The Universe at z=5: High-redshift quasars from the Sloan Digital Sky Survey

z=5 处的宇宙：来自斯隆数字巡天的高红移类星体

• 批准号: 0071091
• 负责人: Michael Strauss
• 金额: $ 29万
• 依托单位: Princeton University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-06-15 至 2004-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0071091&HistoricalAwards=false
• 关键词: Universe; z=5; redshift; quasars; Sloan

AST- 0071091StraussThe goals of this proposal are to use the Sloan Digital Sky Survey (SDSS) photometric data to identify high redshift quasars (Z ~5) and conduct a follow up analysis of these objects. The initial SDSS commissioning data have already been used to develop and prove the discovery technique and the final sample size is expected to be ~ 100 objects. These data open up a new regime and will allow the PI-CO-I's to study quasar demographics with redshift; the relationship between galaxy formation and quasar activity at high redshifts; and studies of intervening gas at high redshifts. The Sloan Digital Sky Survey is an ambitious project involving a consortium of universities and institutions around the country and around the world, to develop an accurate and complete census of the heavens in three dimensions. Using a dedicated 2.5m telescope at Apache Point Observatory, New Mexico, it will survey the sky over the next five years, compiling detailed data on 100 million galaxies, stars, and quasars. Early results from the survey have shown its potential on many fronts, including the search for the most distant objects in the universe. Quasars, which appear as unresolved, exceedingly luminous points of light in the sky, are believed to be the result of the radiation given off as material falls into a black hole one billion times more massive than the sun. Their extreme luminosity allow them to be detected at very great distances. The Sloan Survey has allowed us to discover a great number of the most distant quasars yet known. We plan to do a number of investigations of these enigmatic objects over the next few years: a). Compile complete samples of distant quasars, to study theirtendency to cluster together and to understand their evolution with time. b). Study the physical properties of these systems with telescopes sensitive to a large range of wavelengths, to understand the processes by which they formed and how they generate their tremendous luminosities. c). Study the immediate environment of these quasars to learn about their effect on neighboring galaxies, and the diffuse gas which permeates the space between quasars. d). Discover new classes of quasars and other phenomena which our complete survey should bring to light. Funding for this project was provided by the NSF program for ExtragalacticAstronomy & Cosmology (AST/EXC).***

AST- 0071091Strauss 该提案的目标是使用斯隆数字巡天（SDSS）光度数据来识别高红移类星体（Z ~5）并对这些天体进行后续分析。最初的 SDSS 调试数据已用于开发和证明发现技术，最终样本量预计约为 100 个物体。这些数据开辟了一个新的体系，并使 PI-CO-I 能够利用红移来研究类星体人口统计；高红移时星系形成与类星体活动之间的关系；以及高红移介入气体的研究。 斯隆数字天空调查是一个雄心勃勃的项目，涉及全国和世界各地的大学和机构组成的联盟，旨在对天空进行准确、完整的三维普查。 它将使用新墨西哥州阿帕奇角天文台的专用 2.5m 望远镜，在未来五年内勘测天空，收集有关 1 亿个星系、恒星和类星体的详细数据。 这项调查的早期结果显示了它在许多方面的潜力，包括寻找宇宙中最遥远的物体。 类星体在天空中表现为未解析的、极其明亮的光点，被认为是物质落入比太阳质量十亿倍的黑洞时发出的辐射的结果。 它们的极高亮度使它们能够在很远的距离被检测到。斯隆巡天让我们发现了大量迄今为止已知的最遥远的类星体。 我们计划在未来几年内对这些神秘物体进行多项调查：a)。 编译遥远类星体的完整样本，研究它们聚集在一起的趋势并了解它们随时间的演化。 b). 使用对大范围波长敏感的望远镜研究这些系统的物理特性，以了解它们形成的过程以及它们如何产生巨大的光度。 c). 研究这些类星体的直接环境，以了解它们对邻近星系的影响，以及渗透到类星体之间空间的扩散气体。 d). 发现新类别的类星体和其他现象，我们的完整调查应该揭示这些现象。该项目的资金由 NSF 河外天文学和宇宙学计划 (AST/EXC) 提供。***