Published December 10, 2013 | Version v1
Journal article

Excess ellipticity of hot and cold spots in the WMAP data?

  • 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/779/1/37

Additional 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