The bulk flow motion and the Hubble-Lema\^ıtre law in the Local Universe with the ALFALFA survey

Abstract

The knowledge of the main features of the bulk flow in the Local Universe is important for a better determination of the relative motions there, an information that would contribute to a precise calculation of the Hubble-Lema\^ıtre law at very low redshifts. We study how to obtain the Hubble-Lema\^ıtre law in two sky regions using the catalog of HI sources of the ALFALFA survey, with data $c{z}_{\odot }<6000$ km/s. Our methodology aims to compute $H_0$ in two regions -- located in opposite galactic hemispheres -- mapped by the ALFALFA survey, and look for dependence with distance, direction, and also test for reference frame changes. We calculate the Hubble constant, in the Cosmic Microwave Background reference frame, in opposite galactic hemispheres: $H_0^N=70.87\pm 2.38$ and $H_0^S=66.07\pm 3.02$, which allows us to measure the bulk flow velocity $V_{BF}=401.06\pm 150.55$ km/s at the effective distance $31.3\pm 6.26$ Mpc, a novel result found analysing the ALFALFA data at low redshift. We confirm the influence of the bulk flow on the structures of the Local Universe which manifests through a dipolar behavior of the Hubble constant in opposite hemispheres.

References in corpus (57)

• Large Magellanic Cloud Cepheid Standards Provide a 1% Foundation for the Determination of the Hubble Constant and Stronger Evidence for Physics Beyond LambdaCDM
• The Carnegie-Chicago Hubble Program. VIII. An Independent Determination of the Hubble Constant Based on the Tip of the Red Giant Branch
• Cosmic Distances Calibrated to 1% Precision with Gaia EDR3 Parallaxes and Hubble Space Telescope Photometry of 75 Milky Way Cepheids Confirm Tension with LambdaCDM
• Cosmicflows-2: The Data
• The Arecibo Legacy Fast ALFA Survey: The ALFALFA Extragalactic HI Source Catalog
• Our Peculiar Motion Away from the Local Void
• Consistently Large Cosmic Flows on Scales of 100 Mpc/h: a Challenge for the Standard LCDM Cosmology
• 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
• The Hubble flow around the CenA / M83 galaxy complex
• Deviations from the Local Hubble Flow. I. The Tip of the Red Giant Branch as a Distance Indicator
• Consistent Calibration of the Tip of the Red Giant Branch in the Large Magellanic Cloud on the Hubble Space Telescope Photometric System and a Re-determination of the Hubble Constant
• Probing the anisotropic local universe and beyond with SNe Ia data
• The Solar Motion Relative to the Local Group
• The ALFALFA HI mass function: A dichotomy in the low-mass slope and a locally suppressed 'knee' mass
• Quantifying cosmic variance
• Cosmic flow from 2MASS redshift survey: The origin of CMB dipole and implications for LCDM cosmology
• Cosmic variance and the measurement of the local Hubble parameter
• The very local Hubble flow
• The Hubble flow around the Local Group
• The Dipole Anisotropy of the 2 Micron All-Sky Redshift Survey
• Joint analysis of 6dFGS and SDSS peculiar velocities for the growth rate of cosmic structure and tests of gravity
• The cosmological bulk flow: consistency with $\Lambda$CDM and $z\approx 0$ constraints on ${\sigma }_8$ and $\gamma$
• Cosmic flows in the nearby Universe: new peculiar velocities from SNe and cosmological constraints
• Sample variance in the local measurements of the Hubble constant
• The 6dF Galaxy Survey: Bulk Flows on $50-70h^{-1}$ Mpc scales
• On The Origin of the Local Group's Peculiar Velocity
• Cosmological Parameters from the Comparison of the 2MASS Gravity Field with Peculiar Velocity Surveys
• The Dipole Repeller
• The impact of the cosmic variance on $H_0$ on cosmological analyses
• Dark sector interaction and the supernova absolute magnitude tension
• BAO angular scale at z_eff = 0.11 with the SDSS blue galaxies
• Measuring the cosmological bulk flow using the peculiar velocities of supernovae
• Cosmic bulk flows on 50 {h}^{-1}Mpc scales: A Bayesian hyper-parameter method and multishells likelihood analysis
• Extragalactic HI Surveys
• 2MTF IV. A bulk flow measurement of the local Universe
• Is the 2MASS clustering dipole convergent?
• Inferring $S_8(z)$ and $\gamma (z)$ with cosmic growth rate measurements using machine learning
• The growth rate of cosmic structures in the local Universe with the ALFALFA survey
• BAO signatures in the 2-point angular correlations and the Hubble tension
• Constraining the dark energy models using Baryon Acoustic Oscillations: An approach independent of $H_0\cdot r_d$
• Minimal dark energy: key to sterile neutrino and Hubble constant tensions?
• Machine learning constraints on deviations from general relativity from the large scale structure of the Universe
• Peculiar velocities in the local Universe: comparison of different models and the implications for $H_0$ and dark matter
• Tomographic analyses of the CMB lensing and galaxy clustering to probe the linear structure growth
• The scale of homogeneity in the local Universe with the ALFALFA catalogue
• Is there evidence for anomalous dipole anisotropy in the large-scale structure?
• The angular scale of homogeneity in the Local Universe with the SDSS blue galaxies
• The homogeneity scale and the growth rate of cosmic structures
• Cross-correlation between Subaru Hyper Suprime-Cam Galaxy Weak Lensing and Planck Cosmic Microwave Background Lensing
• Bulk flow and shear in the local Universe: 2MTF and COSMICFLOWS-3
• Measuring dark energy with expansion and growth
• Detection of cross-correlation between CMB Lensing and low-density points
• Excess of lensing amplitude in the Planck CMB power spectrum
• Unravelling the Cosmic Web: An analysis of the SDSS DR14 with the Local Dimension
• Potentialities of Hubble parameter and expansion rate function data to alleviate Hubble tension
• Allan Sandage and the Cosmic Expansion

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