Cosmic Flow Measurement and Mock Sampling Algorithm of Cosmicflows-4 Tully-Fisher Catalogue

Abstract

Measurements of cosmic flows enable us to test whether cosmological models can accurately describe the evolution of the density field in the nearby Universe. In this paper, we measure the low-order kinematic moments of the cosmic flow field, namely bulk flow and shear moments, using the Cosmicflows-4 Tully-Fisher catalogue (CF4TF). To make accurate cosmological inferences with the CF4TF sample, it is important to make realistic mock catalogues. We present the mock sampling algorithm of CF4TF. These mock can accurately realize the survey geometry and luminosity selection function, enabling researchers to explore how these systematics affect the measurements. These mocks can also be further used to estimate the covariance matrix and errors of power spectrum and two-point correlation function in future work. In this paper, we use the mocks to test the cosmic flow estimator and find that the measurements are unbiased. The measured bulk flow in the local Universe is 376 $\pm$ 23 (error) $\pm$ 183 (cosmic variance) km s${}^{-1}$ at depth $d_{\text{MLE}}=35$ Mpc $h^{-1}$, to the Galactic direction of $(l,b)=(298\pm 3^{\circ },-6\pm 3^{\circ })$. Both the measured bulk and shear moments are consistent with the concordance $\Lambda$ Cold Dark Matter cosmological model predictions.

arXiv comment15 pages, 13 figures, 2 tables. Appear in ApJ

References in corpus (65)

• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• emcee: The MCMC Hammer
• The Sloan Digital Sky Survey: Technical Summary
• A Universal Density Profile from Hierarchical Clustering
• The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
• HEALPix -- a Framework for High Resolution Discretization, and Fast Analysis of Data Distributed on the Sphere
• Efficient Computation of CMB anisotropies in closed FRW models
• The Aquarius Project: the subhalos of galactic halos
• Power Spectrum Analysis of Three-Dimensional Redshift Surveys
• Modeling Luminosity-Dependent Galaxy Clustering Through Cosmic Time
• The Arecibo Legacy Fast ALFA Survey: The alpha.40 HI Source Catalog, its Characteristics and their Impact on the Derivation of the HI Mass Function
• Halo concentrations in the standard LCDM cosmology
• Linking halo mass to galaxy luminosity
• The density and peculiar velocity fields of nearby galaxies
• Cosmicflows-3
• The Arecibo Legacy Fast ALFA Survey: The ALFALFA Extragalactic HI Source Catalog
• A Digital Archive of HI 21 cm Line Spectra of Optically-targeted Galaxies
• Solving Large Scale Structure in Ten Easy Steps with COLA
• Consistently Large Cosmic Flows on Scales of 100 Mpc/h: a Challenge for the Standard LCDM Cosmology
• The Clustering of the SDSS Main Galaxy Sample II: Mock galaxy catalogues and a measurement of the growth of structure from Redshift Space Distortions at $z=0.15$
• Cosmological parameters from the comparison of peculiar velocities with predictions from the 2M++ density field
• Cosmic flows in the nearby universe from Type Ia Supernovae
• Correlated Fluctuations in Luminosity Distance and the (Surprising) Importance of Peculiar Motion in Supernova Surveys
• A Measurement of the Quadrupole Power Spectrum in the Clustering of the 2dF QSO Survey
• Structure Finding in Cosmological Simulations: The State of Affairs
• Probing the anisotropic local universe and beyond with SNe Ia data
• SubHaloes going Notts: The SubHalo-Finder Comparison Project
• The Population of Dark Matter Subhaloes: Mass Functions and Average Mass Loss Rates
• Cosmic Flows on 100 Mpc/h Scales: Standardized Minimum Variance Bulk Flow, Shear and Octupole Moments
• The 6dF Galaxy Survey: Peculiar Velocity Field and Cosmography
• Cosmic flow from 2MASS redshift survey: The origin of CMB dipole and implications for LCDM cosmology
• Measuring line-of-sight dependent Fourier-space clustering using FFTs
• Joint analysis of 6dFGS and SDSS peculiar velocities for the growth rate of cosmic structure and tests of gravity
• The peculiar motions of early-type galaxies in two distant regions - VII. Peculiar velocities and bulk motions
• The cosmological bulk flow: consistency with $\Lambda$CDM and $z\approx 0$ constraints on ${\sigma }_8$ and $\gamma$
• Cosmicflows 4: The Calibration of Optical and Infrared Tully-Fisher Relations
• The 6dF Galaxy Velocity Survey: Cosmological constraints from the velocity power spectrum
• Cosmic flows in the nearby Universe: new peculiar velocities from SNe and cosmological constraints
• The 6dF Galaxy Survey: The Near-Infrared Fundamental Plane of Early-Type Galaxies
• The Extragalactic Distance Database: All Digital HI Profile Catalog
• 2MTF I. The Tully-Fisher Relation in the 2MASS J, H and K Bands
• Large Scale Structure in the Local Universe: The 2MASS Galaxy Catalog
• Cosmicflows-4: The Catalog of ~10000 Tully-Fisher Distances
• The 6dF Galaxy Survey: Bulk Flows on $50-70h^{-1}$ Mpc scales
• 2MTF VI. Measuring the velocity power spectrum
• Comparing approximate methods for mock catalogues and covariance matrices II: Power spectrum multipoles
• Deriving accurate peculiar velocities (even at high redshift)
• The Redshift Space Momentum Power Spectrum II: measuring the growth rate from the combined 2MTF and 6dFGSv surveys
• The peculiar velocity field: constraining the tilt of the Universe
• SURFS: Riding the waves with Synthetic UniveRses For Surveys
• Cosmic Flows : Green Bank and Parkes HI observations
• Measuring the cosmological bulk flow using the peculiar velocities of supernovae
• Improving constraints on the growth rate of structure by modelling the density-velocity cross-correlation in the 6dF Galaxy Survey
• Cosmic bulk flows on 50 {h}^{-1}Mpc scales: A Bayesian hyper-parameter method and multishells likelihood analysis
• An Unbiased Estimator of Peculiar Velocity with Gaussian Distributed Errors for Precision Cosmology
• 2MTF IV. A bulk flow measurement of the local Universe
• Likelihood Analysis of Large-Scale Flows
• An estimation of local bulk flow with the maximum-likelihood method
• Peculiar-velocity cosmology with Types Ia and II supernovae
• The Redshift-Space Momentum Power Spectrum I: Optimal Estimation From Peculiar Velocity Surveys
• Estimation of Peculiar Velocity from the Inverse Tully-Fisher Relation
• Bulk flow and shear in the local Universe: 2MTF and COSMICFLOWS-3
• Bulk Flow and Shear Moments of the SFI++ Survey
• Global Attenuation in Spiral Galaxies in Optical and Infrared Bands
• Bulk flow in the combined 2MTF and 6dFGSv surveys

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• Is the Observable Universe Consistent with the Cosmological Principle?
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• Evaluating bulk flow estimators for CosmicFlows-4 measurements
• Reconstructing the cosmological density and velocity fields from redshifted galaxy distributions using V-net
• HI HOD -- I. The Halo Occupation Distribution of HI Galaxies
• In search for the Local Universe dynamical homogeneity scale with CF4++ peculiar velocities
• Measuring cosmic dipole with the GRB luminosity-time relation