Matter power spectrum in f(R) gravity with massive neutrinos

Details Matter power spectrum in f(R) gravity with massive neutrinos Matter power spectrum in f(R) gravity with massive neutrinos

2010-05-07

arxiv.org/abs/1005.1171v2

Prog. Theor. Phys. 124 (2010), 541-546

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

8 pages, 6 figures; Discussion expanded, references added, results unchanged, matches the version to be published in PTP

Scientific paper

10.1143/PTP.124.541

The effect of massive neutrinos on matter power spectrum is discussed in the context of $f(R)$ gravity. It is shown that the anomalous growth of density fluctuations on small scales due to the scalaron force can be compensated by free streaming of neutrinos. As a result, models which predict observable deviation of the equation-of-state parameter $w_\DE$ from $w_\DE=-1$ can be reconciled with observations of matter clustering if the total neutrino mass is $O(0.5 \eV)$.

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