COSMOLOGICAL TESTS AND STUDIES OF GALAXY FORMATION

2001-2002财政年度开展的研究分为两部分。一个是对斯隆数字巡天(SDSS)中进行的观测进行科学分析，另一个是利用SDSS和其他机构的数据进行宇宙学研究。8年来，我一直从事SDSS仪器的建设，直到2000年开始进行生产观测。项目现在已经成熟，是取得科学成果的时候了。我花了很多时间与美国和德国的同事以及ICRR的同事一起进行这项研究活动。研究内容包括：(1)类星体天文学(两年间发表了5篇论文)，(2)银河系天文学(12篇)，(3)宇宙大尺度结构(6篇)，(4)恒星分布的星系动力学(1篇)，(5)小行星分布(1篇)。除了这项研究活动外，我们还发表了四篇与该项目有关的技术性论文-光度定标和光谱…更多的OPIC目标选择。目前SDSS研究的主要目标是展示天文结果；我们很少考虑这些天文结果的物理意义。2001年6月，我们发布了初步校准和汇编的初步数据，供公众使用。关于SDSS中设想的科学的解释在网站上发布为Sky Server。我一直在估计附近宇宙的恒星形成速率和重元素丰度，目的是利用SDSS的数据来约束星系形成模型。然而，这项工作还没有完成。我考虑过的另一个项目是对标准宇宙学进行宇宙学测试。由于WMAP在这方面的数据发布，取得了很大的进展。我发表了一篇综述论文。还发表了另一篇论文，讨论了星系形成的时代与WMAP结果的关系。此外，还进行了一些工作，以澄清宇宙中微子观测结果对星系演化的意义。此外，我正在继续研究利用大规模宇宙模拟对星系形成的CDM模型进行测试：已经完成并提交了一篇关于概率分布函数的论文。这项工作还将继续下去。在过去的两年里，我总共撰写了37篇论文。另一方面，我承认我只能达到两年前设定的研究目标的30%，这是一个相当低的比例。较少

The research carried out in FY2001-2002 is divided into two parts. One is science analyzes of the observation performed in the Sloan Digital Sky Survey (SDSS) and the other is studies of cosmology using data from SDSS and others. I have been heavily engaged in the construction of the SDSS instruments for 8 years till Year 2000, when the production observation was started. The project is now ripe, and it is the time to obtain scientific results. I have spent a lot of time for this research activity with American and German colleagues, as well as those at ICRR. The research includes (1) quasar astronomy (5 papers were published in the two years period), (2) galactic astronomy (12 papers), (3) large-scale structure of the Universe (6 papers), (4) Galactic dynamics from the distribution of stars (1 paper), and (5) distribution of asteroids (1 paper). Besides this research activity, we have published 4 papers of technical nature concerning the Project - photometric calibration and spectrosc … More opic target selection. The primary goal of the current SDSS research is to present astronomical results ; we have done very little for considerations about physical meanings of those astronomical results. In June 2001, we have released the primary data with preliminary calibration and compilation for the public use. An explanation about the science contemplated in the SDSS is published as Sky Server in the web-site.I have been carrying out estimations of star formation rates and heavy element abundances for the nearby Universe for the purpose to constrain galaxy formation model using the SDSS data. The work, however, has not been completed yet. Another project I had contemplated is to conduct Cosmological Tests of the standard cosmology. There was great progress owing to the WMAP data release on this aspect. I published one overview paper. Yet another paper was published which discusses the epoch of galaxy formation in relation to the WMAP results. Work has also been made to clarify the meaning of Super-Kamiokande results of cosmic neutrino observations on the evolution of galaxies. Furthermore, I am continuing research for tests of the CDM model of galaxy formation employing large-scale cosmic simulations : one paper concerning the probability distribution function was completed and submitted. This work will continue further.As a whole I authored 37 papers altogether in the last two years. On the other hand, I admit that I could satisfy the research goal set two year ago only by 30%, which is quite a low fraction. Less