The New Worlds Simulations: Large-scale Simulations across Three Cosmologies

TL;DR

This paper introduces the New Worlds Simulations, three large-scale cosmological simulations exploring different models, providing detailed statistical measurements and making some data publicly available for further research.

Contribution

The paper presents three high-resolution, large-volume cosmological simulations across different models, enabling detailed comparison and analysis of cosmological parameters.

Findings

Differences in matter power spectra across cosmologies.

Variation in halo mass functions with cosmological models.

High-resolution simulations suitable for synthetic sky generation.

Abstract

In this paper we describe the set of ``New Worlds Simulations'', three very large cosmology simulations, Qo'noS, Vulcan, and Ferenginar, that were carried out on the Summit supercomputer with the Hardware/Hybrid Cosmology Code, HACC. The gravity-only simulations follow the evolution of structure in the Universe by each employing 12,288^3 particles in (3 Gpc/h)^3 volumes, leading to a mass resolution of m_p~10^9 Msun/h. The simulations cover three different cosmologies, one LambdaCDM model, consistent with measurements from Planck, one simulation with massive neutrinos, and one simulation with a varying dark energy equation of state. All simulations have the same phases to allow a detailed comparison of the results and the investigation of the impact of different cosmological parameters. We present measurements of some basic statistics, such as matter power spectra, correlation function, halo mass function and concentration-mass relation and investigate the differences due to the varying cosmologies. Given the large volume and high resolution, these simulations provide excellent bases for creating synthetic skies. A subset of the data is made publicly available as part of this paper.