
dc.description 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 consistent way, and the effect on the matter power spectrum is found to be significant. The effect is large enough to be measured in future, high precision surveys. Additionally, we provide a simple but accurate analytic expression for the suppression of fluctuation power due to massive neutrinos. Finally, we describe a simple and fast method for including the effect of massive neutrinos in large-scale N-body simulations which is accurate at the 1% level for Σ m_nu < 0.15 eV.
dc.description We acknowledge computing resources from the Danish Center for Scientific Computing (DCSC).
dc.description Peer reviewed
dc.format 560029 bytes
dc.format application/pdf
dc.language eng
dc.relation IFT-UAM/CSIC-08-11
dc.relation Preprint
dc.rights openAccess
dc.subject Astrophysics
dc.title The Effect of Thermal Neutrino Motion on the Non-linear Cosmological Matter Power Spectrum
dc.type Pre-print

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