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Study of the structure and evolution of galaxies based on infrared observations of stars at the latest stage of their evolution

基于恒星演化最新阶段的红外观测研究星系的结构和演化

基本信息

批准号：
04402002
负责人：
TSUJI Takashi
金额：
$ 24.19万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (A)
财政年份：
1992
资助国家：
日本
起止时间：
1992 至 1994
项目状态：
已结题

项目摘要

The purpose of the present research is to clarify the structure and evolution of galaxies on the basis of infrared observations of stars at the latest stage of their evolution. The rapid developments of the infrared array detectors in recent years made it possible to study cool stars, which can be used as probes to clarify the basic structure of galaxies.For this purpose, we first developed infrared camera and spectrograph by the use of a large format infrared array detector PtSi 1040X1040. As the control system, we designed and manufactured a high speed and high precision AD converter based on the Messia (a CCD driving system developed at the National Astronomical Observatory). Our new system can be used for general purpose. We have developed new instruments equipped with a large format infrared array to be drived by our new control system :1) Wide field infrared camera to be used with Kiso 105 cm Schmidt telescope.2) Infrared spectrograph to be used at the coude focus of the 188cm reflector at the Okayama Astrophysical Observatory.At present, the noise level of the detector is somewhat higher than expected, and we are doing our last efforts to improve this together with adjustments of the hard and soft wares of our system.We also developed a computer system to analyze the IRAS database, which is the baic data for our present study. This data analysis system is also important for analyzing the data to be obtained by the new insruments mentioned above and by the ISO to be lauched this autumn. We further started to develope algorithm and softwares to analyze the data to be obtained by the ISO.For example, we have examined in detail the image reconstruction algorithm to be used for detecting faint images and this is the basis of our search for primeval galaxies in the infrared.

本研究的目的是在对恒星演化最新阶段的红外观测的基础上阐明星系的结构和演化。近年来红外阵列探测器的快速发展使得研究冷恒星成为可能，可以作为阐明星系基本结构的探针。为此，我们首先利用大画幅红外阵列探测器PtSi 1040X1040开发了红外相机和光谱仪。作为控制系统，我们设计并制造了基于Messia（国家天文台开发的CCD驱动系统）的高速高精度AD转换器。我们的新系统可用于通用目的。我们开发了配备大幅面红外阵列的新仪器，由我们的新控制系统驱动：1）与木曾105厘米施密特望远镜一起使用的宽视场红外相机。2）在冈山天体物理观测站188厘米反射镜的焦距处使用红外光谱仪。目前，探测器的噪音水平比预期的要高一些，我们正在尽最后的努力我们还开发了一个计算机系统来分析IRAS数据库，这是我们当前研究的基础数据。该数据分析系统对于分析上述新工具和今年秋季推出的 ISO 所获得的数据也很重要。我们进一步开始开发算法和软件来分析ISO获得的数据。例如，我们详细研究了用于检测微弱图像的图像重建算法，这是我们在红外中寻找原始星系的基础。