Impact of massive neutrinos on nonlinear matter power spectrum
Jan, 2008Citations per year
Abstract: (arXiv)
We present an approach to describe the nonlinear matter power spectrum for a mixed dark matter (cold dark matter plus neutrinos having total mass of ~0.1eV) model based on cosmological perturbation theory. The suppression of the power spectrum amplitude caused by massive neutrinos is enhanced in the weakly nonlinear regime where standard linear theory ceases to be accurate. Due to this enhanced effect and the gain in the applicable range of the model prediction, the nonlinear model may enable a precision of sigma(m_tot)~0.09eV in constraining the total neutrino mass for the planned galaxy redshift survey, a factor 2.5 improvement compared to the linear regime. The refined model prescription thus offers a vital opportunity to determine the neutrino masses.Note:
- 5 pages, 2 figures
- 14.60.Pq
- 98.80.Es
- 98.65.Dx
- dark matter
- galaxy
- power spectrum: nonlinear
- perturbation theory
- neutrino: mass
- numerical calculations
References(28)
Figures(2)