Gravitational Optics, Dark Matter, and the Evolution of Faint Galaxies

引力光学、暗物质和微弱星系的演化

• 批准号: 0444059
• 负责人: Roger Blandford
• 金额: --
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-03-01 至 2008-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0444059&HistoricalAwards=false
• 关键词: Gravitational; Optics; Dark; Matter; Evolution

AST 0206286BlandfordThere is now considerable evidence that at least eighty percent of the matter in the Universe is in a dark form that cannot be seen directly, using astronomical telescopes. This dark matter is found on scales spanning six decades, from the cores of galaxies to the size of the Universe. One of the best ways to probe the distribution of this dark matter is to use gravitational optics - the measurement of the small deflections of light rays induced by the gravitational force from the dark matter itself. By measuring these light deflections, we can infer the properties of the dark matter. Over the past two decades, Dr. Blandford and his collaborators have devised a suite of specialized techniques to detect dark matter over this wide range, from cores of galaxies to scales up to 106 times larger. This project will contribute to the development of several of these techniques and will implement them in three cases where data already exists that can be used for this purpose. These will be used to construct an integrated, observationally based description of the distribution of dark matter in the universe that can be used to compare with theoretical calculations. ****

现在有相当多的证据表明，宇宙中至少有80%的物质是暗的，用天文望远镜无法直接看到。这种暗物质被发现的尺度跨越60年，从星系的核心到宇宙的大小。探测这种暗物质分布的最好方法之一是使用引力光学--测量由暗物质本身的引力引起的光线的微小偏转。通过测量这些光偏转，我们可以推断暗物质的性质。在过去20年里，布兰德福德博士和他的合作者设计了一套专门的技术来探测如此大范围内的暗物质，从星系的核心到尺度高达106倍的暗物质。该项目将促进其中几项技术的发展，并将在已经存在可用于这一目的的数据的三种情况下实施这些技术。这些将被用来构建一个完整的、基于观测的宇宙中暗物质分布的描述，可以用来与理论计算进行比较。****