Hunting for statistical anisotropy in tensor modes with B -mode observations

Takashi Hiramatsu, Shuichiro Yokoyama, Tomohiro Fujita, Ippei Obata

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7 Citations (Scopus)


We investigate the possibility of constraining statistical anisotropies of the primordial tensor perturbations by using future observations of the cosmic microwave background (CMB) B-mode polarization. By parametrizing a statistically anisotropic tensor power spectrum as Ph(k)=Ph(k)ngncosnθk, where θk is an angle of the direction of k^=k/k from a preferred direction, we find that it is possible for future B-mode observations such as CMB-S4 to detect the tensor statistical anisotropy at the level of gn∼O(0.1).

Original languageEnglish
Article number083522
JournalPhysical Review D
Issue number8
Publication statusPublished - 2018 Oct 15
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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