To the center of cold spot with Planck
arXiv:1404.6347 · doi:10.1051/0004-6361/201423565
Abstract
The structure of the cold spot, of a non-Gaussian anomaly in the cosmic microwave background (CMB) sky first detected by Vielva et al. is studied using the data by Planck satellite. The obtained map of the degree of stochasticity (K-map) of CMB for the cold spot, reveals, most clearly in 100 GHz band, a shell-type structure with a center coinciding with the minima of the temperature distribution. The shell structure is non-Gaussian at a 4σconfidence level. Such behavior of the K-map supports the void nature of the cold spot. The applied method can be used for tracing voids that have no signatures in redshift surveys.
A & A (in press), 4 pages, 5 figures; to match the published version
References in corpus (8)
- Local Voids as the Origin of Large-angle Cosmic Microwave Background Anomalies I
- Needlet Detection of Features in WMAP CMB Sky and the Impact on Anisotropies and Hemispherical Asymmetries
- Kolmogorov cosmic microwave background sky
- Kolmogorov stochasticity parameter measuring the randomness in Cosmic Microwave Background
- Porosity criterion for hyperbolic voids and the cosmic microwave background
- Large Scale Plane-Mirroring in the Cosmic Microwave Background WMAP5 Maps
- Flat Universe with Hyperbolic Voids
- 21-cm Lensing and the Cold Spot in the Cosmic Microwave Background
Cited by in corpus (10)
- Planck CMB Anomalies: Astrophysical and Cosmological Secondary Effects and the Curse of Masking
- Cosmic voids and the kinetic analysis. III. Hubble tension and structure formation in the late Universe
- Cosmic voids and the kinetic analysis. II. Link to Hubble tension
- Cosmic voids and induced hyperbolicity. II. Sensitivity to void/wall scales
- Cosmic voids and induced hyperbolicity
- Cosmic voids and induced hyperbolicity. III. tracing redshift dependence
- Smearing of primordial gravitational waves
- The cosmological constant vs adiabatic invariance
- Gravitational waves as waveguides
- On the detection of point sources in Planck LFI 70 GHz CMB maps based on cleaned K-map