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NUMERICAL ASTROPHYSICS BY ULTRA-HIGH SPEED COMPUTER (SUPERCOMPUTER AND SPATIAL PURPOSE COMPUTER)

超高速计算机数值天体物理学（超级计算机和空间计算机）

基本信息

批准号：
02302014
负责人：
MIYAMA Shoken
金额：
$ 2.88万
依托单位：
NATIONAL ASTRONOMICAL OBSERVATORY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Co-operative Research (A)
财政年份：
1990
资助国家：
日本
起止时间：
1990 至 1992
项目状态：
已结题

项目摘要

In many astronomical phenomena, self-gravity plays very important roles. Then phenomena are usually non-linear, non-stationary and non-uniform by the self-gravity. So in order to analyze them, numerical simulations by ultra-high speed computer are very effective tools. Recently, the speed of supercomputer becomes very high and the capacity of memory storage becomes very large. Hence we can analyze new complicated astronomical phenomena which could not be analysed so far. Therefore using the merit of these new computers, we must produce new software to analyze the phenomena which are based by gravity. In the case of physics in gravitational many body system, for example, globular clusters and galaxies, the basic formula in equations of motion are quite simple. Then producing special purpose computer for many body system are better choice than using general purpose computer. Therefore the main purpose of this grant-in aid for co-operative research is to produce basic software and special purpose machine in order to make numerical simulation of various astronomical phenomena.In this three-years project, the symposium was held three times. Many researches (over 200 people) attended the meeting, showed original results of astrophysics numerical simulation, reported new computational methods and had reports of newly produced special purpose computers. We also published the proceeding of the meeting as well as the collected paper of this research.

在许多天文现象中，自引力起着非常重要的作用。自引力作用下的现象通常是非线性、非平稳和非均匀的。因此，利用超高速计算机进行数值模拟是对其进行分析的有效工具。近年来，超级计算机的运行速度越来越快，存储容量也越来越大。因此，我们可以分析到目前为止无法分析的新的复杂天文现象。因此，利用这些新计算机的优点，我们必须开发新的软件来分析基于重力的现象。在物理学的引力多体系统中，例如球状星团和星系，运动方程的基本公式是相当简单的。因此，为多体系统生产专用计算机是比使用通用计算机更好的选择。因此，本次合作研究资助的主要目的是开发基础软件和专用机器，以便对各种天文现象进行数值模拟。在这个为期三年的项目中，研讨会举办了三次。许多研究人员（200多人）参加了会议，展示了天体物理数值模拟的原创成果，报告了新的计算方法，并报告了新生产的专用计算机。我们还发表了会议纪要以及本次研究的论文选集。