A measurement of the Integrated Sachs-Wolfe Effect with the Rapid ASKAP Continuum Survey

Abstract

The evolution of the gravitational potentials on large scales due to the accelerated expansion of the Universe is an important and independent probe of dark energy, known as the integrated Sachs-Wolfe (ISW) effect. We measure this ISW effect through cross-correlating the cosmic microwave background maps from the Planck satellite with a radio continuum galaxy distribution map from the recent Rapid ASKAP Continuum Survey (RACS). We detect a positive cross-correlation at $\sim 2.8\sigma$ relative to the null hypothesis of no correlation. We parameterise the strength of the ISW effect through an amplitude parameter and find the constraints to be $A_{\mathrm{ISW}}=0.94_{-0.41}^{+0.42}$, which is consistent with the prediction of an accelerating universe within the current concordance cosmological model, $\Lambda$CDM. The credible interval on this parameter is independent of the different bias models and redshift distributions that were considered when marginalising over the nuisance parameters. We also detect a power excess in the galaxy auto-correlation angular power spectrum on large scales ($\ell \le 40$), and investigate possible systematic causes.

arXiv comment18 pages, 18 figures. Angular power spectra and covariance matrices can be found at https://github.com/racs-cosmology/isw

References in corpus (77)

• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• Astropy: A Community Python Package for Astronomy
• The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
• 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
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Preliminary Maps and Basic Results
• Planck 2018 results. I. Overview and the cosmological legacy of Planck
• The Large Scale Bias of Dark Matter Halos: Numerical Calibration and Model Tests
• Why your model parameter confidences might be too optimistic -- unbiased estimation of the inverse covariance matrix
• MASTER of the CMB Anisotropy Power Spectrum: A Fast Method for Statistical Analysis of Large and Complex CMB Data Sets
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Parameter Estimation Methodology
• CMB power spectrum parameter degeneracies in the era of precision cosmology
• The axis of evil
• COLOSSUS: A python toolkit for cosmology, large-scale structure, and dark matter halos
• EMU: Evolutionary Map of the Universe
• Science with ASKAP - the Australian Square Kilometre Array Pathfinder
• A unified pseudo-$C_{\ell }$ framework
• Statistical Analysis of Galaxy Surveys - I. Robust error estimation for 2-point clustering statistics
• A correlation of the cosmic microwave sky with large scale structure
• A semi-empirical simulation of the extragalactic radio continuum sky for next generation radio telescopes
• Australian Square Kilometre Array Pathfinder: I. System Description
• Planck 2013 results. XII. Component separation
• Combined analysis of the integrated Sachs-Wolfe effect and cosmological implications
• Looking for $\Lambda$ with the Rees-Sciama Effect
• The Rapid ASKAP Continuum Survey I: Design and First Results
• Detection of the ISW and SZ effects from the CMB-Galaxy correlation
• Multi-Detector Multi-Component spectral matching and applications for CMB data analysis
• The Rapid ASKAP Continuum Survey Paper II: First Stokes I Source Catalogue Data Release
• Planck 2015 results. XXI. The integrated Sachs-Wolfe effect
• Cosmic radio dipole from NVSS and WENSS
• Detection of the velocity dipole in the radio galaxies of the NRAO VLA Sky Survey
• Improving lognormal models for cosmological fields
• Large peculiar motion of the solar system from the dipole anisotropy in sky brightness due to distant radio sources
• Dipoles in the Sky
• Constraining ultra large-scale cosmology with multiple tracers in optical and radio surveys
• The Tiered Radio Extragalactic Continuum Simulation (T-RECS)
• Measurement of the gravitational potential evolution from the cross-correlation between WMAP and the APM Galaxy survey
• Cross-correlation of WMAP 3rd year and the SDSS DR4 galaxy survey: new evidence for Dark Energy
• A radio spectral index map and catalogue at 147-1400 MHz covering 80 per cent of the sky
• Combining cosmological datasets: hyperparameters and Bayesian evidence
• Revisiting the NVSS number count dipole
• The Cosmic Radio Dipole: Estimators and Frequency Dependence
• Cosmic Shear Measurements with DES Science Verification Data
• Dipole anisotropy in sky brightness and source count distribution in radio NVSS data
• Radio Galaxy populations and the multi-tracer technique: pushing the limits on primordial non-Gaussianity
• A reassessment of the evidence of the Integrated Sachs-Wolfe effect through the WMAP-NVSS correlation
• zeus: A Python implementation of Ensemble Slice Sampling for efficient Bayesian parameter inference
• A WISE measurement of the ISW effect
• Primordial Non-Gaussianity and the NRAO VLA Sky Survey
• Measuring the Integrated Sachs-Wolfe Effect
• An infrared-radio simulation of the extragalactic sky: from the Square Kilometer Array to Herschel
• Dipole Anisotropy in Integrated Linearly Polarized Flux Density in NVSS Data
• Constraining primordial non-Gaussianity via a multitracer technique with surveys by Euclid and Square Kilometre Array
• Ensemble Slice Sampling: Parallel, black-box and gradient-free inference for correlated & multimodal distributions
• A Detection of the Integrated Sachs-Wolfe Effect
• The clustering and bias of radio-selected AGN and star-forming galaxies in the COSMOS field
• The clustering properties of radio-selected AGN and star-forming galaxies up to redshifts z~3
• Likelihood methods for the combined analysis of CMB temperature and polarisation power spectra
• Probing primordial non-Gaussianity via iSW measurements with SKA continuum surveys
• Beware of commonly used approximations II: estimating systematic biases in the best-fit parameters
• Probing the primordial Universe with MeerKAT and DES
• (Sub)millimetre interferometric imaging of a sample of COSMOS/AzTEC submillimetre galaxies III. Environments
• Testing the standard model of cosmology with the SKA: the cosmic radio dipole
• Conservative cosmology: combining data with allowance for unknown systematics
• Cross-correlating radio continuum surveys and CMB lensing: constraining redshift distributions, galaxy bias and cosmology
• Non-Gaussianity Constraints using Future Radio Continuum Surveys and the Multi-Tracer Technique
• Impact of Redshift Information on Cosmological Applications with Next-Generation Radio Surveys
• One- and Two-point Source Statistics from the LOFAR Two-metre Sky Survey First Data Release
• The angular two-point correlation of NVSS galaxies revisited
• Measuring the integrated Sachs-Wolfe effect from the low-density regions of the universe
• Cosmology on the Largest Scales with the SKA
• Developing a unified pipeline for large-scale structure data analysis with angular power spectra -- II. A case study for magnification bias and radio continuum surveys
• Measuring ISW with next-generation radio surveys
• Probing $\Lambda$CDM cosmology with the Evolutionary Map of the Universe survey
• Ultra-large-scale approximations and galaxy clustering: debiasing constraints on cosmological parameters
• Future Radio Continuum Cosmology Clustering Surveys
• Clustering properties of TGSS radio sources

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