Various Approaches to Cosmological Gravitational Lensing in Inhomogeneous Models
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概要
- 論文の詳細を見る
Gravitational lensing of distant objects caused by gravitational tidal forces from inhomogeneities in the universe is weak in most cases, but it is noticed that it gives a great deal of information about the universe, especially regarding the distribution of dark matter. The statistical values of optical quantities such as convergence, amplification and shear have been derived by many people using various approaches, which include the linear perturbational treatment in the weak limit and the nonlinear treatment considering small-scale matter distribution. In this review paper we compare the following three main approaches: (a) the approach in the multi-lens-plane theory; (b) the approach due to the direct integration method; and (c) the perturbational approach. In the former two approaches inhomogeneous matter distributions are produced in the CDM model using N-body simulations (the P^3M code and the tree-code, respectively). In (c) the power spectrum corresponding to the CDM model is used for the large-scale matter distribution.
- 理論物理学刊行会の論文
- 1999-05-31
著者
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Tomita K
Yukawa Institute For Theoretical Physics Kyoto University
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Nakamura Takahiro
Department Of Allergy And Immunology National Research Institute For Child Health And Development Na
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Tomita Kenji
Yukawa Institute For Theoretical Physics Kyoto University
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Tomita Kenji
Research Institute For Theoretical Physics Hiroshima Unviersity
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Tomita Kenji
Research Institute For Theretical Physics Hiroshima University
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Nakamura Takahiro
Department Of Physics The University Of Tokyo
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PREMADI Premana
Astronomical Institute, Tohoku University
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Premadi Premana
Astronomical Institute Tohoku University
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Tomita Kenji
Research Institute Of Theoretical Physics Hiroshima University
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TANABE Kenji
Research Institute for Theoretical Physics, Hiroshima University
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TOMITA Koji
Tokyo Development Center Yaskawa Electric MFG.Co.,LTD
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TOMITA Koji
Department of Physics, Kyushu Uniersity
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TOMITA Kenji
Uji Reseach Center, Yukawa Institute for Theoretical Physics Kyoto University
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