论文标题
血浆强镜头的扰动和数值方法
Perturbative and numerical approach to plasma strong lensing
论文作者
论文摘要
{使用两种不同的方法，我们考虑了质子环境对光传播的影响，研究了强晶状体制度中的成像。首先，我们扩展了扰动方法的使用，该方法使我们能够快速和分析地计算出由银河系镜头镜头的圆形源的位置和形状。将这种方法与从晶状体方程的数值解中获得的方法进行比较。其次，我们引入了一个三维球体模型，以描述与镜头星系周围的暗物质光环相关的时空以及相关的光学指标，以结合血浆介质的存在。还分析了特定构型的（色）上的（色）变形以及图像的相关多样性。
{Using two different approaches, we study imaging in the strong lens regime taking into account the effects of plasmatic environments on light propagation. First, we extend the use of a perturbative approach that allows us to quickly and analytically calculate the position and shape of the images of a circular source lensed by a galaxy. Such approach will be compared with that obtained from the numerical solution of the lens equations. Secondly, we introduce a 3-dimensional spheroidal model to describe the spacetime associated with the dark matter halo around the lens galaxy and an associated optical metric to incorporate the presence of the plasma medium. The (chromatic) deformation on caustic and critical curves and associated multiplicity of images is also analyzed for particular configurations.
