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.

Leo M, Baugh CM, Li BJ, Pascoli S (2018). A new smooth-k space filter approach to calculate halo abundances. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 04, 1-16 [10.1088/1475-7516/2018/04/010].

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

Pascoli S
2018

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.
2018
Leo M, Baugh CM, Li BJ, Pascoli S (2018). A new smooth-k space filter approach to calculate halo abundances. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 04, 1-16 [10.1088/1475-7516/2018/04/010].
Leo M; Baugh CM; Li BJ; Pascoli S
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/805971
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