A New Galaxy Redshift Survey at the Las Campanas Observatory

拉斯坎帕纳斯天文台进行的一项新的星系红移调查

• 批准号: 8717207
• 负责人: Stephen Shectman
• 金额: $ 27.42万
• 依托单位: Carnegie Institution of Washington
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-09-01 至 1992-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8717207&HistoricalAwards=false
• 关键词: New; Galaxy; Redshift; Survey; Las

A redshift survey of galaxies will enable astronomers to infer the physical structure of our Universe out to large distances. The redshift of the light from galaxies depends on the distance to the galaxy. A new galaxy redshift survey of unprecedented size will be carried out. The galaxy sample will be selected photo-electrically using the scanning Charge-Coupled Device (CCD) camera at the Las Campanas 1-meter telescope in Chile. Redshifts for 20,000 galaxies will be obtained using multiple-object spectroscopy at the wide-field Cassegrain focus of the Las Campanas 2.5-meter telescope. The median galaxy redshift will be 18,000 kilometers per seconds. The survey will sample 800 square degrees distributed over an area of one steradian of the sky. The large volume of the survey will reveal features in the galaxy distribution at the largest practicable scales. The high sampling density of the survey will reveal in detail the nature of clusters and voids in the galaxy distribution within our Universe.

对星系的红移观测将使天文学家能够推断出宇宙的物理结构。来自星系的光的红移取决于到星系的距离。一项规模空前的新星系红移调查将会进行。星系样本将通过智利拉斯坎帕纳斯1米望远镜上的扫描电荷耦合器件（CCD）相机进行光电选择。利用Las Campanas 2.5米望远镜的宽视场Cassegrain焦点的多目标光谱学，将获得20,000个星系的红移。星系红移的中位数将达到每秒18000公里。这次调查将对分布在一个直角天空区域内的800平方度的区域进行采样。大量的调查将在最大的可行尺度上揭示星系分布的特征。该调查的高采样密度将详细揭示宇宙中星系分布中的星团和空洞的性质。