The ray-bundle method for calculating weak magnification by gravitational lenses

被引:24
作者
Fluke, CJ [1 ]
Webster, RL [1 ]
Mortlock, DJ [1 ]
机构
[1] Univ Melbourne, Sch Phys, Parkville, Vic 3052, Australia
关键词
methods : numerical; gravitational lensing;
D O I
10.1046/j.1365-8711.1999.02534.x
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present here an alternative method for calculating magnifications in gravitational lensing calculations - the ray-bundle method. We provide a detailed comparison of the distribution of magnifications obtained by this method with those obtained through analytic results and conventional ray-shooting methods. The ray-bundle method provides high accuracy in the weak lensing limit, and is computationally much faster than (non-hierarchical) ray-shooting methods of a comparable accuracy. The ray-bundle method is a powerful and efficient technique with which to study gravitational lensing within realistic cosmological models, particularly in the weak lensing limit.
引用
收藏
页码:567 / 574
页数:8
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