Gravitational Lenses and the Structure of Galaxies

引力透镜，特别是射电环透镜，可以提供关于E和S0星系结构的重要新信息。这种信息独立于传统的动态研究，具有完全不同的系统问题。透镜模型最大的优点是它们直接测量遥远星系的引力场，从而避免了从动力学研究中确定质量分布所需的所有系统假设。本研究将使用反射电透镜算法，利用质量模型族系统地反射电透镜，以确定透镜星系内部5-10 kpc的质量分布。在看到透镜星系的情况下，MMT将用于进行动态测量以进行比较。这将允许速度色散的各向异性的直接计算，以及质量和光比的直接计算。在反演方法上也会有算法上的改进。＊＊＊

ABSTRACT Kochanek, Christopher AST-9401722 Gravitational lenses, particularly radio ring lenses, can provide important new information on the structure of E and S0 galaxies. This information is independent of traditional dynamically studies, and it has radically different systematic problems. The greatest advantage of lens models is that they directly measure the gravitational field in the distant galaxy, thereby avoiding all the systematic assumptions needed to determine the mass distribution from dynamical studies. This research will use algorithms for inverting radio lenses to systematically invert the radio lenses using families of mass models to determine the mass distributions in the inner 5-10 kpc of the lens galaxies. In cases where one sees the lens galaxy, the MMT will be used to make dynamical measurements for comparisons. This will allow a direct calculation of the anisotropy of the velocity dispersions, and a direct calculation of the mass to light ratio. There will also be algorithmic improvements in the inversion method. ***