Dark Sky Simulations: Early Data Release

Abstract

The Dark Sky Simulations are an ongoing series of cosmological N-body simulations designed to provide a quantitative and accessible model of the evolution of the large-scale Universe. Such models are essential for many aspects of the study of dark matter and dark energy, since we lack a sufficiently accurate analytic model of non-linear gravitational clustering. In July 2014, we made available to the general community our early data release, consisting of over 55 Terabytes of simulation data products, including our largest simulation to date, which used $1.07\times 10^{12}(10240^3)$ particles in a volume $8h^{-1}\mathrm{Gpc}$ across. Our simulations were performed with 2HOT, a purely tree-based adaptive N-body method, running on 200,000 processors of the Titan supercomputer, with data analysis enabled by yt. We provide an overview of the derived halo catalogs, mass function, power spectra and light cone data. We show self-consistency in the mass function and mass power spectrum at the 1% level over a range of more than 1000 in particle mass. We also present a novel method to distribute and access very large datasets, based on an abstraction of the World Wide Web (WWW) as a file system, remote memory-mapped file access semantics, and a space-filling curve index. This method has been implemented for our data release, and provides a means to not only query stored results such as halo catalogs, but also to design and deploy new analysis techniques on large distributed datasets.

26 pages, 9 figures, project website at http://darksky.slac.stanford.edu, repository at http://bitbucket.org/darkskysims

References in corpus (6)

• Baryon Acoustic Oscillations in the Lyα forest of BOSS DR11 quasars
• Transients from Initial Conditions in Cosmological Simulations
• Cosmology with Weak Lensing Surveys
• Halo and Galaxy Formation Histories from the Millennium Simulation: Public release of a VO-oriented and SQL-queryable database for studying the evolution of galaxies in the LambdaCDM cosmogony
• Summary of the First Workshop on Sustainable Software for Science: Practice and Experiences (WSSSPE1)
• DEUS Full Observable ΛCDM Universe Simulation: the numerical challenge

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• Galaxy formation with L-GALAXIES: Modelling the environmental dependency of galaxy evolution and comparing with observations
• The scatter, residual correlations and curvature of the SPARC baryonic Tully-Fisher relation
• An Introductory Review on Cosmic Reionization
• Matter Power Spectrum Covariance Matrix from the DEUS-PUR ΛCDM simulations: Mass Resolution and non-Gaussian Errors
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• Characterising cosmic inhomogeneity with anomalous diffusion
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• A Hydro-Particle-Mesh Code for Efficient and Rapid Simulations of the Intracluster Medium