Can a supervoid explain the cold spot

  title={Can a supervoid explain the cold spot},
  author={Seshadri Nadathur and Mikko Lavinto and Shaun Hotchkiss and Syksy Rasanen},
  journal={Physical Review D},
The discovery of a void of size $\sim200\;h^{-1}$Mpc and average density contrast of $\sim-0.1$ aligned with the Cold Spot direction has been recently reported. It has been argued that, although the first-order integrated Sachs-Wolfe (ISW) effect of such a void on the CMB is small, the second-order Rees-Sciama (RS) contribution exceeds this by an order of magnitude and can entirely explain the observed Cold Spot temperature profile. In this paper we examine this surprising claim using both an… 

Figures from this paper

Could multiple voids explain the cosmic microwave background Cold Spot anomaly

Understanding the observed Cold Spot (CS) (temperature of ~ -150 mu K at its centre) on the Cosmic Microwave Background (CMB) is an outstanding problem. Explanations vary from assuming it is just a ≳

A common explanation of the Hubble tension and anomalous cold spots in the CMB

The standard cosmological paradigm narrates a reassuring story of a universe currently dominated by an enigmatic dark energy component. Disquietingly, its universal explaining power has recently been

Probing supervoids with weak lensing

The cosmic microwave background (CMB) has non-Gaussian features in the temperature fluctuations. An anomalous cold spot surrounded with a hot ring, called the Cold Spot is one of such features. If a

Is there evidence for anomalous dipole anisotropy in the large-scale structure?

We probe the anisotropy of the large-scale structure (LSS) with the WISE-2MASS catalogue. This analysis is performed by a directional comparison of the galaxy number counts through the entire

Evidence against a supervoid causing the CMB Cold Spot

We report the results of the 2dF-VST ATLAS Cold Spot galaxy redshift survey (2CSz) based on imaging from VST ATLAS and spectroscopy from 2dF AAOmega over the core of the CMB Cold Spot. We sparsely

The integrated Sachs–Wolfe signal from BOSS superstructures

Cosmic structures leave an imprint on the microwave background radiation through the integrated Sachs-Wolfe effect. We construct a template map of the linear signal using the SDSS-III Baryon Acoustic

Hidden in the background: a local approach to CMB anomalies

We investigate a framework aiming to provide a common origin for the large-angle anomalies detected in the Cosmic Microwave Background (CMB), which are hypothesized as the result of the statistical

More out of less: an excess integrated Sachs–Wolfe signal from supervoids mapped out by the Dark Energy Survey

The largest structures in the cosmic web probe the dynamical nature of dark energy through their integrated Sachs–Wolfe imprints. In the strength of the signal, typical cosmic voids have shown good

Imprint of DES superstructures on the cosmic microwave background

Small temperature anisotropies in the cosmic microwave background (CMB) can be sourced by density perturbations via the late-time integrated Sachs-Wolfe (ISW) effect. Large voids and superclusters

The part and the whole: voids, $super$voids, and their ISW imprint

The integrated Sachs-Wolfe imprint of extreme structures in the cosmic web probes the dynamical nature of dark energy. Looking through typical cosmic voids, no anomalous signal has been reported. On



I and i

There is, I think, something ethereal about i —the square root of minus one, which seems an odd beast at that time—an intruder hovering on the edge of reality.


  • 1248
  • 2014

Astroparticle Physics 33

  • 69 13
  • 2010


  • Rev. D 56, 4494
  • 1997


  • Rev. D 77, 103522
  • 2008

Cosmology and large scale structure


  • J. 683, L99
  • 2008


  • Phys. 6
  • 2008


  • Astrophys. 353, 63
  • 2000


  • 547
  • 2010