The Effects of Massive Substructures on Image Multiplicities in Gravitational Lenses
The Effects of Massive Substructures on Image Multiplicities in Gravitational Lenses
复制标题
引力透镜中大量子结构对图像多重性的影响
DOI：
10.1086/392491
复制
发表时间：
2003
期刊：
影响因子：
--
通讯作者：
C. S. Kochanek
中科院分区：
文献类型：
--
作者：
Joanne Cohn;C. S. Kochanek
对引力透镜系统的调查通常发现，具有四个（或更多）图像的透镜的比例明显大于标准椭球透镜模型的预测（50%对25%-30%）。我们表明，包括较小的卫星星系的影响，通过观测归一化的丰度，显着增加了具有两个以上图像的系统的预期数量，并在很大程度上解释了差异。这种效应主要由主透镜亮度约20%的卫星控制，与观测卫星的典型亮度大致一致。我们发现带卫星的透镜系统不能从基于引力透镜统计的宇宙学模型估计中删除，而不会造成结果的显著偏差。
Surveys for gravitational lens systems have typically found a significantly larger fraction of lenses with four (or more) images than are predicted by standard ellipsoidal lens models (50% versus 25%-30%). We show that including the effects of smaller satellite galaxies, with an abundance normalized by the observations, significantly increases the expected number of systems with more than two images and largely explains the discrepancy. The effect is dominated by satellites with ~20% the luminosity of the primary lens, in rough agreement with the typical luminosities of the observed satellites. We find that the lens systems with satellites cannot be dropped from estimates of the cosmological model based on gravitational lens statistics without significantly biasing the results.
DOI：
10.1046/j.1365-8711.2001.04029.x
发表时间：
2001-02-21
影响因子：
4.8
作者：
Jenkins, A;Frenk, CS;Yoshida, N
通讯作者：
Yoshida, N