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).

这项研究围绕着三项研究，这些研究将利用两种引力透镜的特性：1）背景星系在前景星系周围切向扭曲（镜片）和2）背景星系在前景星系中升高。 第一项研究将使用现有的宽场调查来通过星系 - 果胶镜头来表征单个星系暗光晕。 第二个将测试为星系簇假设的暗物质轮廓是否可以同时再现弱透镜剪切和簇速度分散体。 第三个将研究一组0.5-1处的正常恒星星系的中红外光度特性，这些星系已被星系簇强烈放大，重点关注多环芳烃的发射特征（PAHS）。