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

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

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.

Citation

Leo, M., Baugh, C. M., Li, B., & Pascoli, S. (2018). A new smooth-k space filter approach to calculate halo abundances. Journal of Cosmology and Astroparticle Physics, 2018(04), Article 010. https://doi.org/10.1088/1475-7516/2018/04/010

• 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