Higher-order Lagrangian perturbative theory for the Cosmic Web

Takayuki Tatekawa, Shuntaro Mizuno

研究成果: Article

抜粋

Zel'dovich proposed Lagrangian perturbation theory (LPT) for structure formation in the Universe. After this, higher-order perturbative equations have been derived. Recently fourth-order LPT (4LPT) have been derived by two group. We have shown fifth-order LPT (5LPT) In this conference, we notice fourth- and more higher-order perturbative equations. In fourth-order perturbation, because of the difference in handling of spatial derivative, there are two groups of equations. Then we consider the initial conditions for cosmological N-body simulations. Crocce, Pueblas, and Scoccimarro (2007) noticed that second-order perturbation theory (2LPT) is required for accuracy of several percents. We verify the effect of 3LPT initial condition for the simulations. Finally we discuss the way of further improving approach and future applications of LPTs.

元の言語English
ページ(範囲)119-120
ページ数2
ジャーナルProceedings of the International Astronomical Union
11
DOI
出版物ステータスPublished - 2014
外部発表Yes

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ASJC Scopus subject areas

  • Astronomy and Astrophysics

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