The Abacus Cosmos: A Suite of Cosmological N-body Simulations

TL;DR

This paper introduces a comprehensive set of cosmological N-body simulation data, including halo catalogs across multiple cosmologies and resolutions, designed to facilitate research on structure formation and cosmological parameter dependence.

Contribution

It provides a large, publicly available suite of phase-matched simulations with diverse cosmologies, resolutions, and halo catalogs, enabling detailed studies of cosmological models and structure formation.

Findings

Simulations cover 40 wCDM cosmologies around Planck 2015 parameters.

Data includes halo catalogs from multiple halo finders and redshifts.

Volume and phase-matched simulations reduce sample variance for cosmological analysis.

Abstract

We present a public data release of halo catalogs from a suite of 125 cosmological $N$-body simulations from the Abacus project. The simulations span 40 $w$CDM cosmologies centered on the Planck 2015 cosmology at two mass resolutions, $4\times 10^{10}\;h^{-1}M_\odot$ and $1\times 10^{10}\;h^{-1}M_\odot$, in $1.1\;h^{-1}\mathrm{Gpc}$ and $720\;h^{-1}\mathrm{Mpc}$ boxes, respectively. The boxes are phase-matched to suppress sample variance and isolate cosmology dependence. Additional volume is available via 16 boxes of fixed cosmology and varied phase; a few boxes of single-parameter excursions from Planck 2015 are also provided. Catalogs spanning $z=1.5$ to $0.1$ are available for friends-of-friends and Rockstar halo finders and include particle subsamples. All data products are available at https://lgarrison.github.io/AbacusCosmos