Measurement of the small-scale 3D Lyman-$\alpha$ forest power spectrum

Abstract

Small-scale correlations measured in the Lyman-$\alpha$ (Ly$\alpha$) forest encode information about the intergalactic medium and the primordial matter power spectrum. In this article, we present and implement a simple method to measure the 3-dimensional power spectrum, $P_{3D}$, of the Ly$\alpha$ forest at wavenumbers $k$ corresponding to small, $\sim$ Mpc scales. In order to estimate $P_{3D}$ from sparsely and unevenly distributed data samples, we rely on averaging 1-dimensional Fourier Transforms, as previously carried out to estimate the 1-dimensional power spectrum of the Ly$\alpha$ forest, $P_{1D}$. This methodology exhibits a very low computational cost. We confirm the validity of this approach through its application to Nyx cosmological hydrodynamical simulations. Subsequently, we apply our method to the eBOSS DR16 Ly$\alpha$ forest sample, providing as a proof of principle, a first $P_{3D}$ measurement averaged over two redshift bins $z=2.2$ and $z=2.4$. This work highlights the potential for forthcoming $P_{3D}$ measurements, from upcoming large spectroscopic surveys, to untangle degeneracies in the cosmological interpretation of $P_{1D}$.

arXiv comment28 pages, 9 figures; matches published version

References in corpus (77)

• Planck 2015 results. XIII. Cosmological parameters
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: cosmological analysis of the DR12 galaxy sample
• The 2.5 m Telescope of the Sloan Digital Sky Survey
• The Cosmic Linear Anisotropy Solving System (CLASS) II: Approximation schemes
• SDSS-III: Massive Spectroscopic Surveys of the Distant Universe, the Milky Way Galaxy, and Extra-Solar Planetary Systems
• The Baryon Oscillation Spectroscopic Survey of SDSS-III
• Sloan Digital Sky Survey IV: Mapping the Milky Way, Nearby Galaxies, and the Distant Universe
• The Sixteenth Data Release of the Sloan Digital Sky Surveys: First Release from the APOGEE-2 Southern Survey and Full Release of eBOSS Spectra
• The DESI Experiment Part I: Science,Targeting, and Survey Design
• The Multi-Object, Fiber-Fed Spectrographs for SDSS and the Baryon Oscillation Spectroscopic Survey
• Cosmological parameter analysis including SDSS Ly-alpha forest and galaxy bias: constraints on the primordial spectrum of fluctuations, neutrino mass, and dark energy
• Cosmological Simulations with TreeSPH
• Baryon Acoustic Oscillations in the Lyα forest of BOSS DR11 quasars
• The SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Overview and Early Data
• Warm Dark Matter as a solution to the small scale crisis: new constraints from high redshift Lyman-alpha forest data
• Equation of State of the Photoionized Intergalactic Medium
• Baryon Acoustic Oscillations in the Ly-α forest of BOSS quasars
• New Constraints on the free-streaming of warm dark matter from intermediate and small scale Lyman-$\alpha$ forest data
• The Sloan Digital Sky Survey Quasar Catalog: Sixteenth Data Release
• First constraints on fuzzy dark matter from Lyman-$\alpha$ forest data and hydrodynamical simulations
• The Lyman-alpha Forest in the Cold Dark Matter Model
• The Lyman-alpha Forest Power Spectrum from the Sloan Digital Sky Survey
• Measurement of BAO correlations at $z=2.3$ with SDSS DR12 \lya-Forests
• Recovery of the Power Spectrum of Mass Fluctuations from Observations of the Lyman-alpha Forest
• Probing the Universe with the Lyman-alpha Forest: I. Hydrodynamics of the Low Density IGM
• The Linear Theory Power Spectrum from the Lyman-alpha Forest in the Sloan Digital Sky Survey
• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Baryon acoustic oscillations with Lyman-$\alpha$ forests
• The Physics of the Intergalactic Medium
• The Observed Probability Distribution Function, Power Spectrum, and Correlation Function of the Transmitted Flux in the Lyman-alpha Forest
• The Evolution of the Intergalactic Medium
• Neutrino masses and cosmology with Lyman-alpha forest power spectrum
• Inferring the dark matter power spectrum from the Lyman-alpha forest in high-resolution QSO absorption spectra
• Constraining the mass of light bosonic dark matter using SDSS Lyman-$\alpha$ forest
• Nyx: A Massively Parallel AMR Code for Computational Cosmology
• The Power Spectrum of Mass Fluctuations Measured from the Lyman-alpha Forest at Redshift z=2.5
• Toward a Measurement of the Cosmological Geometry at z~2: Predicting Lyman-alpha Forest Correlation in Three Dimensions, and the Potential of Future Data Sets
• The effect of neutrinos on the matter distribution as probed by the Intergalactic Medium
• The one-dimensional Ly-alpha forest power spectrum from BOSS
• The Lyman-$\alpha$ forest in optically-thin hydrodynamical simulations
• Constraints on neutrino masses from Lyman-alpha forest power spectrum with BOSS and XQ-100
• New Constraints on IGM Thermal Evolution from the Lyα Forest Power Spectrum
• The one-dimensional power spectrum from the SDSS DR14 Ly$\alpha$ forests
• Constraints from Ly-$\alpha$ forests on non-thermal dark matter including resonantly-produced sterile neutrinos
• Physical effects on the Lyman-alpha forest flux power spectrum: damping wings, ionizing radiation fluctuations, and galactic winds
• The power spectrum of the flux distribution in the Lyman-alpha forest of a Large sample of UVES QSO Absorption Spectra (LUQAS)
• Lyman-$\alpha$ forest constraints on Primordial Black Holes as Dark Matter
• Self-Consistent Modeling of Reionization in Cosmological Hydrodynamical Simulations
• Cutoff in the Lyman-$\alpha$ forest power spectrum: warm IGM or warm dark matter?
• The Lyman-alpha forest power spectrum from the XQ-100 Legacy Survey
• The Non-Linear Power Spectrum of the Lyman Alpha Forest
• Probing the Intergalactic Medium with the Lyman alpha forest along multiple lines of sight to distant QSOs
• A Geometrical Test of the Cosmological Energy Contents Using the Lyman-alpha Forest
• Measuring the Cosmological Geometry from the Lyman Alpha Forest along Parallel Lines of Sight
• New limits on light dark matter - proton cross section from the cosmic large-scale structure
• A New Precision Measurement of the Small-Scale Line-of-Sight Power Spectrum of the Ly$\alpha$ Forest
• A New Method to Directly Measure the Jeans Scale of the Intergalactic Medium Using Close Quasar Pairs
• Measurement of the small-scale structure of the intergalactic medium using close quasar pairs
• LyaCoLoRe: Synthetic Datasets for Current and Future Lyman-$\alpha$ Forest BAO Surveys
• The Dark Energy Spectroscopic Instrument: One-dimensional power spectrum from first Lyman-$\alpha$ forest samples with Fast Fourier Transform
• How to estimate the 3D power spectrum of the Lyman-$\alpha$ forest
• Hints of dark matter-neutrino interactions in Lyman-$\alpha$ data
• Optimal 1D Ly$\alpha$ Forest Power Spectrum Estimation -- II. KODIAQ, SQUAD & XQ-100
• The impact of AGN feedback on the 1D power spectra from the Ly$\alpha$ forest using the Horizon-AGN suite of simulations
• The correlation of the Lyman-alpha forest in close pairs and groups of high-redshift quasars: clustering of matter on scales 1-5 Mpc
• Constraints on the cosmic expansion rate at redshift 2.3 from the Lyman-$\alpha$ forest
• Simulating intergalactic gas for DESI-like small scale Lymanα forest observations
• Mock Quasar-Lyman-α Forest Data-sets for the SDSS-III Baryon Oscillation Spectroscopic Survey
• WEAVE-QSO: A Massive Intergalactic Medium Survey for the William Herschel Telescope
• Correlations in the three-dimensional Lyman-alpha forest contaminated by high column density absorbers
• A tomographic map of the large-scale matter distribution using the eBOSS Stripe 82 Ly-$\alpha$ forest
• Large-Scale Correlations in the Lyman-alpha Forest at z = 3-4
• Compressing the cosmological information in one-dimensional correlations of the Lyman-$\alpha$ forest
• Non-linearities in the Lyman-$\alpha$ forest and in its cross-correlation with dark matter halos
• Neutrino mass bounds from confronting an effective model with BOSS Lyman-alpha data
• Modeling the Lyman-$\alpha$ forest with Eulerian and SPH hydrodynamical methods
• The Alcock-Paczyński effect from Lyman-$\alpha$ forest correlations: Analysis validation with synthetic data
• Direct cosmological inference from three-dimensional correlations of the Lyman-$\alpha$ forest

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• The ACCEL2 Project: Precision Measurements of EFT Parameters and BAO Peak Shifts for the Lyman-$\alpha$ Forest
• The Compressed 3D Lyman-Alpha Forest Bispectrum
• ForestFlow: predicting the Lyman-$\alpha$ forest clustering from linear to nonlinear scales
• The Lyman-$\alpha$ Forest from LBGs: First 3D Correlation Measurement with DESI and Prospects for Cosmology
• Unified reconstruction of the Lyman-alpha power spectrum with Hamiltonian Monte Carlo