Unified Analysis of Structure Formations and Evolutions in the Deep Universe

宇宙深处结构形成与演化的统一分析

基本信息

批准号：
10640229
负责人：
GOUDA Naoteru
金额：
$ 1.47万
依托单位：
National Astronomical Observatory of Japan (1999-2000)Osaka University (1998)
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 2000
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10640229/
关键词：
galaxy formations large scale structues in the universe self-gravitating many-body systems

项目摘要

1. We developed a semi-analytic model for resolving the problems of galaxy formations and got some interesting results using this semi-analytic model based on the hierarchical clustering. By using this model, we tried to clarify what physical processes, which have never been taken into account in the galaxy formation models, influence on galaxy formations and evolutions. Furthermore, we tried to constrain the cosmological models and some physical processes concerned in the galaxy formations, such as star formations. The detailed topics on the galaxy formations are shown below.(1) The effects of merging histories of proto-objects on the angular momentum distributions of the present-time dark matter haloes were clarified.(2) We investigated the effects of the UV background radiation on galaxy formations by using the semi-analytic model including the photoionization process and we clarified its effects on the galaxy formations.(3) We calculated the detection rate of cold gas in elliptical … More galaxies using the semi-analytic model of galaxy formation, and compared it with observations. Then we could constrain the star formation rates in the galaxy formations.(4) We clarified the physical origin of the color-magnitude relation of elliptical galaxies in clusters of galaxies in the hierarchical clustering scenario by using the semi-analytic model.(5) The galaxy number counts are analyzed by using the semi-analytic model based on the hierarchical clustering scenario. In this model, we introduced the selection effects due to the rapidly dimming surface brightness at high redshift and the absorption by intergalactic HI clouds and by internal dust, which are not considered in the previous analysis of galaxy counts.2. The relation between relaxation, the time scale of Lyapunov instabilities, and the Kolmogorov-Sinai time in a one-dimensional gravitating sheet is studied. We found that the relaxation time to the final thermal equilibrium differs from the inverse of the Lyapunov exponents and the Kolmogorov-Sinai time.3. We found the relation between the two-point spatial correlation function and the density profile of the dark matter halos in the strongly nonlinear regime. Less

1。我们开发了一个半分析模型，用于解决星系地层的问题，并使用基于分层聚类的半分析模型获得了一些有趣的结果。通过使用此模型，我们试图澄清哪些物理过程在银河系中从未考虑到的物理过程，对银河系的影响和进化。此外，我们试图限制星系形成（例如恒星形成）中有关的宇宙学模型和一些物理过程。关于银河系地层的详细主题如下所示。（1）阐明了原始目标对当前时间暗物质光环的角动量分布的合并历史的影响。（2）我们研究了UV背景辐射对星系形成的影响，通过使用半无分析模型来使用光化学范围，包括对（Callaxy）的效果（我们对Collaxy的效果（3）。椭圆形…使用星系形成的半分析模型的更多星系，并将其与观测值进行了比较。然后，我们可以在星系形成中限制恒星形成率。（4）我们阐明了通过使用半分析模型在层次集群场景中椭圆形星系群中椭圆形星系的物理起源。（5）通过使用半融合模型来分析星系数量，分析了银河数计数。在该模型中，我们引入了由于高红移和播出的HI云的抽象和内部灰尘的抽象而引起的选择效果，而在Galaxy Counts的先前分析中未考虑。2。研究了在一维引力纸上放松，Lyapunov不稳定性的时间尺度与Kolmogorov-Sinai时间之间的关系。我们发现，与Lyapunov指数倒数和Kolmogorov-Sinai Time.3的最终热等效差的放松时间3。我们发现，在强烈非线性方案中，两点空间相关函数与暗物质光环的密度曲线之间的关系。较少的