Cosmological Applications of Gravitational Lensing

引力透镜的宇宙学应用

• 批准号: 0098572
• 负责人: Tereasa Brainerd
• 金额: $ 24.27万
• 依托单位: Trustees of Boston University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-05-01 至 2005-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0098572&HistoricalAwards=false
• 关键词: Cosmological; Applications; Gravitational; Lensing

This research centers around three investigations that will make use of two properties of gravitational lenses: 1) background galaxies are distorted tangentially around foreground galaxies (lenses), and 2) background galaxies are boosted in flux by foreground galaxies. The first study will use an existing wide-field survey to characterize individual galaxy dark halos via galaxy-galaxy lensing. The second will test whether the dark matter profile hypothesized for clusters of galaxies can simultaneously reproduce weak lensing shear and cluster velocity dispersions. The third will investigate the mid-infrared photometric properties of a set of normal star-forming galaxies at redshifts of 0.5-1 that have been strongly amplified by galaxy clusters, focussing on the emission features of polycyclic aromatic hydrocarbons (PAHs).

这项研究围绕三项研究展开，这些研究将利用引力透镜的两个特性：1）背景星系在前景星系（透镜）周围切向扭曲，2）背景星系的通量受到前景星系的增强。 第一项研究将利用现有的广域调查，通过星系-星系透镜效应来表征单个星系的暗晕。 第二个将测试星系团假设的暗物质轮廓是否可以同时再现弱透镜剪切和星系团速度色散。 第三个项目将研究一组红移为 0.5-1 的正常恒星形成星系的中红外光度特性，这些星系团已被星系团强烈放大，重点关注多环芳烃 (PAH) 的发射特征。