Peculiar velocities in the local Universe: comparison of different models and the implications for $H_0$ and dark matter

Abstract

When measuring the value of the Hubble parameter, $H_0$, it is necessary to know the recession velocity free of the effects of peculiar velocities. In this work, we study different models of peculiar velocity in the local Universe. In particular, we compare models based on density reconstruction from galaxy redshift surveys and kernel smoothing of peculiar velocity data. The velocity field from the density reconstruction is obtained using the 2M++ galaxy redshift compilation, which is compared to two adaptive kernel-smoothed velocity fields: the first obtained from the 6dF Fundamental Plane sample and the other using a Tully-Fisher catalogue obtained by combining SFI++ and 2MTF. We highlight that smoothed velocity fields should be rescaled to obtain unbiased velocity estimates. Comparing the predictions of these models to the observations from a few test sets of peculiar velocity data, obtained from the Second Amendment Supernovae catalogue and the Tully-Fisher catalogues, we find that 2M++ reconstruction provides a better model of the peculiar velocity in the local Universe than the kernel-smoothed peculiar velocity models. We study the impact of peculiar velocities on the measurement of $H_0$ from gravitational waves and megamasers. In doing so, we introduce a probabilistic framework to marginalize over the peculiar velocity corrections along the line-of-sight. For the megamasers, we find $H_0=69_{-2.8}^{+2.9}$ km s^{-1} Mpc^{-1} using the 2M++ velocity field. We also study the peculiar velocity of the the galaxy NGC1052-DF2, concluding that a short $\sim$ 13 Mpc distance is not a likely explanation of the anomalously low dark matter fraction of that galaxy.

arXiv commentSubmitted to MNRAS

References in corpus (43)

• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• Large Magellanic Cloud Cepheid Standards Provide a 1% Foundation for the Determination of the Hubble Constant and Stronger Evidence for Physics Beyond LambdaCDM
• A 3% Solution: Determination of the Hubble Constant with the Hubble Space Telescope and Wide Field Camera 3
• The Rockstar Phase-Space Temporal Halo Finder and the Velocity Offsets of Cluster Cores
• The SBF Survey of Galaxy Distances. IV. SBF Magnitudes, Colors, and Distances
• A gravitational-wave standard siren measurement of the Hubble constant
• Tensions between the Early and the Late Universe
• H0LiCOW XIII. A 2.4% measurement of $H_0$ from lensed quasars: $5.3\sigma$ tension between early and late-Universe probes
• Improved Dark Energy Constraints from ~100 New CfA Supernova Type Ia Light Curves
• The density and peculiar velocity fields of nearby galaxies
• A galaxy lacking dark matter
• The Megamaser Cosmology Project. XIII. Combined Hubble constant constraints
• The Carnegie Supernova Project: Analysis of the First Sample of Low-Redshift Type-Ia Supernovae
• Bayesian physical reconstruction of initial conditions from large scale structure surveys
• Cosmological parameters from the comparison of peculiar velocities with predictions from the 2M++ density field
• Correlated Fluctuations in Luminosity Distance and the (Surprising) Importance of Peculiar Motion in Supernova Surveys
• The 2M++ galaxy redshift catalogue
• Galaxy Groups within 3500 km s${}^{-1}$
• The Carnegie Supernova Project I: Third Photometry Data Release of Low-Redshift Type Ia Supernovae and Other White Dwarf Explosions
• The 6dF Galaxy Survey: Peculiar Velocity Field and Cosmography
• SFI++ I: A New I-band Tully-Fisher Template, the Cluster Peculiar Velocity Dispersion and H0
• The Foundation Supernova Survey: Motivation, Design, Implementation, and First Data Release
• Testing $\Lambda$CDM at the lowest redshifts with SN Ia and galaxy velocities
• A distance of 13 Mpc resolves the claimed anomalies of the galaxy lacking dark matter
• Physical Bayesian modelling of the non-linear matter distribution: new insights into the Nearby Universe
• 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
• 2MTF I. The Tully-Fisher Relation in the 2MASS J, H and K Bands
• Velocity correction for Hubble constant measurements from standard sirens
• The Foundation Supernova Survey: Measuring Cosmological Parameters with Supernovae from a Single Telescope
• Constraints on dark energy with the LOSS SN Ia sample
• Cosmological Parameters from the Comparison of the 2MASS Gravity Field with Peculiar Velocity Surveys
• Cosmological model insensitivity of local $H_0$ from the Cepheid distance ladder
• The 6dF Galaxy Survey: Fundamental Plane Data
• Standard Siren Speeds: Improving velocities in gravitational-wave measurements of $H_0$
• The Impact of Peculiar Velocities on the Estimation of the Hubble Constant from Gravitational Wave Standard Sirens
• The Peculiar Velocities of Local Type Ia Supernovae and their Impact on Cosmology
• Joint growth rate measurements from redshift-space distortions and peculiar velocities in the 6dF Galaxy Survey
• 2MTF V. Cosmography, Beta, and the residual bulk flow
• The TRGB distance to the second galaxy "missing dark matter". Evidence for two groups of galaxies at 13.5 and 19 Mpc in the line of sight of NGC1052
• Painting halos from cosmic density fields of dark matter with physically motivated neural networks
• 2MTF - VII. 2MASS Tully-Fisher survey final data release: distances for 2,062 nearby spiral galaxies
• Biased Estimates of Omega from Comparing Smoothed Predicted Velocity Fields to Unsmoothed Peculiar Velocity Measurements

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• Large-scale motions and growth rate from forward-modelling Tully-Fisher peculiar velocities
• Transit cosmological models in Myrzakulov F(R,T) gravity theory
• Holographic and Gravity-Thermodynamic Approaches in Entropic Cosmology: Bayesian Assessment using late-time Data
• Reconstructing dark matter distribution with peculiar velocities: Bayesian forward modelling with corrections for inhomogeneous Malmquist bias
• FLRW Cosmology in Metric-Affine $F(R,Q)$ Gravity
• Stability analysis of warm quintessential dark energy model
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• The bulk flow motion and the Hubble-Lema\^ıtre law in the Local Universe with the ALFALFA survey
• Dynamical dark energy can amplify the expansion rate of the Universe
• ${\Lambda }_{\mathrm{s}}$CDM cosmology from a type-II minimally modified gravity
• On measuring the Hubble constant with X-ray reverberation mapping of active galactic nuclei
• Tilted non-spatially-flat inflation
• Constraints on the Hubble and matter density parameters with and without modelling the CMB anisotropies
• The Velocity Field Olympics: Assessing velocity field reconstructions with direct distance tracers
• Learning the Universe: Learning to Optimize Cosmic Initial Conditions with Non-Differentiable Structure Formation Models
• New Constraints on Anisotropic Expansion from Supernovae Type Ia
• Biases in velocity reconstruction: investigating the effects on growth rate and expansion measurements in the local universe