<scp>AbacusSummit</scp>: a massive set of high-accuracy, high-resolution <i>N</i>-body simulations

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  • Nina A Maksimova
    Center for Astrophysics | Harvard & Smithsonian , 60 Garden Str, Cambridge, MA 02138, USA
  • Lehman H Garrison
    Center for Computational Astrophysics, Flatiron Institute , 162 5th Ave., New York, NY 10010, USA
  • Daniel J Eisenstein
    Center for Astrophysics | Harvard & Smithsonian , 60 Garden Str, Cambridge, MA 02138, USA
  • Boryana Hadzhiyska
    Center for Astrophysics | Harvard & Smithsonian , 60 Garden Str, Cambridge, MA 02138, USA
  • Sownak Bose
    Center for Astrophysics | Harvard & Smithsonian , 60 Garden Str, Cambridge, MA 02138, USA
  • Thomas P Satterthwaite
    Center for Astrophysics | Harvard & Smithsonian , 60 Garden Str, Cambridge, MA 02138, USA

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<jats:title>ABSTRACT</jats:title> <jats:p>We present the public data release of the AbacusSummit cosmological N-body simulation suite, produced with the Abacus N-body code on the Summit supercomputer of the Oak Ridge Leadership Computing Facility. Abacus achieves $\mathcal {O}(10^{-5})$ median fractional force error at superlative speeds, calculating 70M particle updates per second per node at early times, and 45M particle updates per second per node at late times. The simulation suite totals roughly 60 trillion particles, the core of which is a set of 139 simulations with particle mass $2\times 10^{9}\, h^{-1}\, \mathrm{M}_\odot$ in box size $2\, h^{-1}\, \mathrm{Gpc}$. The suite spans 97 cosmological models, including Planck 2018, previous flagship simulation cosmologies, and a linear derivative and cosmic emulator grid. A subsuite of 1883 boxes of size $500\, h^{-1}\, \mathrm{Mpc}$ is available for covariance estimation. AbacusSummit data products span 33 epochs from z = 8 to 0.1 and include light cones, full particle snapshots, halo catalogues, and particle subsets sampled consistently across redshift. AbacusSummit is the largest high-accuracy cosmological N-body data set produced to date.</jats:p>

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