Research area | Astronomy, Space and Earth Sciences |
Title | 3 per cent-accurate predictions for the clustering of dark matter, haloes, and subhaloes, over a wide range of cosmologies and scales |
Publication Type | Journal Article |
Publication year | 2020 |
Authors | Contreras, S, Angulo, RE, Zennaro, M, Arico, G, Pellejero-Ibanez, M |
Journal | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY |
Volume | 499 |
Number | 4 |
Pages | 4905-4917 |
Type of Article | Article |
Keywords | large-scale structure of Universe}, {cosmological parameters |
Abstract | Predicting the spatial distribution of objects as a function of cosmology is an essential ingredient for the exploitation of future galaxy surveys. In this paper, we show that a specially designed suite of gravity-only simulations together with cosmology-rescaling algorithms can provide the clustering of dark matter, haloes, and subhaloes with high precision. Specifically, with only three N-body simulations, we obtain the power spectrum of dark matter at z = 0 and 1 to better than 3 per cent precision for essentially all currently viable values of eight cosmological parameters, including massive neutrinos and dynamical dark energy, and over the whole range of scales explored, 0.03 < k/h(-1) Mpc(-1) < 5. This precision holds at the same level for mass-selected haloes and for subhaloes selected according to their peak maximum circular velocity. As an initial application of these predictions, we successfully constrain Omega(m), sigma(8), and the scatter in subhalo-abundance-matching employing the projected correlation function of mock SDSS galaxies. |
DOI | 10.1093/mnras/staa3117 |