The abundance of dark matter haloes down to Earth mass

作     者：Zheng, Haonan Bose, Sownak Frenk, Carlos S. Gao, Liang Jenkins, Adrian Liao, Shihong Wang, Jie Liu, Yizhou 

作者机构：Key Laboratory for Computational Astrophysics National Astronomical Observatories Chinese Academy of Sciences Beijing100101 China School of Astronomy and Space Science University of Chinese Academy of Sciences Beijing100049 China Institute for Computational Cosmology Department of Physics University of Durham South Road DurhamDH1 3LE United Kingdom Institute for Frontiers in Astronomy and Astrophysics Beijing Normal University Beijing102206 China School of Physics and Microelectronics Zhengzhou University Zhengzhou450001 China 

出 版 物：《arXiv》 (arXiv)

年 卷 期：2023年

核心收录：

主　　题：Presses (machine tools) 

摘      要：We use the Voids-within-Voids-within-Voids (VVV) simulations, a suite of successive nested N-body simulations with extremely high resolution (denoted, from low to high resolution, by L0 to L7), to test the Press-Schechter (PS), Sheth-Tormen (ST), and extended Press-Schechter (EPS) formulae for the halo abundance over the entire mass range, from mini-haloes of 10−6 M, to cluster haloes of 1015 M, at different redshifts, from = 30 to the present. We find that at = 0 and = 2, ST best reproduces the results of L0, which has the mean cosmic density (overdensity = 0), at 1011−15 M. The higher resolution levels (L1-L7) are biased underdense regions ( −6−12.5 M. At ∼ 7 − 15, the ST predictions for L0 and the EPS for L1-L7 show somewhat larger deviations from the simulation results. However, at even higher redshifts, ∼ 30, EPS fits the simulations well again. We confirm our results by picking more subvolumes from the L0 simulation, finding that our conclusions depend only weakly on the size and overdensity of the region. The good agreement of EPS with the higher-level simulations implies that PS (or ST) gives an accurate description of the total halo mass function in representative regions of the universe. © 2023, CC BY.