The 2dF Galaxy Redshift Survey: The power spectrum and the matter content of the universe

Abstract

The 2dF Galaxy Redshift Survey has now measured in excess of 160000 galaxy redshifts. This paper presents the power spectrum of the galaxy distribution, calculated using a direct FFT-based technique. We argue that, within the k-space region 0.02<k<0.15 h Mpc^-1, the shape of this spectrum should be close to that of the linear density perturbations convolved with the window function of the survey. This window function and its convolving effect on the power spectrum estimate are analyzed in detail. By convolving model spectra, we are able to fit the power-spectrum data and provide a measure of the matter content of the universe. Our results show that models containing baryon oscillations are mildly preferred over featureless power spectra. Analysis of the data yields 68% confidence limits on the total matter density times the Hubble parameter Ω_m h = 0.20 +/- 0.03, and the baryon fraction Ω_b/Ω_m = 0.15 +/- 0.07, assuming scale-invariant primordial fluctuations.

arXiv comment10 pages, 8 figures, submitted to MNRAS

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• Why Does Gravity Ignore the Vacuum Energy?
• Cross-correlation of galaxies and galaxy clusters in the Sloan Digital Sky Survey and the importance of non-Poissonian shot noise
• Dark energy interacting with two fluids
• Is Dark Energy Dynamical in the DESI Era? A Critical Review
• Inflation from D3-brane motion in the background of D5-branes
• Two 100 Mpc-scale structures in the 3-D distribution of radio galaxies and their implications
• Two-Dimensional Topology of the 2dF Galaxy Redshift Survey
• Running of the Scalar Spectral Index and Observational Signatures of Inflation
• Precision Measurements of Higher-Order Angular Galaxy Correlations Using 11 Million SDSS Galaxies
• Multipole expansion for HI intensity mapping experiments: simulations and modelling
• Weak lensing predictions for coupled dark energy cosmologies at non-linear scales
• Cosmological neutrino bounds for non-cosmologists
• Cosmological constraints on dark energy models using DESI BAO 2024
• Principal Component Analysis of the Cosmic Microwave Background Anisotropies: Revealing The Tensor Degeneracy
• Observational Constraints on Dynamical Dark Energy Models
• A Cyclic Universe With Varying Cosmological Constant in $f(R,T)$ gravity
• Revealing modified gravity signal in matter and halo hierarchical clustering
• Understanding the PSCz Galaxy Power Spectrum with N-body Simulations
• Non-Gaussian errors of baryonic acoustic oscillations
• Structure formation in Multiple Dark Matter cosmologies with long-range scalar interactions
• DBI N-flation
• Features in the primordial power spectrum: constraints from the CMB and the limitation of the 2dF and SDSS redshift surveys to detect them
• Measuring the geometry of the Universe in the presence of isocurvature modes
• General relativistic 'screening' in cosmological simulations
• Constraining the Nature of Dark Energy using the SKA
• Constraints on intergalactic dust from quasar colours
• Detecting the power spectrum turnover with HI intensity mapping
• The SAMI Galaxy Survey: The Low-Redshift Stellar Mass Tully-Fisher Relation
• Does fractal Universe describe a complete cosmic scenario?
• Optical and X-ray clusters as tracers of the supercluster-void network. III Distribution of Abell and APM clusters
• The nature of the relative bias between galaxies of different spectral type in 2dFGRS
• The dark matter halo shape of edge-on disk galaxies - I. HI observations
• Constraining the relative velocity effect using the Baryon Oscillation Spectroscopic Survey
• Probing Dark Energy with Baryonic Acoustic Oscillations at High Redshifts
• Observational constraints on the inflaton potential combined with flow-equations in inflaton space
• Holographic kinetic k-essence model
• Measurement of $H(z)$ and $D_A(z)$ from the two-dimensional power spectrum of Sloan Digital Sky Survey luminous red galaxies
• Evidence for the Fifth Element Astrophysical status of Dark Energy
• Extending the halo mass resolution of $N$-body simulations
• On the future of Gamma-Ray Burst Cosmology
• Pairwise velocities in the Halo Model: Luminosity and Scale Dependence
• The 2MASS galaxy angular power spectrum: Probing the galaxy distribution to Gigaparsec scales
• An Improved Statistical Point-Source Foreground Model for the Epoch of Reionization
• Cosmological Constraints from a Combined Analysis of the Cluster Mass Function and Microwave Background Anisotropies
• Optical and X-ray clusters as tracers of the supercluster-void network. II The spatial correlation function
• Corrected holographic dark energy with power-law entropy and Hubble Horizon cut-off in FRW Universe
• Large scale distribution of total mass versus luminous matter from Baryon Acoustic Oscillations: First search in the SDSS-III BOSS Data Release 10
• Attractor Solution in Coupled Yang-Mills Field Dark Energy Models
• Non-Gaussian Error in Galaxy Survey (Part 1)
• Higher neutrino mass allowed if Cold Dark Matter and Dark Energy are coupled
• Constraining photon-axion oscillations using quasar spectra
• Friedmann Equation for Brans Dicke Cosmology
• A stable flat universe with variable Cosmological constant in f(R,T) Gravity
• How the Nonbaryonic Dark Matter Theory Grew
• Looking for dark matter trails in colliding galaxy clusters
• The Evolution of K* and the Halo Occupation Distribution since z=1.5: Observations vs. Simulations
• The power spectrum of galaxy clustering in the APM survey
• Central Mass Profiles of the Nearby Cool-core Galaxy Clusters Hydra A and A478
• Reconstructing large running-index inflaton potentials
• Direct Detection Rates of Dark Matter Coupled to Dark Energy
• Using the filaments in the LCRS to test the LambdaCDM model
• Markov-chain reconstruction of the 2dF Galaxy Redshift Survey real-space power spectrum
• Mock galaxy redshift catalogues from simulations: implications for Pan-STARRS1
• Constraints on self-interacting Bose-Einstein condensate dark matter using large-scale observables
• Conservative Estimates of the Mass of the Neutrino from Cosmology
• COBE-DMR-Normalized Dark Energy Cosmogony
• Keck spectroscopy of CLASS gravitational lenses
• A brief review on cosmological analysis of galaxy surveys with multiple tracers
• Detecting the Baryons in Matter Power Spectra
• Raytracing simulations of coupled dark energy models
• Dynamical friction in Bose-Einstein condensed self-interacting dark matter at finite temperatures, and the Fornax dwarf spheroidal
• From the production of primordial perturbations to the end of inflation
• Quintessence with a constant equation of state in hyperbolic universes
• Cosmological simulations of self-interacting Bose-Einstein condensate dark matter
• The VIMOS Public Extragalactic Redshift Survey (VIPERS). The matter density and baryon fraction from the galaxy power spectrum at redshift $0.6<z<1.1$
• Validating the Fisher approach for stage IV spectroscopic surveys
• Large-scale structure and matter in the universe
• Observational Tests of FRW World Models
• An extended analysis for a generalized Chaplygin gas model
• Constraining CMB-consistent primordial voids with cluster evolution
• Crossing the phantom divide line in universal extra dimensions
• Q-LET - Quick Lensing Estimation Tool - An application to SN2003es
• Testing Dark Energy with the Advanced Liquid-Mirror Probe of Asteroids, Cosmology and Astrophysics
• Cosmological constraints from the cluster contribution to the power spectrum of the soft X-ray background. New evidence for a low sigma_8
• Interacting entropy-corrected holographic Chaplygin gas model
• Barrow entropic Quintessence and Dilation dark energy Models with Generalized HDE cut-off
• Line confusion in spectroscopic surveys and its possible effects: Shifts in Baryon Acoustic Oscillations position
• The impact and mitigation of broad absorption line quasars in Lyman$-\alpha$ forest correlations
• A stable flat entropy-corrected FRW universe
• Ricci-Gauss-Bonnet holographic dark energy in Chern-Simons modified gravity: A flat FLRW quintessence-dominated universe
• Observational estimates of the initial power spectrum at small scale from Lyman-$\alpha$ absorbers
• On the Angular Correlation Function of SZ Clusters : Extracting cosmological information from a 2D catalog
• An effective theory of accelerated expansion
• Simulated evolution of the dark matter large-scale structure
• Satellites in the field and lens galaxies: SDSS/COSMOS vs. SLACS/CLASS
• Degeneracy of consistency equations in braneworld inflation
• Inverse-Scattering Theory and the Density Perturbations from Inflation
• Simulations of structure formation in interacting dark energy cosmologies
• The Angular-Diameter-Distance-Maximum and Its Redshift as Constraints on $\Lambda \ne 0$ FLRW Models
• Optimal Weights For Measuring Redshift Space Distortions in Multi-tracer Galaxy Catalogues
• Nontrivial Geometries: Bounds on the Curvature of the Universe
• DM particles: how warm they can be?
• Uneven flows: On cosmic bulk flows, local observers, and gravity
• Detecting dark matter-dark energy coupling with the halo mass function
• Wide Field Surveys and Astronomical Discovery Space
• Cosmological determination to the values of the prefactors in the logarithmic corrected entropy-area relation
• HI intensity mapping correlation function from UNIT simulations: BAO and observationally induced anisotropy
• The effective Lagrangian of dark energy from observations
• Evolution of shifted cosmological parameter and shifted dust matter in a two-phase tachyonic field universe
• Holographic dilatonic model of dark energy
• Simulating the formation of cosmic structure
• CSST Large-scale Structure Analysis Pipeline: II. the CSST Emulator for Slitless Spectroscopy (CESS)
• Real space tomography of the primordial Universe with cluster polarization
• Decaying dark energy in light of the latest cosmological dataset
• The current status of observational cosmology
• Discrete Spectrum of Inflationary Fluctuations
• Deep learning insights into cosmological structure formation
• Approximate Consistency Condition from Running Spectral Index in Slow-Roll Inflationary Models
• The supercluster-void network V. Alternative evidence for its regularity
• Time-dependent diffusive interactions between dark matter and dark energy in the context of $k-$essence cosmology
• Interacting holographic tachyon model of dark energy
• Structure and evolution of Zel'dovich pancakes as probes of dark energy models
• The biasing phenomenon
• Evolution of magnetic component in Yang-Mills condensate dark energy models
• Discord in Concordance Cosmology and Anomalously Massive Early Galaxies
• The 2dF Galaxy Redshift Survey as a Cosmological Laboratory
• Statistical characteristics of observed Ly-$\alpha$ forest and the shape of linear power spectrum
• Quintessence models with an oscillating equation of state and their potentials
• The cluster-galaxy cross-spectrum: an additional probe of cosmological and halo parameters
• Interacting warm dark matter
• Szekeres models: a covariant approach
• Large scale distribution of mass versus light from Baryon Acoustic Oscillations: Measurement in the final SDSS-III BOSS Data Release 12
• Generalized Model of Interacting Dark Energy and Dark Matter : Phase Portrait Analysis of Evolving Universe
• Window function convolution with deep neural network models
• Statistical characteristics of observed Ly-$\alpha$ forest and the shape of initial power spectrum
• A study on the Clustering Properties of Radio-Selected sources in the Lockman Hole Region at 325 MHz
• Cosmological surveys with multi-object spectrographs
• Modelling ultra-fine structure in dark matter halos
• The Origin of the Large-Scale Structure in the Universe: Theoretical and Statistical Aspects
• A new test of gravity -- I: Introduction to the method
• Unveiling the Universe with Emerging Cosmological Probes
• Prospects and Limitations for Constraining Light Relics with Primordial Abundance Measurements
• `Hyper Parameters' Approach to Joint Estimation: Applications to Cepheid-Calibrated Distances and X-Ray Clusters
• Measuring the cosmological density perturbation
• Optimizing the yield of Sunyaev-Zel'dovich cluster surveys
• Understanding selection effects in observed samples of cataclysmic variables
• Complementary Cosmological Simulations
• Inflation after WMAP3
• Beyond the Standard Model of Physics with Astronomical Observations
• A study of different horizons in inhomogeneous LTB cosmological model
• The evolution of Luminous Red Galaxies in the Sloan Digital Sky Survey 7th data release
• Can tides explain the low dark matter density in Fornax?
• Statistically significant length scale of filaments as a robust measure of galaxy distribution
• All-sky angular power spectra from cleaned WISE$\times$SuperCOSMOS galaxy number counts
• Baryon acoustic oscillations from HI intensity mapping: the importance of cross-correlations in the monopole and quadrupole
• The Effects of Relativistic Corrections on Cosmological Parameter Estimations from SZE Cluster Surveys
• Troubles for observing the inflaton potential
• Forecasting cosmological parameter constraints using multiple sparsity measurements as tracers of the mass profiles of dark matter haloes
• Infrared (in)sensitivity of relativistic effects in cosmological observable statistics
• Conditions for the Absence of Infrared Sensitivity in Cosmological Probes in Any Gravity Theories
• Status and Perspectives of Neutrino Physics
• Constraining Ultra Light Dark Matter with the Galactic Nuclear Star Cluster
• Note on Dark Energy and Cosmic Transit in a scale-invariance cosmology
• The effect of supersymmetry breaking in the Mass Varying Neutrinos
• Bayesian large-scale structure inference and cosmic web analysis
• False Vacuum in the Supersymmetric Mass Varying Neutrinos Model
• Light Sterile Neutrinos in the Supersymmetric U(1)' Models and Axion Models
• The natural science of cosmology
• On a class of scaling FRW cosmological models
• Angular Correlation Function from sample covariance with BOSS and eBOSS LRG
• Prospects for cosmological research with the FAST array: 21-cm intensity mapping survey observation strategies
• Globular clusters as cosmic clocks: new cosmological hints from their integrated light
• Spectroscopic detection of quasars in the 2dF Galaxy Redshift Survey
• The Horizon Order Parameter
• Study of thermal stability for different dark energy models
• Phenomenological power spectrum models for H$\alpha$ emission line galaxies from the Nancy Grace Roman Space Telescope
• Damping of inhomogeneities in neutralino dark matter
• Cosmological constraints from galaxy clustering
• The Cosmic Microwave Background anisotropies: open problems
• Cosmology with Galaxy Correlations
• Constraints on the Sum of Neutrino Masses from Cosmology and their impact on world neutrino data
• A Physical Bias in Cosmological Simulations
• Phenomenological aspects of dark energy dominated cosmologies
• A non-singular closed bouncing universe without violation of null energy condition
• Weighing Neutrinos with Large-Scale Structure
• New $H(z)$ measurement at Redshift = 0.12 with DESI Data Release 1
• Scalar field dark energy and Cosmic Microwave Background
• The possibility of a stable flat dark energy-dominated Swiss-cheese Brane-world universe with a deceleration-acceleration transition
• Testing the CMB Data for Systematic Effects
• Effects of Smoothing Functions in Cosmological Counts-in-Cells Analysis
• Largest scales from the largest galaxy surveys: the pseudo Karhunen-Loève method
• Challenges to the cosmological constant model following results from the Dark Energy Survey
• Cosmic Microwave Background anisotropies: the power spectrum and beyond
• Angular Power Spectrum in Modular Invariant Inflation Model
• Scale-free power spectrums in the delayed cosmology
• Analysis of Cosmological Generalized Reduced Void Probability Functions Constrained by Observations and Numerical Simulations
• Accelerating BAO Scale Fitting Using Taylor Series
• Cosmological and astrophysical applications of modified theories of gravity
• Can hyperbolic phase of Brans-Dicke field account for Dark Matter?
• Dark Matter in the Cosmos- Exploiting the Signatures of its Interaction with Nuclei
• Self-restriction of Gravitational Field and its Role in the Universe
• Unifying the Dark Sector with the New Generalized Chaplygin Gas: Observational Constraints
• Model-agnostic interpretation of 10 billion years of cosmic evolution traced by BOSS and eBOSS data
• An empirical nonlinear power spectrum overdensity-response
• HINORA, a method for detecting ring-like structures in 3D point distributions I: application to the Local Volume Galaxy catalogue
• The Cosmic Microwave Background
• A new topological perspective of expanding space-times with applications to cosmology
• Dark 2002 and Beyond
• Recent Advances in Large-Scale Structure and Galaxy Formation Studies
• Reconstructing the shape of the correlation function
• Viaggiu holographic dark energy in light of DESI DR2
• Revisiting the equation of state of dark energy from DESI BAO with SNe Ia and CMB
• The Lambert $W$ equation of state in light of DESI BAO
• Mixed constraints to inflationary models
• Early Quintessence and the CMB
• Non-Standard Structure Formation Scenarios
• Testing Large-Scale Structure Measurements Against Fisher Matrix Predictions