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A new smooth-k space filter approach to calculate halo abundances

Leo, Matteo; Baugh, Carlton M.; Li, Baojiu; Pascoli, Silvia

A new smooth-k space filter approach to calculate halo abundances Thumbnail


Authors

Matteo Leo



Abstract

We propose a new filter, a smooth-k space filter, to use in the Press-Schechter approach to model the dark matter halo mass function which overcomes shortcomings of other filters. We test this against the mass function measured in N-body simulations. We find that the commonly used sharp-k filter fails to reproduce the behaviour of the halo mass function at low masses measured from simulations of models with a sharp truncation in the linear power spectrum. We show that the predictions with our new filter agree with the simulation results over a wider range of halo masses for both damped and undamped power spectra than is the case with the sharp-k and real-space top-hat filters.

Journal Article Type Article
Acceptance Date Mar 23, 2018
Online Publication Date Apr 3, 2018
Publication Date Apr 3, 2018
Deposit Date Apr 19, 2018
Publicly Available Date Apr 3, 2019
Journal Journal of Cosmology and Astroparticle Physics
Publisher IOP Publishing
Peer Reviewed Peer Reviewed
Volume 2018
Issue 04
Article Number 010
DOI https://doi.org/10.1088/1475-7516/2018/04/010
Public URL https://durham-repository.worktribe.com/output/1360800

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Copyright Statement
This is an author-created, un-copyedited version of an article accepted for publication/published in Journal of Cosmology and Astroparticle Physics. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at https://doi.org/10.1088/1475-7516/2018/04/010






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