A Cosmic Microwave Background Feature Consistent with a Cosmic Texture

  title={A Cosmic Microwave Background Feature Consistent with a Cosmic Texture},
  author={M. Cruz and Neil Turok and Patricio Vielva and Enrique Mart{\'i}nez-Gonz{\'a}lez and Michael P. Hobson},
  pages={1612 - 1614}
The Cosmic Microwave Background provides our most ancient image of the universe and our best tool for studying its early evolution. Theories of high-energy physics predict the formation of various types of topological defects in the very early universe, including cosmic texture, which would generate hot and cold spots in the Cosmic Microwave Background. We show through a Bayesian statistical analysis that the most prominent 5°-radius cold spot observed in all-sky images, which is otherwise hard… 


We find a unique direction in the cosmic microwave background sky around which giant rings have an anomalous mean temperature profile. This direction is in very close alignment with the afore


Recent measurements of hot and cold spots on the cosmic microwave background (CMB) sky suggest the presence of super-structures on (>100 h −1 Mpc) scales. We develop a new formalism to estimate the

Is the CMB cold spot a gate to extra dimensions

One of the most striking features found in the cosmic microwave background data is the presence of an anomalous cold spot (CS) in the temperature maps made by the Wilkinson Microwave Anisotropy Probe

An introduction to the Planck mission

The Cosmic Microwave Background (CMB) is the oldest light in the universe. It is seen today as black body radiation at a near-uniform temperature of 2.73 K covering the entire sky. This radiation

Polarizing Bubble Collisions

We predict the polarization of cosmic microwave background (CMB) photons that results from a cosmic bubble collision. The polarization is purely E-mode, symmetric around the axis pointing towards the

Massive black holes at high redshifts from superconducting cosmic strings

The observation of quasars at high redshifts presents a mystery in the theory of black hole formation. In order to source such objects, one often relies on the presence of heavy seeds (M ≈ 104 − 6

A redshift survey towards the cosmic microwave background cold spot

We have carried out a redshift survey using the VIMOS spectrograph on the VLT towards the cosmic microwave background cold spot. A possible cause of the cold spot is the Integrated Sachs–Wolfe effect

A study of the galaxy redshift distribution towards the cosmic microwave background cold spot in the Corona Borealis supercluster

We present a study of the spatial and redshift distributions of Sloan Digital Sky Survey (SDSS) galaxies toward the position of CrB-H, a very deep and extended decrement in the Cosmic Microwave

CMB polarization as a probe of the anomalous nature of the Cold Spot

One of the most interesting explanations for the non-Gaussian Cold Spot detected in the WMAP data by Vielva et al. (2004), is that it arises from the interaction of the CMB radiation with a cosmic

Cosmology with Coupled Gravity and Dark Energy

Dark energy is a fundamental constituent of our universe, its status in the cosmological field equation should be equivalent to that of gravity. Here we construct a dark energy and matter gravity



COBE's constraints on the global monopole and texture theories of cosmic structure formation

We report on a calculation of large-scale anisotropy in the cosmic microwave background radiation in the global monopole and texture models for cosmic structure formation. We have evolved the

Cosmic microwave background anisotropies from scaling seeds : global defect models

We investigate the global texture model of structure formation in cosmogonies with a nonzero cosmological constant for different values of the Hubble parameter. We find that the absence of

Global texture and the microwave background.

The metric perturbation produced by a collapsing knot'' of global texture in a flat background is calculated, leading to a prediction for the microwave anisotropy pattern produced in the global-texture scenario for large-scale structure formation.

Local Voids as the Origin of Large-Angle Cosmic Microwave Background Anomalies: The Effect of a Cosmological Constant

We explore the large angular scale temperature anisotropies in the cosmic microwave background (CMB) due to homogeneous local dust-filled voids in a flat Friedmann-Robertson-Walker universe with a

WMAP constraints on inflationary models with global defects

We use the cosmic microwave background angular power spectra to place upper limits on the degree to which global defects may have aided cosmic structure formation. We explore this under the

Global texture as the origin of cosmic structure

If a unified theory possesses non-Abelian global symmetries which are spontaneously broken it gives rise to a three-dimensional defect known as texture. In an expanding universe texture obeys a

On the Viability of Bianchi Type VIIh Models with Dark Energy

We generalize the predictions for the cosmic microwave background (CMB) anisotropy patterns arising in Bianchi type VIIh universes to include a dark energy component. We consider these models in

Uncorrelated universe: Statistical anisotropy and the vanishing angular correlation function in WMAP years 1 3

The large-angle (low-l) correlations of the cosmic microwave background (CMB) as reported by the Wilkinson Microwave Anisotropy Probe (WMAP) after their first year of observations exhibited

First-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Preliminary Maps and Basic Results

We present full-sky microwave maps in five frequency bands (23-94 GHz) from the Wilkinson Microwave Anisotropy Probe (WMAP) first-year sky survey. Calibration errors are less than 0.5%, and the low

Temperature-polarization correlations from tensor fluctuations.

We study the polarization-temperature correlations on the cosmic microwave sky resulting from an initial scale-invariant spectrum of tensor (gravity wave) fluctuations, such as those which might