Limits on fNL parameters from Wilkinson microwave Anisotropy Probe three-year data

被引：133

作者：

Creminelli, Paolo

Senatore, Leonardo

Zaldarriaga, Matias

Tegmark, Max

机构：

[1] Abdus Salam Int Ctr Theoret Phys, I-34014 Trieste, Italy

[2] Harvard Univ, Jefferson Phys Lab, Cambridge, MA 02138 USA

[3] Harvard Univ, Ctr Astrophys, Cambridge, MA 02138 USA

[4] MIT, Dept Phys, Cambridge, MA 02139 USA

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2007年 / 03期

基金：

美国国家科学基金会;

关键词：

CMBR experiments; CMBR theory; cosmological perturbation theory; inflation;

D O I：

10.1088/1475-7516/2007/03/005

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We analyse the three-year Wilkinson Microwave Anisotropy Probe data and look for a deviation from Gaussianity in the form of a three-point function that has either of the two theoretically motivated shapes: local and equilateral. There is no evidence of departure from Gaussianity and the analysis gives the currently tightest bounds on the parameters f(NL)(local) and f(NL)(equil) , which define the amplitudes of respectively the local non-Gaussianity and the equilateral non-Gaussianity: - 36 < f(NL)(local) < 100, - 256 < f(NL)(equil) < 332 at 95% C. L.

引用

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