The DES view of the Eridanus supervoid and the CMB Cold Spot

Abstract

The Cold Spot is a puzzling large-scale feature in the Cosmic Microwave Background temperature maps and its origin has been subject to active debate. As an important foreground structure at low redshift, the Eridanus supervoid was recently detected, but it was subsequently determined that, assuming the standard $\Lambda$CDM model, only about 10-20$\%$ of the observed temperature depression can be accounted for via its Integrated Sachs-Wolfe imprint. However, $R\gtrsim 100h^{-1}\mathrm{Mpc}$ supervoids elsewhere in the sky have shown ISW imprints $A_{\mathrm{ISW}}\approx 5.2\pm 1.6$ times stronger than expected from $\Lambda$CDM ($A_{\mathrm{ISW}}=1$), which warrants further inspection. Using the Year-3 redMaGiC catalogue of luminous red galaxies from the Dark Energy Survey, here we confirm the detection of the Eridanus supervoid as a significant under-density in the Cold Spot's direction at $z<0.2$. We also show, with $S/N\gtrsim 5$ significance, that the Eridanus supervoid appears as the most prominent large-scale under-density in the dark matter mass maps that we reconstructed from DES Year-3 gravitational lensing data. While we report no significant anomalies, an interesting aspect is that the amplitude of the lensing signal from the Eridanus supervoid at the Cold Spot centre is about $30\%$ lower than expected from similar peaks found in N-body simulations based on the standard $\Lambda$CDM model with parameters ${\Omega }_{\mathrm{m}}=0.279$ and ${\sigma }_8=0.82$. Overall, our results confirm the causal relation between these individually rare structures in the cosmic web and in the CMB, motivating more detailed future surveys in the Cold Spot region.

accepted for publication by MNRAS, 14 pages, 10 figures

References in corpus (34)

• In the Realm of the Hubble tension $-$ a Review of Solutions
• KiDS-1000 Cosmology: Multi-probe weak gravitational lensing and spectroscopic galaxy clustering constraints
• Transients from Initial Conditions in Cosmological Simulations
• An Imprint of Super-Structures on the Microwave Background due to the Integrated Sachs-Wolfe Effect
• Lensing is Low: Cosmology, Galaxy Formation, or New Physics?
• Dark Energy Survey Year 3 Results: Photometric Data Set for Cosmology
• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Large-scale Structure Catalogs for Cosmological Analysis
• Dark Energy Survey Year 3 Results: Weak Lensing Shape Catalogue
• Extragalactic Radio Sources and the WMAP Cold Spot
• Local Voids as the Origin of Large-angle Cosmic Microwave Background Anomalies I
• Full-sky Gravitational Lensing Simulation for Large-area Galaxy Surveys and Cosmic Microwave Background Experiments
• Local Voids as the Origin of Large-angle Cosmic Microwave Background Anomalies: The Effect of a Cosmological Constant
• The CMB cold spot: texture, cluster or void?
• Dark Energy Survey Year 3 results: curved-sky weak lensing mass map reconstruction
• Detection of a Supervoid Aligned with the Cold Spot of the Cosmic Microwave Background
• Galaxy clustering in the DESI Legacy Survey and its imprint on the CMB
• A detection of the integrated Sachs-Wolfe imprint of cosmic superstructures using a matched-filter approach
• Homogeneity and isotropy in the 2MASS Photometric Redshift catalogue
• The lensing and temperature imprints of voids on the Cosmic Microwave Background
• Cosmological Forecast for non-Gaussian Statistics in large-scale weak Lensing Surveys
• The stacked ISW signal of rare superstructures in ΛCDM
• Imprint of DES super-structures on the Cosmic Microwave Background
• Cosmological constraints from Subaru weak lensing cluster counts
• On the halo-mass and radial scale dependence of the lensing is low effect
• Mapping the Integrated Sachs-Wolfe Effect
• The Gravitational Lensing Signatures of BOSS Voids in the Cosmic Microwave Background
• Cosmicflows-3: Cold Spot Repeller?
• Stacked CMB lensing and ISW signals around superstructures in the DESI Legacy Survey
• Tracing the gravitational potential using cosmic voids
• Gaussian Approximation of Peak Values in the Integrated Sachs-Wolfe Effect
• A common explanation of the Hubble tension and anomalous cold spots in the CMB
• Optimal void finders in weak lensing maps
• Subaru Hyper Suprime-Cam excavates colossal over- and under-dense structures over 360 deg2 out to z=1
• Ray tracing the integrated Sachs-Wolfe effect through the light cones of the Dark Energy Universe Simulation -- Full Universe Runs

Cited by in corpus (18)

• The Pantheon+ Analysis: Cosmological Constraints
• The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
• From galactic bars to the Hubble tension: weighing up the astrophysical evidence for Milgromian gravity
• Euclid: Cosmological forecasts from the void size function
• $\Lambda$CDM Tensions: Localising Missing Physics through Consistency Checks
• Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies
• Evidence for a high-z ISW signal from supervoids in the distribution of eBOSS quasars
• A possible common explanation for several cosmic microwave background (CMB) anomalies: A strong impact of nearby galaxies on observed large-scale CMB fluctuations
• Dark matter solution to the $H_0$ and $S_8$ tensions, and the integrated Sachs-Wolfe void anomaly
• Dark Energy Survey Year 3 results: imprints of cosmic voids and superclusters in the Planck CMB lensing map
• The CMB cold spot under the lens: ruling out a supervoid interpretation
• The CMB lensing imprint of cosmic voids detected in the WISE-Pan-STARRS luminous red galaxy catalog
• Generative modelling for mass-mapping with fast uncertainty quantification
• The Gravitational Lensing Imprints of DES Y3 Superstructures on the CMB: A Matched Filtering Approach
• The frozen vanilla model: Exploring dark sector interactions with delta effective theories
• Tracing the high-z cosmic web with Quaia: catalogues of voids and clusters in the quasar distribution
• Searching for Dark Structures: A Comparison of Weak-lensing Convergence Maps and Lensing-weighted Galaxy Density Maps
• Integrated Sachs-Wolfe maps from the Gower Street $w$CDM simulations