The quasi-linear nearby Universe

Abstract

The local Universe provides a unique opportunity for testing cosmology and theories of structure formation. To facilitate this opportunity we present a new method for the reconstruction of the quasi-linear matter density and velocity fields from galaxy peculiar velocities and apply it to the Cosmicflows-2 data. The method consists of constructing an ensemble of cosmological simulations, constrained by the standard cosmological model and the observational data. The quasi-linear density field is the geometric mean and variance of the fully non-linear density fields of the simulations. The main nearby clusters (Virgo, Centaurus, Coma), superclusters (Shapley, Perseus-Pisces) and voids (Dipole Repeller) are robustly reconstructed. Galaxies are born biased with respect to the underlying dark matter distribution. Using our quasi-linear framework we demonstrate that the luminosity-weighted density field derived from the 2M++ redshift compilations is non-linearly biased with respect to the matter density field. The bias diminishes in the linear regime.

arXiv commentAccepted for publication in Nature Astronomy. Full article available here https://www.nature.com/articles/s41550-018-0502-4. A version of the arxiv paper including higher resolution versions of the paper images can be obtained from https://edoardocarlesi.github.io/files/CF2_QL_NatAst_arxiv.pdf

References in corpus (47)

• Planck 2013 results. XVI. Cosmological parameters
• The cosmological simulation code GADGET-2
• The Seventh Data Release of the Sloan Digital Sky Survey
• The 6dF Galaxy Survey: Final Redshift Release (DR3) and Southern Large-Scale Structures
• Large-Scale Galaxy Bias
• The 2MASS Redshift Survey - Description and Data Release
• Cosmicflows-2: The Data
• The density and peculiar velocity fields of nearby galaxies
• Cosmicflows-3
• The Laniakea supercluster of galaxies
• Cosmological parameters from the comparison of peculiar velocities with predictions from the 2M++ density field
• Constrained Simulations of the Real Universe: II. Observational Signatures of Intergalactic Gas in the Local Supercluster Region
• The 2M++ galaxy redshift catalogue
• Wiener Reconstruction of The Large Scale Structure
• Local Gravity versus Local Velocity: Solutions for $\beta$ and nonlinear bias
• ELUCID - Exploring the Local Universe with reConstructed Initial Density field I: Hamiltonian Markov Chain Monte Carlo Method with Particle Mesh Dynamics
• Constrained Simulations of the Real Universe: the Local Supercluster
• Wiener Reconstruction of Large-Scale Structure from Peculiar Velocities
• Planes of satellite galaxies and the cosmic web
• Action Dynamics of the Local Supercluster
• Simulating the Formation of the Local Galaxy Population
• Wiener Reconstruction of Galaxy Surveys in Spherical Harmonics
• Unmasking the Masked Universe: the 2M++ catalogue through Bayesian eyes
• The Dipole Repeller
• Infall of nearby galaxies into the Virgo cluster as traced with HST
• ELUCID IV: Galaxy Quenching and its Relation to Halo Mass, Environment, and Assembly Bias
• The alignment of galaxy spin with the shear field in observations
• Reconstructing cosmological initial conditions from galaxy peculiar velocities. I. Reverse Zeldovich Approximation
• Simulations of the Local Universe Constrained by Observational Peculiar Velocities
• Simulating Our Cosmological Neighborhood: Mock Catalogs for Velocity Analysis
• The velocity field of 2MRS Ks=11.75 galaxies: constraints on beta and bulk flow from the luminosity function
• Bayesian 3d velocity field reconstruction with VIRBIuS
• Cosmic Structure and Dynamics of the Local Universe
• Reconstructing the gravitational field of the local universe
• Dark Matter in the Local Universe
• Non-linear Constrained Realizations of the Large Scale Structure
• Mass Determination of Groups of Galaxies: Effects of the Cosmological Constant
• Velocity-Density Correlations from the cosmicflows-3 Distance Catalog and the 2MASS Redshift Survey
• How did the Virgo cluster form?
• Consistent beta values from density-density and velocity-velocity comparisons
• Reconstructing cosmological initial conditions from galaxy peculiar velocities. III. Constrained simulations
• Scale dependence of galaxy biasing investigated by weak gravitational lensing: An assessment using semi-analytic galaxies and simulated lensing data
• Reconstructing cosmological initial conditions from galaxy peculiar velocities. II. The effect of observational errors
• The Local Hubble Flow: Is it a Manifestation of Dark Energy?
• The Arrowhead Mini-Supercluster of Galaxies
• Cosmography and Data Visualization
• Goodness-of-fit analysis of the Cosmicflows-2 database of velocities

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• The Hestia project: simulations of the Local Group
• Cosmicflows-3: Two Distance$-$Velocity Calculators
• The peculiar velocity field up to $z\sim 0.05$ by forward-modeling Cosmicflows-3 data
• Cosmicflows-3: Cosmography of the Local Void
• The Imprint of Large Scale Structure on the Ultra-High-Energy Cosmic Ray Sky
• What can be learnt from UHECR anisotropies observations? Paper I : large-scale anisotropies and composition features
• Cosmic-Ray Anisotropy from Large Scale Structure and the effect of magnetic horizons
• The orientation of planes of dwarf galaxies in the quasi-linear Universe
• Active Galactic Nuclei as potential Sources of Ultra-High Energy Cosmic Rays
• Hamiltonian Monte Carlo reconstruction from peculiar velocities
• From Cosmicflows distance moduli to unbiased distances and peculiar velocities
• Constraints on UHECR sources and extragalactic magnetic fields from directional anisotropies
• A kinematic confirmation of the hidden Vela supercluster
• Reconstructing dark matter distribution with peculiar velocities: Bayesian forward modelling with corrections for inhomogeneous Malmquist bias
• Distinguishing cosmologies using the turn-around radius near galaxy clusters
• Field-Based Physical Inference From Peculiar Velocity Tracers
• What can be learnt from UHECR anisotropies observations Paper II: intermediate-scale anisotropies
• Galaxy flows within 8,000 km/s from Numerical Action methods
• A Local Universe model for constrained simulations
• Testing Bayesian reconstruction methods from peculiar velocities
• The large-scale anisotropy and flux (de-)magnification of ultra-high-energy cosmic rays in the Galactic magnetic field
• Efficiently estimating mean, uncertainty and unconstrained large scale fraction of local Universe simulations with paired fixed fields
• Infall of galaxies onto groups
• Statistically bias-minimized peculiar velocity catalogs from Gibbs point processes and Bayesian inference
• Neutrino anisotropy as a probe of extreme astrophysical accelerators
• Searching for a signature of turnaround in galaxy clusters with convolutional neural networks