A general analysis of non-gaussianity from isocurvature perturbations

Masahiro Kawasaki, Kazunori Nakayama, Toyokazu Sekiguchi, Teruaki Suyama, Fuminobu Takahashi

研究成果: ジャーナルへの寄稿学術論文査読

52 被引用数 (Scopus)

抄録

Light scalars may be ubiquitous in nature, and their quantum fluctuations can produce large non-Gaussianity in the cosmic microwave background temperature anisotropy. The non-Gaussianity may be accompanied with a small admixture of isocurvature perturbations, which often have correlations with the curvature perturbations. We present a general method to calculate the non-Gaussianity in the adiabatic and isocurvature perturbations with and without correlations, and see how it works in several explicit examples. We also show that they leave distinct signatures on the bispectrum of the cosmic microwave background temperature fluctuations.

本文言語英語
論文番号042
ジャーナルJournal of Cosmology and Astroparticle Physics
2009
1
DOI
出版ステータス出版済み - 2009

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