The Statistical Significance of the "Dark Flow"

Abstract

We revisit the statistical significance of the "dark flow" presented in Kashlinsky et al. (2009). We do not find a statistically significant detection of a bulk flow. Instead we find that CMB correlations between the 8 WMAP channels used in this analysis decrease the inferred significance of the detection to 0.7σ.

matches version in ApJL, Volume 707, Issue 1, pp. L42-L44 (2009)

References in corpus (2)

• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Data Processing, Sky Maps, and Basic Results
• Three-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Temperature Analysis

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• The 6dF Galaxy Survey: Bulk Flows on $50-70h^{-1}$ Mpc scales
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• The Local Hole revealed by galaxy counts and redshifts
• Hubble flow variance and the cosmic rest frame
• Measuring the dark flow with public X-ray cluster data
• Measuring the Galaxy Cluster Bulk Flow from WMAP data
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• First measurement of the bulk flow of nearby galaxies using the cosmic microwave background
• Probing the Dark Flow signal in WMAP 9 yr and PLANCK cosmic microwave background maps
• Probing bulk flow with nearby SNe Ia data
• Anisotropy of the galaxy cluster X-ray luminosity-temperature relation
• Galaxy Cluster Bulk Flows and Collision Velocities in QUMOND
• The dark flow induced small scale kinetic Sunyaev Zel'dovich effect
• One Thousand and One Clusters: Measuring the Bulk Flow with the Planck ESZ and X-Ray Selected Galaxy Cluster Catalogs
• Studying the Peculiar Velocity Bulk Flow in a Sparse Survey of Type-Ia SNe
• The error budget of the Dark Flow measurement
• Ultra-compact radio sources and the isotropy and homogeneity of the Universe
• On the Statistical Significance of the Bulk Flow Measured by the PLANCK Satellite
• Measuring Bulk Flow of Galaxy Clusters using Kinematic Sunyaev-Zel'dovich effect: Prediction for Planck
• Tracing the cosmic velocity field at z ~ 0.1 from galaxy luminosities in the SDSS DR7
• Using measurements of the cosmic bulk flow to constrain $f(R)$ Gravity
• The kinetic Sunyaev-Zel'dovich tomography II: probing the circumgalactic medium
• Cluster mislocation in kinematic Sunyaev-Zel'dovich (kSZ) effect extraction
• Limits on Entanglement Effects in the String Landscape from Planck and BICEP/Keck Data
• Gravitational fluctuations of the galaxy distribution
• The Polarization Signature of Local Bulk Flows
• A large anisotropy in the sky distribution of 3CRR quasars and other radio galaxies
• Expected redshift drift for tilted observers