skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: 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 similar to 5 Mpc(-1) and redshift z <= 2. In addition to covering the standard set of Lambda CDM 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 16 medium-resolution simulations and TimeRG perturbation theory results to provide accurate coverage over a wide k-range; the data set generated as part of this project is more than 1.2Pbytes. 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-up results with more than a hundred cosmological models will soon achieve similar to 1% accuracy. We compare our approach with other prediction schemes that are based on halo model ideas and remapping approaches.

Authors:
; ORCiD logo; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Oak Ridge National Laboratory, Oak Ridge Leadership Computing Facility (OLCF); Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science - Office of High Energy Physics
OSTI Identifier:
1415940
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
The Astrophysical Journal (Online)
Additional Journal Information:
Journal Volume: 847; Journal Issue: 1; Journal ID: ISSN 1538-4357
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
dark energy; large-scale structure of universe

Citation Formats

Lawrence, Earl, Heitmann, Katrin, Kwan, Juliana, Upadhye, Amol, Bingham, Derek, Habib, Salman, Higdon, David, Pope, Adrian, Finkel, Hal, and Frontiere, Nicholas. The Mira-Titan Universe. II. Matter Power Spectrum Emulation. United States: N. p., 2017. Web. doi:10.3847/1538-4357/aa86a9.
Lawrence, Earl, Heitmann, Katrin, Kwan, Juliana, Upadhye, Amol, Bingham, Derek, Habib, Salman, Higdon, David, Pope, Adrian, Finkel, Hal, & Frontiere, Nicholas. The Mira-Titan Universe. II. Matter Power Spectrum Emulation. United States. doi:10.3847/1538-4357/aa86a9.
Lawrence, Earl, Heitmann, Katrin, Kwan, Juliana, Upadhye, Amol, Bingham, Derek, Habib, Salman, Higdon, David, Pope, Adrian, Finkel, Hal, and Frontiere, Nicholas. Wed . "The Mira-Titan Universe. II. Matter Power Spectrum Emulation". United States. doi:10.3847/1538-4357/aa86a9.
@article{osti_1415940,
title = {The Mira-Titan Universe. II. Matter Power Spectrum Emulation},
author = {Lawrence, Earl and Heitmann, Katrin and Kwan, Juliana and Upadhye, Amol and Bingham, Derek and Habib, Salman and Higdon, David and Pope, Adrian and Finkel, Hal and Frontiere, Nicholas},
abstractNote = {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 similar to 5 Mpc(-1) and redshift z <= 2. In addition to covering the standard set of Lambda CDM 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 16 medium-resolution simulations and TimeRG perturbation theory results to provide accurate coverage over a wide k-range; the data set generated as part of this project is more than 1.2Pbytes. 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-up results with more than a hundred cosmological models will soon achieve similar to 1% accuracy. We compare our approach with other prediction schemes that are based on halo model ideas and remapping approaches.},
doi = {10.3847/1538-4357/aa86a9},
journal = {The Astrophysical Journal (Online)},
issn = {1538-4357},
number = 1,
volume = 847,
place = {United States},
year = {2017},
month = {9}
}

Works referenced in this record:

pkann – II. A non-linear matter power spectrum interpolator developed using artificial neural networks
journal, February 2014

  • Agarwal, Shankar; Abdalla, Filipe B.; Feldman, Hume A.
  • Monthly Notices of the Royal Astronomical Society, Vol. 439, Issue 2
  • DOI: 10.1093/mnras/stu090

The effect of massive neutrinos on the matter power spectrum: Massive neutrinos and matter power spectrum
journal, October 2010


The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: baryon acoustic oscillations in the Data Releases 10 and 11 Galaxy samples
journal, April 2014

  • Anderson, Lauren; Aubourg, Éric; Bailey, Stephen
  • Monthly Notices of the Royal Astronomical Society, Vol. 441, Issue 1
  • DOI: 10.1093/mnras/stu523

Kinematics of symmetric Galactic longitudes to probe the spiral arms of the Milky Way with Gaia
journal, April 2016


Massive neutrinos and the non-linear matter power spectrum: The matter power with neutrinos
journal, January 2012


The Physics of Cosmic Acceleration
journal, November 2009


Extending the Coyote emulator to dark energy models with standard w 0 - w a parametrization of the equation of state
journal, August 2016

  • Casarini, L.; Bonometto, S. A.; Tessarotto, E.
  • Journal of Cosmology and Astroparticle Physics, Vol. 2016, Issue 08
  • DOI: 10.1088/1475-7516/2016/08/008

Accelerating Universes with Scaling dark Matter
journal, April 2001

  • Chevallier, Michel; Polarski, David
  • International Journal of Modern Physics D, Vol. 10, Issue 02
  • DOI: 10.1142/S0218271801000822

Quintessential scale dependence from separate universe simulations
journal, December 2016


Accounting for baryonic effects in cosmic shear tomography: determining a minimal set of nuisance parameters using PCA
journal, October 2015

  • Eifler, Tim; Krause, Elisabeth; Dodelson, Scott
  • Monthly Notices of the Royal Astronomical Society, Vol. 454, Issue 3
  • DOI: 10.1093/mnras/stv2000

Dark Matter Candidates from Particle Physics and Methods of Detection
journal, August 2010


Power spectra to 1 per cent accuracy between dynamical dark energy cosmologies★: Power spectra to 1 per cent accuracy
journal, August 2007

  • Francis, Matthew J.; Lewis, Geraint F.; Linder, Eric V.
  • Monthly Notices of the Royal Astronomical Society, Vol. 380, Issue 3
  • DOI: 10.1111/j.1365-2966.2007.12139.x

Cosmic calibration: Constraints from the matter power spectrum and the cosmic microwave background
journal, October 2007


HACC: Simulating sky surveys on state-of-the-art supercomputing architectures
journal, January 2016


Separating the Universe into real and fake energy densities
journal, July 2016


Precision reconstruction of the cold dark matter-neutrino relative velocity from N -body simulations
journal, July 2015


Beyond the cosmological standard model
journal, March 2015


3D cosmic shear: cosmology from CFHTLenS
journal, June 2014

  • Kitching, T. D.; Heavens, A. F.; Alsing, J.
  • Monthly Notices of the Royal Astronomical Society, Vol. 442, Issue 2
  • DOI: 10.1093/mnras/stu934

Structure Formation with Cold plus Hot Dark Matter
journal, October 1993

  • Klypin, Anatoly; Holtzman, Jon; Primack, Joel
  • The Astrophysical Journal, Vol. 416
  • DOI: 10.1086/173210

Cosmology from large-scale galaxy clustering and galaxy–galaxy lensing with Dark Energy Survey Science Verification data
journal, October 2016

  • Kwan, J.; Sánchez, C.; Clampitt, J.
  • Monthly Notices of the Royal Astronomical Society, Vol. 464, Issue 4
  • DOI: 10.1093/mnras/stw2464

Exploring the Expansion History of the Universe
journal, March 2003


Cosmic discordance: are Planck CMB and CFHTLenS weak lensing measurements out of tune?
journal, June 2015

  • MacCrann, Niall; Zuntz, Joe; Bridle, Sarah
  • Monthly Notices of the Royal Astronomical Society, Vol. 451, Issue 3
  • DOI: 10.1093/mnras/stv1154

Accurate halo-model matter power spectra with dark energy, massive neutrinos and modified gravitational forces
journal, March 2016

  • Mead, A. J.; Heymans, C.; Lombriser, L.
  • Monthly Notices of the Royal Astronomical Society, Vol. 459, Issue 2
  • DOI: 10.1093/mnras/stw681

An accurate halo model for fitting non-linear cosmological power spectra and baryonic feedback models
journal, October 2015

  • Mead, A. J.; Peacock, J. A.; Heymans, C.
  • Monthly Notices of the Royal Astronomical Society, Vol. 454, Issue 2
  • DOI: 10.1093/mnras/stv2036

Planck 2013 results. XVI. Cosmological parameters
journal, October 2014


Stable clustering, the halo model and non-linear cosmological power spectra
journal, June 2003


Cosmology from cosmic shear with Dark Energy Survey Science Verification data
journal, July 2016


Large-scale structure formation with massive neutrinos and dynamical dark energy
journal, May 2014


Accounting for baryons in cosmological constraints from cosmic shear
journal, February 2013