Investigations of Quasars and Emission-Line Galaxies

该研究计划的主要目标是产生一个大的、完整的、定义良好的和严格控制的明亮类星体样本；获得狭缝分光光度测量和成像观测，用于统计研究以及研究气体的物理和化学性质；以及对我们和类星体之间的发射和吸收云进行详细的理论分析。新的类星体将通过它们的光学谱线特征来探测。与以前的调查相比，完全自动化的物体选择程序和在现有望远镜上对选定物体进行更详细观测的规定是重要的改进。通过增加对以下内容的理解，可以预期天文学的主要贡献：1)各种类型活动星系的亮度和其他关系，2)类星体光谱中的宽吸收线，3)类星体红移和亮度分布，以及4)紧密类星体对红移的可能关联。这项对类星体和发射线星系的调查将补充其他天文学家小组正在进行的观测。

The principal objectives of the research program are to produce a large, complete, well defined, and carefully controlled sample of bright quasars; to obtain slit spectrophotometry and imaging observations for purposes of statistical investigations as well as studies of physical and chemical gas properties; and to carry out detailed theoretical analyses of the emitting and absorbing clouds between us and the quasars. The new quasars are to be detected by means of their optical spectral line characteristics. A fully automated object selection procedure and provisions for obtaining more detailed observations of selected objects at available telescopes are important improvements over previous surveys. Major contirbutions to astronomy can be expected through increased understanding of: 1) the brightness and other relationships for various types of active galaxies, 2) the broad- absorption-lines in quasar spectra, 3) the quasar redshift and brightness distribution, and 4) possible correlations in the redshifts of close quasar pairs. This survey of quasars and emission-line galaxies will complement observations being carried out by other groups of astronomers.