Collaborative Project: Large Scale Structure at High Redshift.

合作项目：高红移大型结构。

• 批准号: 9116390
• 负责人: Arlin P. Crotts
• 金额: $ 11.93万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-05-15 至 1994-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9116390&HistoricalAwards=false
• 关键词: Collaborative; Project; Large; Scale; Structure

How did the universe, which apparently began with an almost perfectly uniformly expanding Big Bang, evolve into the present exceedingly complex and granular structure of galaxies, clusters and superclusters of galaxies, and vast voids? Theories to account for this are best tested by observations of the changing clustering of objects over exceedingly great distances and look back times toward the beginning. Only quasars are bright enough to permit this, but they are too few in number to define the early structure. Far more numerous absorbing objects exist between us and the distant quasars. Using an existing multifiber spectrograph (to be in the second year of the grant) and the McDonald Observatory 2.7 - meter reflector to detect and analyze the redshifts of these absorbing clouds along lines of sight to the quasars, the clustering of large numbers of otherwise undectable high redshift objects can be described, thereby directly studying the evolution of large-scale structure in the universe. The effects of ionizing flux from quasars upon their local neutral hydrogen environment will also be measured, and the incidence will be determined. This is the second part of a two part collaborative project. Dr. Smith has worked for many years in extragalactic studies. Dr. Crotts, the co-investigator, is a leading young instrumentalist.

宇宙是如何开始的， 完美均匀膨胀的大爆炸，演化到现在 星系、星系团 超星系团和巨大的空洞 理论解释 对于这一点，最好通过观察不断变化的聚类来检验。 在遥远的距离上观察物体， 开始的时候 只有类星体足够明亮 这一点，但他们太少，以确定早期的结构。 在我们和宇宙之间存在着更多的吸收物体。 遥远的类星体 使用现有的多光纤光谱仪（将 （在拨款的第二年）和麦克唐纳天文台2.7 - 米反射器来检测和分析这些红移 吸收云沿着视线到类星体， 大量不可检测的高红移的聚集 对象可以被描述，从而直接研究进化 宇宙中的大尺度结构。 电离辐射的影响 类星体在其局部中性氢环境下的通量 也将进行测量，并确定发病率。 这是一个由两部分组成的合作项目的第二部分。 博士 史密斯从事河外星系研究多年。 博士 克罗茨，合作研究者，是一个领先的年轻乐器演奏家。