2018年10月
Hunting for Statistical Anisotropy in Tensor Modes with B-mode Observations
Physical Review
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- 巻
- D98
- 号
- 開始ページ
- 083522
- 終了ページ
- 記述言語
- 英語
- 掲載種別
- 研究論文（学術雑誌）
We investigate a possibility of constraining statistical anisotropies of the<br />
primordial tensor perturbations by using future observations for the Cosmic<br />
Microwave Background (CMB) B-mode polarization. By parameterizing a<br />
statistically-anisotropic tensor power spectrum as $P_h ({\boldsymbol{k } }) =<br />
P_h (k) \sum_n g_n \cos^n \theta_{\boldsymbol{k } }$, where<br />
$\theta_{\boldsymbol{k } }$ is an angle of the direction of<br />
$\hat{k}={\boldsymbol{k } }/k$ from a preferred direction, we find that it would<br />
be possible for future B-mode observations such as CMB-S4 to detect the tensor<br />
statistical anisotropy at the level of $g_n \sim {\mathcal O} (0.1)$.
primordial tensor perturbations by using future observations for the Cosmic<br />
Microwave Background (CMB) B-mode polarization. By parameterizing a<br />
statistically-anisotropic tensor power spectrum as $P_h ({\boldsymbol{k } }) =<br />
P_h (k) \sum_n g_n \cos^n \theta_{\boldsymbol{k } }$, where<br />
$\theta_{\boldsymbol{k } }$ is an angle of the direction of<br />
$\hat{k}={\boldsymbol{k } }/k$ from a preferred direction, we find that it would<br />
be possible for future B-mode observations such as CMB-S4 to detect the tensor<br />
statistical anisotropy at the level of $g_n \sim {\mathcal O} (0.1)$.
- ID情報
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- arXiv ID : arXiv:1808.08044