Surveying Galaxies in the High-Redshift Universe

调查高红移宇宙中的星系

• 批准号: 0607850
• 负责人: Esther Hu
• 金额: $ 28.15万
• 依托单位: University of Hawaii
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-08-01 至 2011-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0607850&HistoricalAwards=false
• 关键词: Surveying; Galaxies; Redshift; Universe

AST-0607850HuThe physical properties, numbers, distribution, and evolution of the earliest galaxies are rapidly coming within our grasp. This program will explore the formation and properties of very early, high redshift (z = 5-7) galaxies. The Keck and Subaru telescopes in Hawaii will be used for an extensive faint, emission-line, galaxy survey, combined with extremely deep multi-color imaging to identify candidate galaxies bright in the hydrogen Lyman-alpha line. Spectroscopic observations will confirm the final high-z sample. This technique has already successfully found sources at z ~ 5.7 and z ~ 6.5, a range of special significance because of work indicating that the epoch of reionization occurs at z ~ 6 or earlier. The sample will provide insight into the global star formation history of the Universe and the evolution of emission-line-selected galaxies, and will help to prepare for searches to even higher redshifts. The spatial and redshift distributions, surface density and fluxes of these galaxies will be used to examine early large-scale structure formation.This project mainly supports a Japanese female graduate student, part of the principal investigator's continued commitment to encouraging women in science, and to supporting relations with the Japanese astronomical community.

AST-0607850 HuThe physical properties，numbers，distribution，and evolution of the earliest galaxies are rapidly coming in our grafts.最早的星系的物理性质，数量，分布和演化正在迅速进入我们的掌握之中。 该计划将探索非常早期，高红移（z = 5-7）星系的形成和性质。 位于夏威夷的凯克和斯巴鲁望远镜将用于广泛的微弱发射线星系调查，并结合极深的多色成像，以确定在氢莱曼α线中明亮的候选星系。 光谱观测将确认最终的高Z样品。 这项技术已经成功地发现了z ~ 5.7和z ~ 6.5的源，这是一个特别重要的范围，因为工作表明再电离的时期发生在z ~ 6或更早。 该样本将提供对宇宙的全球星星形成历史和发射线选择星系演化的深入了解，并将有助于为更高红移的搜索做好准备。 这些星系的空间和红移分布、表面密度和通量将用于研究早期大尺度结构的形成，该项目主要资助一名日本女研究生，这是首席研究员继续致力于鼓励妇女从事科学工作和支持与日本天文学界关系的一部分。