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

被引：131
|
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.
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页数：10
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