Statistically anisotropic tensor modes from inflation

Tomohiro Fujita, Ippei Obata, Takahiro Tanaka, Shuichiro Yokoyama

研究成果: Article査読

17 被引用数 (Scopus)

抄録

We consider the inflationary universe with a spectator scalar field coupled to a U(1) gauge field and calculate curvature perturbation and gravitational waves (GWs). We find that the sourced GWs can be larger than the one from vacuum fluctuation and they are statistically anisotropic as well as linearly polarized. The GW power spectrum acquires higher multipole moments with respect to the angle θ between a wave number k and a background vector field as h∝ (1-cos+cos-cos) irrespective of the model parameters.

本文言語English
論文番号023
ジャーナルJournal of Cosmology and Astroparticle Physics
2018
7
DOI
出版ステータスPublished - 2018 7月 12
外部発表はい

ASJC Scopus subject areas

  • 天文学と天体物理学

フィンガープリント

「Statistically anisotropic tensor modes from inflation」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル