How does the grouping scheme affect the Wiener Filter reconstruction of the local Universe?

Abstract

High quality reconstructions of the three dimensional velocity and density fields of the local Universe are essential to study the local Large Scale Structure. In this paper, the Wiener Filter reconstruction technique is applied to galaxy radial peculiar velocity catalogs to understand how the Hubble constant (H0) value and the grouping scheme affect the reconstructions. While H0 is used to derive radial peculiar velocities from galaxy distance measurements and total velocities, the grouping scheme serves the purpose of removing non linear motions. Two different grouping schemes (based on the literature and a systematic algorithm) as well as five H0 values ranging from 72 to 76 km/s/Mpc are selected. The Wiener Filter is applied to the resulting catalogs. Whatever grouping scheme is used, the larger H0 is, the larger the infall onto the local Volume is. However, this conclusion has to be strongly mitigated: a bias minimization scheme applied to the catalogs after grouping suppresses this effect. At fixed H0, reconstructions obtained with catalogs grouped with the different schemes exhibit structures at the proper location in both cases but the latter are more contrasted in the less aggressive scheme case: having more constraints permits an infall from both sides onto the structures to reinforce their overdensity. Such findings highlight the importance of a balance between grouping to suppress non linear motions and preserving constraints to produce an infall onto structures expected to be large overdensities. Such an observation is promising to perform constrained simulations of the local Universe including its massive clusters.

arXiv commentAccepted for publication in MNRAS, 10 pages, 6 figures, 3 tables

References in corpus (46)

• Planck 2013 results. XVI. Cosmological parameters
• Final Results from the Hubble Space Telescope Key Project to Measure the Hubble Constant
• A 2.4% Determination of the Local Value of the Hubble Constant
• The SBF Survey of Galaxy Distances. IV. SBF Magnitudes, Colors, and Distances
• Improved Distances to Type Ia Supernovae with Multicolor Light Curve Shapes: MLCS2k2
• Cosmicflows-2: The Data
• The density and peculiar velocity fields of nearby galaxies
• Cosmicflows-3
• Galaxy groups in the 2dFGRS: the group-finding algorithm and the 2PIGG catalogue
• Our Peculiar Motion Away from the Local Void
• Homogeneous Velocity-Distance Data for Peculiar Velocity Analysis. III. The Mark III Catalog of Galaxy Peculiar Velocities
• Groups of Galaxies in the Two Micron All-Sky Redshift Survey
• The 2M++ galaxy redshift catalogue
• Flux- and volume-limited groups/clusters for the SDSS galaxies: catalogues and mass estimation
• Wiener Reconstruction of The Large Scale Structure
• Dynamics of Cosmic Flows
• Galaxy groups and clouds in the Local (z~0.01) universe
• Evidence for a ~300 Mpc Scale Under-density in the Local Galaxy Distribution
• The growth rate of cosmic structure from peculiar velocities at low and high redshifts
• Galaxy Groups: A 2MASS Catalog
• The UZC-SSRS2 Group Catalog
• Wiener Reconstruction of Large-Scale Structure from Peculiar Velocities
• The peculiar motions of early-type galaxies in two distant regions - VII. Peculiar velocities and bulk motions
• The Carnegie-Chicago Hubble Program. I. An Independent Approach to the Extragalactic Distance Scale Using only Population II Distance Indicators
• POTENT Reconstruction from Mark III Velocities
• Galaxy Groups
• 3D Velocity and Density Reconstructions of the Local Universe with Cosmicflows-1
• Galaxy Cluster Mass Reconstruction Project: II. Quantifying scatter and bias using contrasting mock catalogues
• Galaxy Cluster Mass Reconstruction Project: I. Methods and first results on galaxy-based techniques
• Cosmic Bulk Flow and the Local Motion from Cosmicflows-2
• Friends-of-friends galaxy group finder with membership refinement. Application to the local Universe
• Constrained Local UniversE Simulations: A Local Group Factory
• Simulations of the Local Universe Constrained by Observational Peculiar Velocities
• Comparison of the SFI Peculiar Velocities with the IRAS 1.2 Jy Gravity Field
• Large Scale Power Spectrum from Peculiar Velocities Via Likelihood Analysis
• The Two-Point Correlation of Galaxy Groups: Probing the Clustering of Dark Matter Haloes
• Bayesian 3d velocity field reconstruction with VIRBIuS
• Minimization of Biases in Galaxy Peculiar Velocity Catalogs
• Large-Scale Power Spectrum and Structures From the ENEAR galaxy Peculiar Velocity Catalog
• Large-scale Cosmic Flows from Cosmicflows-2 Catalog
• How did the Virgo cluster form?
• Estimation of Peculiar Velocity from the Inverse Tully-Fisher Relation
• Studying the Peculiar Velocity Bulk Flow in a Sparse Survey of Type-Ia SNe
• The tangential velocity of M31: CLUES from constrained simulations
• Goodness-of-fit analysis of the Cosmicflows-2 database of velocities
• Measurement of Hubble constant: Non-Gaussian Errors in HST key project data

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• Merging groups and clusters of galaxies from the SDSS data. The catalogue of groups and potentially merging systems
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• Simulating the LOcal Web (SLOW): I. Anomalies in the local density field
• Galaxy clusters in local Universe simulations without density constraints: a long uphill struggle
• Galaxy clusters in simulations of the local Universe: a matter of constraints
• I- A hydrodynamical CLONE of the Virgo cluster of galaxies to confirm observationally-driven formation scenarios
• Bayesian cosmic density field inference from redshift space dark matter maps
• The cosmic web around the Coma cluster from constrained cosmological simulations: I. Filaments connected to Coma at $z=0$
• Virgo: an unlikely cluster of galaxies because of its environment
• Merger types forming the Virgo cluster in recent gigayears
• Simulating the LOcal Web (SLOW) -- III: Synchrotron emission from the local cosmic web
• Statistically bias-minimized peculiar velocity catalogs from Gibbs point processes and Bayesian inference
• Cosmic Dawn II (CoDa II): a new radiation-hydrodynamics simulation of the self-consistent coupling of galaxy formation and reionization