Gravitational Lenses and the Structure of Galaxies

引力透镜和星系的结构

• 批准号: 9401722
• 负责人: Christopher Kochanek
• 金额: $ 9.5万
• 依托单位: Harvard University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-08-01 至 1998-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9401722&HistoricalAwards=false
• 关键词: Gravitational; Lenses; Structure; Galaxies

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. ***

摘要Kochanek，Christopher AST-9401722引力透镜，尤其是无线电环形镜头，可以提供有关E和S0星系结构的重要新信息。 该信息与传统的动态研究无关，并且具有根本不同的系统问题。 镜头模型的最大优点是它们直接测量遥远星系中的重力场，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。 这项研究将使用算法来颠倒无线电透镜，以使用质量模型家族系统地将无线电镜头逆转镜头，以确定透镜星系内部5-10 kpc中的质量分布。 如果看到晶状体星系，MMT将用于进行比较的动力测量。 这将允许直接计算速度分散体的各向异性，并直接计算质量与光比。 反转方法还将有算法改进。 ***