On the void explanation of the Cold Spot

Abstract

The integrated Sachs-Wolfe (ISW) contribution induced on the cosmic microwave background by the presence of a supervoid as the one detected by Szapudi et al. (2015) is reviewed in this letter in order to check whether it could explain the Cold Spot (CS) anomaly. Two different models, previously used for the same purpose, are considered to describe the matter density profile of the void: a top hat function and a compensated profile produced by a Gaussian potential. The analysis shows that, even enabling ellipticity changes or different values for the dark-energy equation of state parameter $\omega$, the ISW contribution due to the presence of the void does not reproduce the properties of the CS. Finally, the probability of alignment between the void and the CS is also questioned as an argument in favor of a physical connection between these two phenomena.

References in corpus (6)

• Extragalactic Radio Sources and the WMAP Cold Spot
• Local Voids as the Origin of Large-angle Cosmic Microwave Background Anomalies I
• The CMB cold spot: texture, cluster or void?
• Detection of a Supervoid Aligned with the Cold Spot of the Cosmic Microwave Background
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Cited by in corpus (15)

• A detection of the integrated Sachs-Wolfe imprint of cosmic superstructures using a matched-filter approach
• More out of less: an excess integrated Sachs-Wolfe signal from supervoids mapped out by the Dark Energy Survey
• Imprint of DES super-structures on the Cosmic Microwave Background
• Cosmic troublemakers: the Cold Spot, the Eridanus Supervoid, and the Great Walls
• The part and the whole: voids, supervoids, and their ISW imprint
• The DES view of the Eridanus supervoid and the CMB Cold Spot
• Probing cosmological isotropy with Planck Sunyaev-Zeldovich galaxy clusters
• Dark matter solution to the $H_0$ and $S_8$ tensions, and the integrated Sachs-Wolfe void anomaly
• A common explanation of the Hubble tension and anomalous cold spots in the CMB
• Could multiple voids explain the Cosmic Microwave Background Cold Spot anomaly?
• An alternative approach to modelling a cosmic void and its effect on the cosmic microwave background
• CMB Cold Spot in the Planck light
• The cosmic microwave background Cold Spot anomaly: the impact of sky masking and the expected contribution from the Integrated Sachs-Wolfe effect
• Excessive shift of the CMB acoustic peaks of the Cold Spot area
• Hidden in the background: a local approach to CMB anomalies