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The hot and cold spots in five-year WMAP data
Hou, Zhen1,2,3; Banday, A. J.2,4; Gorski, K. M.5,6,7
2009-07-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume396Issue:3Pages:1273-1286
AbstractWe present an extensive frequentist analysis of the one-point statistics (number, mean, variance, skewness and kurtosis) and two-point correlation functions determined for the local extrema of the cosmic microwave background temperature field observed in five-years of Wilkinson Microwave Anisotropy Probe (WMAP) data. Application of a hypothesis test on the one-point statistics indicates a low variance of hot and cold spots in all frequency bands of the WMAP data. The consistency of the observations with Gaussian simulations of the best-fitting cosmological model is rejected at the 95 per cent confidence level outside the WMAP KQ75 mask and the Northern hemispheres in the Galactic and ecliptic coordinate frames. We demonstrate that it is unlikely that residual Galactic foreground emission contributes to the observed non-Gaussianities. However, the application of a high-pass filter that removes large angular scale power does improve the consistency with the best-fitting cosmological model.
KeywordMethods: Data Analysis Cosmic Microwave Background
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1111/j.1365-2966.2009.14810.x
WOS KeywordNON-GAUSSIAN STATISTICS ; ANISOTROPY-PROBE DATA ; SKY MAPS ; BACKGROUND-RADIATION ; MICROWAVE SKY ; PEAKS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000267072100006
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/15940
Collection星系宇宙学和暗能量研究团组
Affiliation1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
2.Max Planck Inst Astrophys, D-85748 Garching, Germany
3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
4.Ctr Etud Spatiale Rayonnements, F-31028 Toulouse 4, France
5.CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA
6.CALTECH, Pasadena, CA 91125 USA
7.Univ Warsaw Observ, PL-00478 Warsaw, Poland
Recommended Citation
GB/T 7714
Hou, Zhen,Banday, A. J.,Gorski, K. M.. The hot and cold spots in five-year WMAP data[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2009,396(3):1273-1286.
APA Hou, Zhen,Banday, A. J.,&Gorski, K. M..(2009).The hot and cold spots in five-year WMAP data.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,396(3),1273-1286.
MLA Hou, Zhen,et al."The hot and cold spots in five-year WMAP data".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 396.3(2009):1273-1286.
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