Impact of massive neutrinos on nonlinear matter power spectrum

Details Impact of massive neutrinos on nonlinear matter power spectrum Impact of massive neutrinos on nonlinear matter power spectrum

Aug 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aipc.1040...32s&link_type=abstract

KEK COSMOPHYSICS GROUP INAUGURAL CONFERENCE ``ACCELERATORS IN THE UNIVERSE'': Interplay between High Energy Physics and Cosmophy

Physics

High Energy Physics

Background Radiations, Dark Matter, Dark Energy, Neutrino Mass And Mixing, Quantum Cosmology, Spectroscopy And Spectrophotometry, Distances, Redshifts, Radial Velocities, Spatial Distribution Of Galaxies, Star Formation

Scientific paper

We present the first attempt to analytically study the nonlinear matter power spectrum for a mixed dark matter model containing neutrinos of total mass ~0.1 eV, based on cosmological perturbation theory. The suppression in the power spectrum amplitudes due to massive neutrinos is enhanced in the weakly nonlinear regime. We demonstrate that, thanks to this enhanced effect, the use of such a nonlinear model may enable a precision of σ(mν,tot)~0.07 eV in constraining the total neutrino mass for the planned galaxy redshift survey, a factor of two improvement compared to the linear regime.

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