jianjie

中国天文学会学术期刊

天文学进展

PROGRESS IN ASTRONOMY

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星系巡天中的线性红移畸变效应

肖伟科　郭仪成　褚耀泉
(中国科学技术大学天体物理中心　合肥 230026)

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b的测量方法和一些最新结果。

Linear Redshift Distortion in Galaxy Survey

Xiao Weike Guo Yicheng Chu Yaoquan
(Center for Astrophysics, University of Science and Technology of China, Hefei 230026)

Abstract

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 b with dynamical and statistical methods. The theory of the linear redshift distortions, the basic methods of measuring b and some new measurements are reviewed.