English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Resolving faint galaxies in large volumes is critical for accurate cosmicreionisation simulations. While less demanding than hydrodynamical simulations,semi-analytic reionisation models still require very large N-body simulationsin order to resolve the atomic cooling limit across the whole reionisationhistory within box sizes $\gtrsim 100 \, h^{-1} {\rm Mpc}$. To facilitate this,we extend the mass resolution of N-body simulations using a Monte Carloalgorithm. We also propose a method to evolve positions of Monte Carlo halos,which can be an input for semi-analytic reionisation models. To illustrate, wepresent an extended halo catalogue that reaches a mass resolution of$M_\text{halo} = 3.2 \times 10^7 \, h^{-1} \text{M}_\odot$ in a $105 \, h^{-1}{\rm Mpc}$ box, equivalent to an N-body simulation with $\sim 6800^3$particles. The resulting halo mass function agrees with smaller volume N-bodysimulations with higher resolution. Our results also produce consistenttwo-point correlation functions with analytic halo bias predictions. Theextended halo catalogues are applied to the \textsc{meraxes} semi-analyticreionisation model, which improves the predictions on stellar mass functions,star formation rate densities and volume-weighted neutral fractions. Comparisonof high resolution large volume simulations with both small volume or lowresolution simulations confirms that both low resolution and small volumesimulations lead to reionisation ending too rapidly. Lingering discrepanciesbetween the star formation rate functions predicted with and without ourextensions can be traced to the uncertain contribution of satellite galaxies.

An efficient hybrid method to produce high resolution large volume dark matter simulations for semi-analytic models of reionisation