First‐Year Wilkinson Microwave Anisotropy Probe ( WMAP ) Observations: Tests of Gaussianity | Zendy

Eiichiro Komatsu | Zendy; A. Kogut | Zendy; M. R. Nolta | Zendy; C. L. Bennett | Zendy; M. Halpern | Zendy; G. Hinshaw | Zendy; N. Jarosik | Zendy; M. Limon | Zendy; S. S. Meyer | Zendy; Lyman A. Page | Zendy; David N. Spergel | Zendy; Gregory S. Tucker | Zendy; Licia Verde | Zendy; Edward J. Wollack | Zendy; E. L. Wright | Zendy

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First‐Year Wilkinson Microwave Anisotropy Probe ( WMAP ) Observations: Tests of Gaussianity

Author(s) -

Eiichiro Komatsu,

A. Kogut,

M. R. Nolta,

C. L. Bennett,

M. Halpern,

G. Hinshaw,

N. Jarosik,

M. Limon,

S. S. Meyer,

Lyman A. Page,

David N. Spergel,

Gregory S. Tucker,

Licia Verde,

Edward J. Wollack,

E. L. Wright

Publication year - 2003

Publication title -

the astrophysical journal supplement series

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.546

H-Index - 277

eISSN - 1538-4365

pISSN - 0067-0049

DOI - 10.1086/377220

Subject(s) - cmb cold spot , cosmic microwave background , bispectrum , physics , non gaussianity , astrophysics , amplitude , spectral density , cosmic background radiation , primordial fluctuations , gaussian , anisotropy , statistical physics , statistics , quantum mechanics , mathematics

We present limits to the amplitude of non-Gaussian primordial fluctuations inthe WMAP 1-year cosmic microwave background sky maps. A non-linear couplingparameter, f_NL, characterizes the amplitude of a quadratic term in theprimordial potential. We use two statistics: one is a cubic statistic whichmeasures phase correlations of temperature fluctuations after combining allconfigurations of the angular bispectrum. The other uses the Minkowskifunctionals to measure the morphology of the sky maps. Both methods find theWMAP data consistent with Gaussian primordial fluctuations and establishlimits, -58

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