Statistical anisotropies in gravitational waves in solid inflation

被引：30

作者：

Akhshik, Mohammad ^{[1
]}

Emami, Razieh ^{[2
]}

Firouzjahi, Hassan ^{[3
]}

Wang, Yi ^{[4
]}

机构：

[1] Sharif Univ Technol, Dept Phys, Tehran, Iran

[2] Inst Res Fundamental Sci IPM, Sch Phys, Tehran, Iran

[3] Inst Res Fundamental Sci IPM, Sch Astron, Tehran, Iran

[4] Univ Cambridge, DAMTP, Ctr Theoret Cosmol, Cambridge CB3 0WA, England

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2014年 / 09期

基金：

欧洲研究理事会;

关键词：

inflation; cosmological perturbation theory; gravitational waves and CMBR polarization;

D O I：

10.1088/1475-7516/2014/09/012

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Solid inflation can support a long period of anisotropic inflation. We calculate the statistical anisotropies in the scalar and tensor power spectra and their cross-correlation in anisotropic solid inflation. The tensor-scalar cross-correlation can either be positive or negative, which impacts the statistical anisotropies of the TT and TB spectra in CMB map more significantly compared with the tensor self-correlation. The tensor power spectrum contains potentially comparable contributions from quadrupole and octopole angular patterns, which is different from the power spectra of scalar, the cross-correlation or the scalar bispectrum, where the quadrupole type statistical anisotropy dominates over octopole.

引用

页数：29

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