星系巡天中的线性红移畸变效应  

Linear Redshift Distortion in Galaxy Survey

作　　者：肖伟科[1] 郭仪成[1] 褚耀泉[1] 

机构地区：[1]中国科学技术大学天体物理中心,合肥230026

出　　处：《天文学进展》2002年第4期371-378,共8页Progress In Astronomy

摘　　要：在红移巡天中,由于星系本动速度的存在,星系的三维空间分布图像将会发生畸变,这种效应使得我们可以用动力学与统计方法,通过测量线性红移畸变因子来获取宇宙中大尺度上物质分布的信息。介绍了线性红移畸变效应的图像、理论,以及线性红移畸变因子β的测量方法和一些最新结果。The maps of galaxy distribution in the Universe obtained from the redshift survey are distorted by the peculiar velocities of galaxies. This effect, which is called redshift distortion, provides a way to investigate the matter distribution on large scale by analysing the linear redshift distortion parameter β with dynamical and statistical methods. The theory of the linear redshift distortions, the basic methods of measuring β and some new measurements are reviewed.

关 键 词：宇宙大尺度结构 本动速度 红移巡天 星系 线性红移畸变效应 

分 类 号：P157[天文地球—天文学] P159.4