Non-linear Power Spectrum including Massive Neutrinos: the Time-RG Flow Approach

Details Non-linear Power Spectrum including Massive Neutrinos: the Time-RG Flow Approach Non-linear Power Spectrum including Massive Neutrinos: the Time-RG Flow Approach

2009-01-28

arxiv.org/abs/0901.4550v1

JCAP 0906:017,2009

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

8 pages, 11 figures

Scientific paper

10.1088/1475-7516/2009/06/017

Future large scale structure observations are expected to be sensitive to small neutrino masses, of the order of 0.05 eV or more. However, forecasts are based on the assumption that by the time at which these datasets will be available, the non-linear spectrum in presence of neutrino mass will be predicted with an accuracy at least equal to the neutrino mass effect itself, i.e. about 3%. Motivated by these considerations, we present the computation of the non-linear power spectrum of LambdaCDM models in the presence of massive neutrinos using the Renormalization Group time-flow approach, which amounts to a resummation of perturbative corrections to the matter power spectrum to all orders. We compare our results with those obtained with other methods, i.e. linear theory, one-loop perturbation theory and N-body simulations and show that the time-RG method improves the one-loop method in fitting the N-body data, especially in determining the suppression of the matter power spectrum when neutrino are massive with respect to the linear power spectrum.

Affiliated with

Also associated with

No associations

Rating

Non-linear Power Spectrum including Massive Neutrinos: the Time-RG Flow Approach does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Non-linear Power Spectrum including Massive Neutrinos: the Time-RG Flow Approach, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-linear Power Spectrum including Massive Neutrinos: the Time-RG Flow Approach will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-12770