Imprints of the anisotropic inflation on the cosmic microwave background

Masa aki Watanabe, Sugumi Kanno, Jiro Soda

Research output: Contribution to journalArticlepeer-review

100 Citations (Scopus)


We study the imprints of the 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 offdiagonal TB and EB spectra as well as on- and off-diagonal TT, EE, BB and TE spectra are induced from the anisotropic inflation. We emphasize that the off-diagonal spectra induced by the cross-correlation could be a characteristic signature of the anisotropic inflation.

Original languageEnglish
Pages (from-to)L83-L87
JournalMonthly Notices of the Royal Astronomical Society: Letters
Issue number1
Publication statusPublished - Mar 2011
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


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