A Multi-Fidelity Emulator for the Lyman-$\alpha$ Forest Flux Power Spectrum

Abstract

In this work we extend our recently developed multi-fidelity emulation technique to the simulated Lyman-$\alpha$ forest flux power spectrum. Multi-fidelity emulation allows interpolation of simulation outputs between cosmological parameters using many cheap low-fidelity simulations and a few expensive high-fidelity simulations. Using a test suite of small box (30 Mpc/h) simulations, we show that multi-fidelity emulation is able to reproduce the Lyman-$\alpha$ forest flux power spectrum well, achieving an average accuracy when compared to a test suite of $0.8\%$. We further show that it has a substantially increased accuracy over single-fidelity emulators, constructed using either the high or low-fidelity simulations only. In particular, it allows the extension of an existing simulation suite to smaller scales and higher redshifts.

arXiv comment12 pages, 10 figures

References in corpus (69)

• The cosmological simulation code GADGET-2
• Cosmological SPH simulations: A hybrid multi-phase model for star formation
• Constraining the Evolution of the Ionizing Background and the Epoch of Reionization with z ~ 6 Quasars II: A Sample of 19 Quasars
• Cosmological parameter analysis including SDSS Ly-alpha forest and galaxy bias: constraints on the primordial spectrum of fluctuations, neutrino mass, and dark energy
• Constraining Warm Dark Matter candidates including sterile neutrinos and light gravitinos with WMAP and the Lyman-alpha forest
• Warm Dark Matter as a solution to the small scale crisis: new constraints from high redshift Lyman-alpha forest data
• Cosmological parameters from combining the Lyman-alpha forest with CMB, galaxy clustering and SN constraints
• New Constraints on the free-streaming of warm dark matter from intermediate and small scale Lyman-$\alpha$ forest data
• The Lyman-alpha Forest Power Spectrum from the Sloan Digital Sky Survey
• Recovery of the Power Spectrum of Mass Fluctuations from Observations of the Lyman-alpha Forest
• The Linear Theory Power Spectrum from the Lyman-alpha Forest in the Sloan Digital Sky Survey
• P3M-SPH simulations of the Lyman-alpha Forest
• The Observed Probability Distribution Function, Power Spectrum, and Correlation Function of the Transmitted Flux in the Lyman-alpha Forest
• Strong bound on canonical ultra-light axion dark matter from the Lyman-alpha forest
• Inferring the dark matter power spectrum from the Lyman-alpha forest in high-resolution QSO absorption spectra
• HeII Reionization and its Effect on the IGM
• The Coyote Universe II: Cosmological Models and Precision Emulation of the Nonlinear Matter Power Spectrum
• The Coyote Universe Extended: Precision Emulation of the Matter Power Spectrum
• A Cosmic UV/X-ray Background Model Update
• Dark Quest. I. Fast and Accurate Emulation of Halo Clustering Statistics and Its Application to Galaxy Clustering
• The BlueTides Simulation: First Galaxies and Reionization
• The Lyman-$\alpha$ forest in optically-thin hydrodynamical simulations
• Cosmological and astrophysical parameters from the SDSS flux power spectrum and hydrodynamical simulations of the Lyman-alpha forest
• Euclid preparation: IX. EuclidEmulator2 -- Power spectrum emulation with massive neutrinos and self-consistent dark energy perturbations
• The one-dimensional power spectrum from the SDSS DR14 Ly$\alpha$ forests
• Possible evidence for an inverted temperature-density relation in the intergalactic medium from the flux distribution of the Lyman-alpha forest
• The properties of satellite galaxies in simulations of galaxy formation
• Revealing reionization with the thermal history of the intergalactic medium: new constraints from the Lyman-$\alpha$ flux power spectrum
• The Mira-Titan Universe II: Matter Power Spectrum Emulation
• The Aemulus Project II: Emulating the Halo Mass Function
• Cosmic Calibration: Constraints from the Matter Power Spectrum and the Cosmic Microwave Background
• Emulating Simulations of Cosmic Dawn for 21cm Power Spectrum Constraints on Cosmology, Reionization, and X-ray Heating
• A consistent and robust measurement of the thermal state of the IGM at $2\le z\le 4$ from a large sample of Ly$\alpha$ forest spectra: Evidence for late and rapid HeII reionization
• A consistent determination of the temperature of the intergalactic medium at redshift z=2.4
• How to constrain warm dark matter with the Lyman $\alpha$ forest
• Cosmic Calibration
• The Lyman-alpha forest and WMAP year three
• The Lyman-alpha forest power spectrum from the XQ-100 Legacy Survey
• Reproducing the Kinematics of Damped Lyman-alpha Systems
• Emulation of baryonic effects on the matter power spectrum and constraints from galaxy cluster data
• Resolving the high redshift Lyman-alpha forest in smoothed particle hydrodynamics simulations
• The impact of feedback from galaxy formation on the Lyman-alpha transmitted flux
• Probing the Intergalactic Medium with the Lyman alpha forest along multiple lines of sight to distant QSOs
• Heating of the Intergalactic Medium by Hydrogen Reionization
• Emulating the Global 21-cm Signal from Cosmic Dawn and Reionization
• New approach for precise computation of Lyman-alpha forest power spectrum with hydrodynamical simulations
• Bayesian emulator optimisation for cosmology: application to the Lyman-alpha forest
• Cosmic Shear Covariance Matrix in $w$CDM: Cosmology Matters
• An Emulator for the Lyman-alpha Forest
• Moving mesh cosmology: properties of neutral hydrogen in absorption
• On the road to percent accuracy II: calibration of the non-linear matter power spectrum for arbitrary cosmologies
• Inferring the IGM thermal history during reionisation with the Lyman-$\alpha$ forest power spectrum at redshift $z\simeq 5$
• GLOBALEMU: A novel and robust approach for emulating the sky-averaged 21-cm signal from the cosmic dawn and epoch of reionisation
• An emulator for the Lyman-$\alpha$ forest in beyond-$\Lambda$CDM cosmologies
• On Estimating the QSO Transmission Power Spectrum
• Imprints of temperature fluctuations on the $z\sim 5$ Lyman-$\alpha$ forest: a view from radiation-hydrodynamic simulations of reionization
• Optimal 1D Ly$\alpha$ Forest Power Spectrum Estimation -- II. KODIAQ, SQUAD & XQ-100
• General framework for cosmological dark matter bounds using $N$-body simulations
• The impact of AGN feedback on the 1D power spectra from the Ly$\alpha$ forest using the Horizon-AGN suite of simulations
• Inferring the Thermal History of the Intergalactic Medium from the Properties of the Hydrogen and Helium Lyman-alpha Forest
• Inhomogeneous HeII reionization in Hydrodynamic Simulations
• Constraining cosmology with weak lensing voids
• Simulating intergalactic gas for DESI-like small scale Lymanα forest observations
• Damped Lyman-alpha Absorbers from Sloan Digital Sky Survey DR16Q with Gaussian processes
• 21cmVAE: A Very Accurate Emulator of the 21-cm Global Signal
• More accurate simulations with separate initial conditions for baryons and dark matter
• Multi-Fidelity Emulation for the Matter Power Spectrum using Gaussian Processes
• Neutrino mass bounds from confronting an effective model with BOSS Lyman-alpha data
• Effect of Separate Initial Conditions on the Lyman-$\alpha$ Forest in Simulations

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• Cosmological Constraints from the eBOSS Lyman-$\alpha$ Forest using the PRIYA Simulations
• A neural network emulator for the Lyman-$\alpha$ 1D flux power spectrum
• Possible evidence for a large-scale enhancement in the Lyman-$\alpha$ forest power spectrum at redshift $\text{z}\ge 4$
• Constraining Mixed Dark Matter models with high redshift Lyman-alpha forest data
• Boosting Line Intensity Map Signal-to-Noise with the Ly-$\alpha$ Forest Cross-Correlation
• ForestFlow: predicting the Lyman-$\alpha$ forest clustering from linear to nonlinear scales
• Neural network emulator to constrain the high-$z$ IGM thermal state from Lyman-$\alpha$ forest flux auto-correlation function