The Mira-Titan Universe II: Matter Power Spectrum Emulation

Abstract

We introduce a new cosmic emulator for the matter power spectrum covering eight cosmological parameters. Targeted at optical surveys, the emulator provides accurate predictions out to a wavenumber k~5/Mpc and redshift z<=2. Besides covering the standard set of LCDM parameters, massive neutrinos and a dynamical dark energy of state are included. The emulator is built on a sample set of 36 cosmological models, carefully chosen to provide accurate predictions over the wide and large parameter space. For each model, we have performed a high-resolution simulation, augmented with sixteen medium-resolution simulations and TimeRG perturbation theory results to provide accurate coverage of a wide k-range; the dataset generated as part of this project is more than 1.2Pbyte. With the current set of simulated models, we achieve an accuracy of approximately 4%. Because the sampling approach used here has established convergence and error-control properties, follow-on results with more than a hundred cosmological models will soon achieve ~1% accuracy. We compare our approach with other prediction schemes that are based on halo model ideas and remapping approaches. The new emulator code is publicly available.

12 pages, 12 figures, emulator code publicly available here: https://github.com/lanl/CosmicEmu

References in corpus (10)

• Dark Matter Candidates from Particle Physics and Methods of Detection
• Beyond the Cosmological Standard Model
• Flowing with Time: a New Approach to Nonlinear Cosmological Perturbations
• The Effect of Thermal Neutrino Motion on the Non-linear Cosmological Matter Power Spectrum
• Cosmic Calibration: Constraints from the Matter Power Spectrum and the Cosmic Microwave Background
• Simulating nonlinear cosmological structure formation with massive neutrinos
• Cosmic Calibration
• Precision reconstruction of the dark matter-neutrino relative velocity from N-body simulations
• Power Spectra to 1% Accuracy between Dynamical Dark Energy Cosmologies
• Quintessential Scale Dependence from Separate Universe Simulations

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