Gravitational Lenses and the Structure of Galaxies

摘要 Kochanek，Christopher AST-9401722 引力透镜，特别是射电环透镜，可以提供关于E和S 0星系结构的重要新信息。 这种信息是独立于传统的动态研究，它有根本不同的系统问题。 透镜模型的最大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。 这项研究将使用反射电透镜的算法，系统地使用质量模型族反射电透镜，以确定透镜星系内部5-10 kpc的质量分布。 在观察到透镜星系的情况下，MMT将被用来进行动力学测量以进行比较。 这将允许直接计算速度色散的各向异性，以及直接计算质光比。 在反演方法中也将有算法改进。 ***

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. ***