U.S.-Japan Cooperative Science: Studies of the Physical Properties of Galaxies with the Sloan Digital Sky Survey

该奖项支持Michael Strauss博士（普林斯顿大学）与普林斯顿大学、约翰霍普金斯大学和华盛顿大学的合作者，以及Masataka Fukugita博士（京都大学）与京都和东京的合作者之间为期三年的合作研究项目。他们计划利用斯隆数字巡天项目的数据，对星系的物理性质进行一系列调查。斯隆数字巡天（Sloan Digital Sky Survey）拥有覆盖1/4天空的5个宽光学波段的精确、校准良好的数字图像，以及关于100万个最亮星系的高质量光谱信息，有望使对星系光学特性的统计研究达到目前现有数据无法达到的复杂程度和细节。这包括详细描述星系在星等、颜色、直径和形态特性上的多元分布；寻找超低表面亮度星系；对活动星系大而完整样本的定义和研究；研究不同物理类型星系的相对群集，以及从星系光谱中研究恒星群。这项提案将支持日本和美国天文学家之间的旅行，以加强合作。因此，该提案通过国际合作实现了该计划在科学知识交流和转移方面的目标。＊＊＊

9513094 Strauss This award supports a three-year cooperative research project between Dr. Michael Strauss (Princeton University) and collaborators at Princeton, the Johns Hopkins University, and the University of Washington, and Dr. Masataka Fukugita (University of Kyoto) and collaborators in Kyoto and Tokyo. They plan to use data from the Sloan Digital Sky Survey to carry out a number of investigations of the physical nature of galaxies. The Sloan Digital Sky Survey, with accurate, well-calibrated, digital images in five broad optical bands covering 1/4 of the sky, together with high-quality spectroscopic information on the million brightest galaxies, promises to allow statistical studies of the optical properties of galaxies at a level of sophistication and detail that is currently impossible with existing data. These include detailing the multivariate distribution of galaxies in magnitude, color, diameter, and morphological properties; searches for ultra-low surface brightness galaxies; the definition and study of large, complete samples of active galaxies; studies of the relative clustering of galaxies of different physical types, and stellar population studies from the galaxy spectra. This proposal will support travel between the Japanese and US astronomers to enhance collaborations. Therefore, this proposal fulfills the objectives of the Program in its exchange and transfer of scientific knowledge through an international collaboration. ***