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.

引用

页数：10

共 23 条

[1] Gauge-invariant second-order perturbations and non-Gaussianity from inflation [J].

Acquaviva, V ;

Bartolo, N ;

Matarrese, S ;

Riotto, A .

NUCLEAR PHYSICS B, 2003, 667 (1-2) :119-148

[2] DBI in the sky: Non-Gaussianity from inflation with a speed limit [J].

Alishahiha, M ;

Silverstein, E ;

Tong, D .

PHYSICAL REVIEW D, 2004, 70 (12) :15

[3]

Arkani-Hamed N., 2004, JCAP, V04, P001

[4] The shape of non-Gaussianities [J].

Babich, D ;

Creminelli, P ;

Zaldarriaga, M .

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2004, (08) :199-217

[5] Primordial bispectrum information from CMB polarization [J].

Babich, D ;

Zaldarriaga, M .

PHYSICAL REVIEW D, 2004, 70 (08)

[6] Right-handed neutrinos as the source of density perturbations [J].

Boubekeur, Lotfi ;

Creminelli, Paolo .

PHYSICAL REVIEW D, 2006, 73 (10)

[7]

CHEN X, 2006, HEPTH0605045

[8]

Creminelli P, 2003, J COSMOL ASTROPART P

[9] A single-field consistency relation for the three-point function [J].

Creminelli, P ;

Zaldarriaga, M .

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2004, (10) :101-107

[10]

CREMINELLI P, 2006, ASTROPH0606001

← 1 2 3 →