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On the road to percent accuracy III: non-linear reaction of the matter power spectrum to massive neutrinos

Cataneo, M, Emberson, JD, Inman, D, Harnois-Déraps, J and Heymans, C (2019) On the road to percent accuracy III: non-linear reaction of the matter power spectrum to massive neutrinos. Monthly Notices of the Royal Astronomical Society, 491 (3). pp. 3101-3107. ISSN 0035-8711

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Abstract

We analytically model the non-linear effects induced by massive neutrinos on the total matter power spectrum using the halo model reaction framework of Cataneo et al. In this approach, the halo model is used to determine the relative change to the matter power spectrum caused by new physics beyond the concordance cosmology. Using standard fitting functions for the halo abundance and the halo mass–concentration relation, the total matter power spectrum in the presence of massive neutrinos is predicted to per cent-level accuracy, out to k=10hMpc−1⁠. We find that refining the prescriptions for the halo properties using N-body simulations improves the recovered accuracy to better than 1 per cent. This paper serves as another demonstration for how the halo model reaction framework, in combination with a single suite of standard Λ cold dark matter (ΛCDM) simulations, can recover per cent-level accurate predictions for beyond ΛCDM matter power spectra, well into the non-linear regime.

Item Type: Article
Additional Information: This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2019 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Uncontrolled Keywords: 0201 Astronomical and Space Sciences
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Astrophysics Research Institute
Publisher: Oxford University Press (OUP)
Date Deposited: 22 Jul 2020 08:27
Last Modified: 22 Jul 2020 08:30
DOI or Identification number: 10.1093/mnras/stz3189
URI: http://researchonline.ljmu.ac.uk/id/eprint/13332

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