Probing the Cosmic Evolution with the Most Distant Quasars

用最遥远的类星体探索宇宙演化

• 批准号: 0307384
• 负责人: Xiaohui Fan
• 金额: $ 33.19万
• 依托单位: University of Arizona
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-09-01 至 2007-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0307384&HistoricalAwards=false
• 关键词: Probing; Cosmic; Evolution; Most; Distant

AST-0307384FanThis project will carry out three aggressive observational campaigns aimed at obtaining large, complete samples of quasars at the highest redshifts, based on imaging data from the Sloan Digital Sky Survey (SDSS). A wide field survey of luminous candidates in the North Galactic Cap will find 15 to 20 quasars above redshift 5.7, a survey using the deep equatorial stripe data will provide a sample of about a thousand faint quasars above redshift 3, and a multi-wavelength follow-up will produce an unparalleled high-quality dataset for a selected sub-sample.The data will be used to study the evolution, luminosity function, and clustering of quasars, to map the accretion history of the earliest quasars and constrain their evolution, and to consider the relation between super-massive black holes and galaxy evolution. The investigators will also measure the quasar environment, including metallicity and spectral signature. Other research will follow the evolution of the intergalactic medium and the end of reionization, using absorption features in the quasar spectra and the Gunn-Peterson troughs along different lines of sight.The research will involve graduate and undergraduate students, and all of the data will be made available to the community in a timely fashion, including not just the quasar catalog but also the quasar spectra.

基于斯隆数字天空调查（SDSS）的成像数据，AST-0307384FANTHIS项目将开展三个激进的观察活动，旨在以最高的红移来获取大量的类星体样本。 对北银河帽中的候选候选物进行的广泛现场调查将在红移5.7上方15至20种类星体上找到，使用深赤道条纹数据的调查将提供大约一千个在红移3上方的微弱的类星体的样本，多波长的随访将产生无与伦比的高质量数据集的数据，以对所选的子样本进行研究。最早的类星体的积聚历史并限制了它们的演变，并考虑超质量黑洞和星系进化之间的关系。 研究人员还将测量类星体环境，包括金属性和光谱签名。 其他研究将遵循播层间培养基的演变以及电离的结束，使用Quasar Spectra中的吸收功能和Gunn-Peterson沿不同视线的吸收特征。该研究将涉及研究生和本科生，所有数据都将及时提供给社区，包括Quasar catalog catalog catalog catalog out quasar catalog out quasar catalog but quasar spempra。