Minilensing of multiply imaged quasars: flux variations and vanishing of images
Minilensing of multiply imaged quasars: flux variations and vanishing of images
复制标题
多重成像类星体的微透镜：通量变化和图像消失
DOI：
10.1086/162862
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发表时间：
1985
期刊：
影响因子：
--
通讯作者：
D. Narasimha
中科院分区：
文献类型：
--
作者：
K. Subramanian;S. Chitre;D. Narasimha
通过建立一个分析框架，研究了位于透镜星系和星系团中的小透镜对多重成像类星体光路的引力影响。采用该数学公式推导了由微透镜引起的通量变化，并数值计算了接近孪生类星体0957+561 A，B像的各种微透镜路径的显式光变曲线。它表明，在某些情况下，操作的minilensing可以导致消失的图像。这一特征可以为透镜中的类星体结构和暗物质提供诊断探针，也可以作为引力透镜模型的测试。主题标题：
The gravitational influence of minilenses which are located in lens galaxies and clusters and which intercept the light paths from multiply imaged quasars is investigated by developing an analytical framework. The mathematical formulation is adopted for deriving flux variations due to minilensing, and explicit light curves are computed numerically for a variety of minlens paths coming close to the images of the twin quasar 0957+561 A,B. It is demonstrated that under certain circumstances the operation of minilensing can lead to the vanishing of an image. This feature could provide a diagnostic probe of quasar structure and dark matter in the lenses and also serve as a test of gravitational lens models. Subject headings: