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  1. link.aps.org

    Accurate predictions for the nonlinear matter power spectrum are needed to confront theory with observations in current and near future weak-lensing and galaxy clustering surveys. We propose a computationally cheap method to create an emulator for modified gravity models by utilizing existing emulators for $\mathrm{\ensuremath{\Lambda}}\mathrm{CDM}$.
    Author:Hans Arnold Winther, Hans Arnold Winther, Santiago Casas, Marco Baldi, Marco Baldi, Kazuya Koyama, B...Published:2019
  2. Accurate predictions for the non-linear matter power spectrum are needed to confront theory with observations in current and near future weak lensing and galaxy clustering surveys. We propose a...
    Author:Hans Winther, Santiago Casas, Marco Baldi, Kazuya Koyama, Baojiu Li, Lucas Lombriser, Gong-Bo ZhaoPublished:2019
  3. cosmostat.org

    We propose a computationally cheap method to create an emulator for modified gravity models by utilizing existing emulators for Λ CDM . Using a suite of N -body simulations, we construct a fitting function for the enhancement of both the linear and nonlinear matter power spectrum in the commonly studied Hu-Sawicki f (R ) gravity model valid ...
  4. researchgate.net

    Emulators for the non-linear matter power spectrum beyond Λ CDM Hans Winther, 1 Santiago Casas, 2 Marco Baldi, 3, 4, 5 Kazuya Koyama, 1 Baojiu Li, 6 Lucas Lombriser, 7 and Gong-Bo Zhao 8, 1
  5. Sep 6, 2023The mysterious nature of the dark sector of the Λ-cold-dark-matterCDM) model is one of the main motivators behind the study of alternative cosmological models. ... Here, we present a tool that can be used to create emulators for the non-linear matter power spectrum, and similar global clustering statistics, for models beyond ΛCDM with ...
  6. ui.adsabs.harvard.edu

    Accurate predictions for the nonlinear matter power spectrum are needed to confront theory with observations in current and near future weak-lensing and galaxy clustering surveys. We propose a computationally cheap method to create an emulator for modified gravity models by utilizing existing emulators for Λ CDM . Using a suite of N -body simulations, we construct a fitting function for the ...
  7. model. Our final fit can easily be combined with any emulator or semianalytical models for the nonlinear ΛCDM power spectrum to accurately, and quickly, produce a nonlinear power spectrum for this particular modified gravity model. The method we use can be applied to fairly cheaply construct an emulator for other modified gravity models.
  8. a tool that can be used to create emulators for the non-linear matter power spectrum, and similar global clustering statistics, for models beyond ΛCDM with very little computation effort and without the need for supercomputers. We use fast approximate N-body simulations to emulate the boost, B(k,z) = P beyond−ΛCDM(k,z)/P

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