Non-Gaussianity in the cosmic microwave background anisotropies at recombination in the squeezed limit

被引：35
|
作者：
Bartolo, N. [1 ,2 ]
Matarrese, S. [1 ,2 ]
Riotto, A. [2 ,3 ]
机构：
[1] Univ Padua, Dipartimento Fis G Galilei, I-131 Padua, Italy
[2] Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy
[3] CERN, Div Theory, CH-1211 Geneva 23, Switzerland
来源：
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2012年 / 02期
关键词：
non-gaussianity; CMBR theory; COSMOLOGICAL PERTURBATIONS; CURVATON SCENARIO; ART; INFLATION; CMB; BISPECTRUM; PROBE;
D O I：
10.1088/1475-7516/2012/02/017
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We estimate analytically the second-order cosmic microwave background temperature anisotropies at the recombination epoch in the squeezed limit and we deduce the contamination of the primordial local non-Gaussianity. We find that the level of contamination corresponds to f(NL)(con) = O(1) which is below the sensitivity of present experiments and smaller than the value O(5) recently claimed in the literature.
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页数：16
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