Determining tangential peculiar velocities of clusters of galaxies using gravitational lensing

被引：21
作者：
Molnar, SM
Birkinshaw, M
机构：
[1] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA
[2] Univ Bristol, Dept Phys, Bristol BS8 1TL, Avon, England
来源：
ASTROPHYSICAL JOURNAL | 2003年 / 586卷 / 02期
关键词：
galaxies : clusters : general; gravitational lensing;
D O I：
10.1086/346071
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We propose two new methods for measuring tangential peculiar velocities of rich clusters of galaxies. Our first method is based on weak gravitational lensing and takes advantage of the differing images of background galaxies caused by moving and stationary gravitational potentials. Our second method is based on measuring relative frequency shifts between multiple images of a single strongly lensed background galaxy. We illustrate this method using the example of galaxy cluster CL 0024+1654.
引用
收藏
页码：731 / 734
页数：4
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