2023
DOI: 10.1088/1475-7516/2023/12/045
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Fast production of cosmological emulators in modified gravity: the matter power spectrum

Bartolomeo Fiorini,
Kazuya Koyama,
Tessa Baker

Abstract: We test the convergence of fast simulations based on the COmoving Lagrangian Acceleration (COLA) method for predictions of the matter power spectrum, specialising our analysis in the redshift range 1 ≤ z ≤ 1.65, relevant to high-redshift spectroscopic galaxy surveys. We then focus on the enhancement of the matter power spectrum in modified gravity (MG), the boost factor, using the Dvali-Gabadadze-Porrati (DGP) theory as a test case but developing a general approach that can be applied to other MG theories. Aft… Show more

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Cited by 9 publications
(1 citation statement)
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“…To meet this requirement, emulators have been introduced (Habib et al 2007) to provide direct predictions from parameter space without necessitating N-body simulations. Over the years, various emulators have been developed to forecast matter power spectra for diverse models, including PkANN (Agarwal et al 2014), EuclidEmulator (Euclid Collaboration et al 2019, FORGE (Arnold et al 2022), and E-MANTIS (Sáez-Casares et al 2024) for f (R) gravity, as well as nDGPemu (Fiorini et al 2023) for DGP gravity.…”
Section: Introductionmentioning
confidence: 99%
“…To meet this requirement, emulators have been introduced (Habib et al 2007) to provide direct predictions from parameter space without necessitating N-body simulations. Over the years, various emulators have been developed to forecast matter power spectra for diverse models, including PkANN (Agarwal et al 2014), EuclidEmulator (Euclid Collaboration et al 2019, FORGE (Arnold et al 2022), and E-MANTIS (Sáez-Casares et al 2024) for f (R) gravity, as well as nDGPemu (Fiorini et al 2023) for DGP gravity.…”
Section: Introductionmentioning
confidence: 99%