Non-Gaussianity of the density distribution in accelerating universes II:N-body simulations

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Author: TATEKAWA, Takayukiほか

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Publication date: 2012-05

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Note (General)：: We explore the possibility of putting constraints on dark energy models with statistical property of large scale structure in the non-linear region. I...

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Material Type: 文書・図像類
Title: Non-Gaussianity of the density distribution in accelerating universes II:N-body simulations
Author/Editor: TATEKAWA, Takayuki
MIZUNO, Shuntaro
Author Heading: TATEKAWA, Takayuki
MIZUNO, Shuntaro
Publication Date: 2012-05
Publication Date (W3CDTF): 2012-05
Periodical title: Journal of cosmology and astroparticle physics
No. or year of volume/issue: 2007 2
Volume: 2007
Issue: 2
Pages: 14-
ISSN (Periodical Title): ISSN : 1475-7516
Text Language Code: eng
Subject Heading: cosmology
non-Gausianity
dark energy
Target Audience: 一般
Note (General): We explore the possibility of putting constraints on dark energy models with statistical property of large scale structure in the non-linear region. In particular, we investigate the w dependence of non-Gaussianity of the smoothed density distribution generated by the nonlinear dynamics. In order to follow the non-linear evolution of the density fluctuations, we apply N-body simulations based on P3M scheme. We show that the relative difference between non-Gaussianity of w = -0.8 model and that of w = -1.0 model is 0.67% (skewness) and 1.2% (kurtosis) for R = 8h-1 Mpc. We also calculate the correspondent quantities for R = 2h-1 Mpc, 3.0% (skewness) and 4.5% (kurtosis), and the difference turn out to be greater, even though non-linearity in this scale is so strong that the complex physical processes about galaxy formation affect the galaxy distribution. From this, we can expect that the difference can be tested by all sky galaxy surveys with the help of mock catalogs created by selection functions, which suggests that non-Gaussianity of the density distribution potentially plays an important role for extracting information on dark energy.
Access Restrictions: 限定公開
Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）
https://irdb.nii.ac.jp
Original Data Provider (Database): 福井大学 : 福井大学学術機関リポジトリ