Non-gaussianity of one-point distribution functions in the universe

Takayuki Tatekawa, Shuntaro Mizuno

研究成果: Conference contribution

抜粋

We study the one-point probability distribution functions (PDFs) of the density fluc- Tuation in a cosmological fluid. Within the perturbative approach to the structure formation scenario, the effect of "pressure" in the fluid has recently been an area of research interest. Here we analyze the effect of "pressure" for Lagratigian linear perturbation PDFs. Then we consider the dependence of the dark energy modeis. According to recent observations, the existence of the dark energy has been consid- ered. Even though we have obtained the constraint of the equation of the State for the dark energy (p = wp) as -1 < w < -0.78 by combining WM AP data with other astronomical data, in order to pin down w, it is necessary to present other independent observational tools. For this purpose, we consider the ui dependence of the non-Gaussianity of the density distribution generated by the nonlinear dynamics. In order to subtract the non-Gaussianity, we follow the semi-Analytic approach based on the Lagrangian linear perturbation theory which provide accurate value for the quasi-nonlinear region.

元の言語English
ホスト出版物のタイトルProceedings of the 15th Workshop on General Relativity and Gravitation in Japan, JGRG 2005
ページ328-331
ページ数4
出版物ステータスPublished - 2005
イベント15th Workshop on General Relativity and Gravitation in Japan, JGRG 2005 - Tokyo
継続期間: 2005 11 282005 12 2

Other

Other15th Workshop on General Relativity and Gravitation in Japan, JGRG 2005
Tokyo
期間05/11/2805/12/2

    フィンガープリント

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

これを引用

Tatekawa, T., & Mizuno, S. (2005). Non-gaussianity of one-point distribution functions in the universe. : Proceedings of the 15th Workshop on General Relativity and Gravitation in Japan, JGRG 2005 (pp. 328-331)