Published December 10, 2013
| Version v1
Journal article
Excess ellipticity of hot and cold spots in the WMAP data?
Creators
- 1. Institute of Theoretical Astrophysics, University of Oslo, P.O. Box 1029 Blindern, N-0315 Oslo (Norway)
Description
We investigate claims of excess ellipticity of hot and cold spots in the Wilkinson Microwave Anisotropy Probe (WMAP) data. Using the cosmic microwave background (CMB) data from 7 yr of observations by the WMAP satellite, we find, contrary to previous claims of a 10σ detection of excess ellipticity in the 3 yr data, that the ellipticity of hot and cold spots is perfectly consistent with simulated CMB maps based on the concordance cosmology. We further test for excess obliquity and excess skewness/kurtosis of ellipticity and obliquity and find the WMAP7 data consistent with Gaussian simulated maps.
Availability note (English)
Available from http://dx.doi.org/10.1088/0004-637X/779/1/37Additional details
Identifiers
Publishing Information
- Journal Title
- Astrophysical Journal
- Journal Volume
- 779
- Journal Issue
- 1
- Journal Page Range
- [6 p.]
- ISSN
- 0004-637X
- CODEN
- ASJOAB
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 46054885
- Subject category
- S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Descriptors DEI
- ANISOTROPY; ASYMMETRY; BACKGROUND RADIATION; COSMOLOGY; DATA ANALYSIS; DETECTION; DISTRIBUTION; MAPS; RELICT RADIATION; SATELLITES; SIMULATION; STATISTICS
- Descriptors DEC
- DATA PROCESSING; ELECTROMAGNETIC RADIATION; MATHEMATICS; MICROWAVE RADIATION; PROCESSING; RADIATIONS