Imprints of anisotropic inflation on the cosmic microwave background

Details Imprints of anisotropic inflation on the cosmic microwave background Imprints of anisotropic inflation on the cosmic microwave background

2010-11-16

arxiv.org/abs/1011.3604v3

MNRAS: Letters, 412 (2011), Issue 1, pp. L83-L87

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

5 pages, 2 figures;(v2) references added;(v3) replaced with the version accepted by MNRAS Letters

Scientific paper

10.1111/j.1745-3933.2011.01010.x

We study the imprints of anisotropic inflation on the CMB temperature fluctuations and polarizations. The statistical anisotropy stems not only from the direction dependence of curvature and tensor perturbations, but also from the cross correlation between curvature and tensor perturbations, and the linear polarization of tensor perturbations. We show that off-diagonal $TB$ and $EB$ spectrum as well as on- and off-diagonal $TT, EE, BB, TE$ spectrum are induced from anisotropic inflation. We emphasize that the off-diagonal spectrum induced by the cross correlation could be a characteristic signature of anisotropic inflation.

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