Non-Linear Growth of Cosmological Density Fluctuation and Type of Singularity : Astrophysics and Relativity
スポンサーリンク
概要
- 論文の詳細を見る
Non-linear growth of density fluctuation in one-dimensional self-gravitating system in the expanding universe is investigated. It is found that the Fourier spectrum of density fluctuation obeys a power law in the small-scale when the singularity of density is first formed. The power index of the Fourier spectrum is -1/3 for almost any initial conditions of density perturbations. The power index is determined only by the type of singularity of the density, which is A3 type in accord with the classification in the catastrophe theory. We also found that the effect of non-linearity is very large for the growth of density fluctuations compared with the estimate of the growth rate using a linear theory.
- 理論物理学刊行会の論文
- 1988-04-25
著者
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GOUDA Naoteru
Department of Earth and Space Science, Graduate School of Science Osaka University
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Gouda Naoteru
Department Of Earth And Space Science Faculty Of Science Osaka University
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Nakamura Takashi
Department Of Cardiology Saiseikai Shiga Hospital
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