Journal Article

The effect of massive neutrinos on the matter power spectrum

Shankar Agarwal and Hume A. Feldman

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 410, issue 3, pages 1647-1654
Published in print January 2011 | ISSN: 0035-8711
Published online January 2011 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2010.17546.x
The effect of massive neutrinos on the matter power spectrum

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We investigate the impact of massive neutrinos on the distribution of matter in the semi-non-linear regime (0.1 ≲k≲ 0.6 h Mpc−1). We present a suite of large-scale N-body simulations quantifying the scale-dependent suppression of the total matter power spectrum, resulting from the free-streaming of massive neutrinos out of high-density regions. Our simulations show a power suppression of 3.5–90 per cent at k∼ 0.6 h Mpc−1 for total neutrino mass, Σmν= 0.05–1.9 eV, respectively. We also discuss the precision levels that future cosmological data sets would have to achieve in order to distinguish the normal and inverted neutrino mass hierarchies.

Keywords: neutrinos; methods: numerical; large-scale structure of Universe

Journal Article.  6225 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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